1
|
Jeong E, Ha CH, Kumar A, Hur W, Seong GH, Chae PS. Chromo-Fluorogenic Rhodamine-Based Amphiphilic Probe as a Selective and Sensitive Sensor for Intracellular Cu(I) in Living Cells. ACS Sens 2024; 9:1419-1427. [PMID: 38449354 DOI: 10.1021/acssensors.3c02496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2024]
Abstract
Fluorescent probes are widely studied for metal ion detection because of their multiple favorable properties such as high sensitivity and selectivity, quick response, naked eye detection, and in situ monitoring. However, optical probes that can effectively detect the Cu(I) level in cell interiors are rare due to the difficulty associated with selectively and sensitively detecting this metal ion in a cell environment. Therefore, we designed and synthesized three water-soluble probes (1-3) with a 1,3,5-triazine core decorated by three substituents: a hydrophobic alkyl chain, a hydrophilic maltose, and a rhodamine B hydrazine fluorophore. Among the probes, probe 1, which has an octyl chain and a branched maltose group, was the most effective at sensing Cu+ in aqueous solution. Upon addition of Cu+, this probe showed a dramatic color change from colorless to pink in daylight and displayed an intense yellow fluorescence emission under 365 nm light. The limit of detection and dissociation constant (Kd) of this probe were 20 nM and 1.1 × 10-12 M, respectively, which are the lowest values reported to date. The two metal ion-binding sites and the aggregation-induced emission enhancement effect, endowed by the branched maltose group and the octyl chain, respectively, are responsible for the high sensitivity and selectivity of this probe for Cu+ detection, as demonstrated by 1H NMR, dynamic light scattering, and transmission electron microscopy studies. Furthermore, the probe successfully differentiated the Cu(I) level of cancer cells from that of the normal cells. Thus, the probe holds potential for real-time monitoring of Cu(I) level in biological samples and bioimaging of cancer cells.
Collapse
Affiliation(s)
- Eunhye Jeong
- Department of Bionano Engineering, Hanyang University, Ansan 155-88, Republic of Korea
| | - Chang Hyeon Ha
- Department of Bionano Engineering, Hanyang University, Ansan 155-88, Republic of Korea
| | - Ashwani Kumar
- Department of Bionano Engineering, Hanyang University, Ansan 155-88, Republic of Korea
| | - Won Hur
- Department of Bionano Engineering, Hanyang University, Ansan 155-88, Republic of Korea
| | - Gi Hun Seong
- Department of Bionano Engineering, Hanyang University, Ansan 155-88, Republic of Korea
| | - Pil Seok Chae
- Department of Bionano Engineering, Hanyang University, Ansan 155-88, Republic of Korea
| |
Collapse
|
2
|
Yoon S, Bae HE, Hariharan P, Nygaard A, Lan B, Woubshete M, Sadaf A, Liu X, Loland CJ, Byrne B, Guan L, Chae PS. Rational Approach to Improve Detergent Efficacy for Membrane Protein Stabilization. Bioconjug Chem 2024; 35:223-231. [PMID: 38215010 DOI: 10.1021/acs.bioconjchem.3c00507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2024]
Abstract
Membrane protein structures are essential for the molecular understanding of diverse cellular processes and drug discovery. Detergents are not only widely used to extract membrane proteins from membranes but also utilized to preserve native protein structures in aqueous solution. However, micelles formed by conventional detergents are suboptimal for membrane protein stabilization, necessitating the development of novel amphiphilic molecules with enhanced protein stabilization efficacy. In this study, we prepared two sets of tandem malonate-derived glucoside (TMG) variants, both of which were designed to increase the alkyl chain density in micelle interiors. The alkyl chain density was modulated either by reducing the spacer length (TMG-Ms) or by introducing an additional alkyl chain between the two alkyl chains of the original TMGs (TMG-Ps). When evaluated with a few membrane proteins including a G protein-coupled receptor, TMG-P10,8 was found to be substantially more efficient at extracting membrane proteins and also effective at preserving protein integrity in the long term compared to the previously described TMG-A13. This result reveals that inserting an additional alkyl chain between the two existing alkyl chains is an effective way to optimize detergent properties for membrane protein study. This new biochemical tool and the design principle described have the potential to facilitate membrane protein structure determination.
Collapse
Affiliation(s)
- Soyoung Yoon
- Department of Bionano Engineering, Hanyang University ERICA, Ansan 155-88, South Korea
| | - Hyoung Eun Bae
- Department of Bionano Engineering, Hanyang University ERICA, Ansan 155-88, South Korea
| | - Parameswaran Hariharan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, Texas 79430, United States
| | - Andreas Nygaard
- Department of Neuroscience, University of Copenhagen, Copenhagen DK-2200, Denmark
| | - Baoliang Lan
- Tsinghua-Peking Center for Life Sciences, Beijing Frontier Research Center for Biological Structure, Beijing Advanced Innovation Center for Structural Biology, School of Medicine, School of Pharmaceutical Sciences, Tsinghua University, Beijing 100084, China
| | - Menebere Woubshete
- Department of Life Sciences, Imperial College London, London SW7 2AZ, U.K
| | - Aiman Sadaf
- Department of Bionano Engineering, Hanyang University ERICA, Ansan 155-88, South Korea
| | - Xiangyu Liu
- Tsinghua-Peking Center for Life Sciences, Beijing Frontier Research Center for Biological Structure, Beijing Advanced Innovation Center for Structural Biology, School of Medicine, School of Pharmaceutical Sciences, Tsinghua University, Beijing 100084, China
| | - Claus J Loland
- Department of Neuroscience, University of Copenhagen, Copenhagen DK-2200, Denmark
| | - Bernadette Byrne
- Department of Life Sciences, Imperial College London, London SW7 2AZ, U.K
| | - Lan Guan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, Texas 79430, United States
| | - Pil Seok Chae
- Department of Bionano Engineering, Hanyang University ERICA, Ansan 155-88, South Korea
| |
Collapse
|
3
|
Kumar A, Chae PS. A Naphthoquinoline-Dione-Based Cu 2+ Sensing Probe with Visible Color Change and Fluorescence Quenching in an Aqueous Organic Solution. Molecules 2024; 29:808. [PMID: 38398561 PMCID: PMC10891706 DOI: 10.3390/molecules29040808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 01/30/2024] [Accepted: 02/05/2024] [Indexed: 02/25/2024] Open
Abstract
Copper metal ions (Cu2+) are widely used in various industries, and their salts are used as supplementary components in agriculture and medicine. As this metal ion is associated with various health issues, it is necessary to detect and monitor it in environmental and biological samples. In the present report, we synthesized a naphthoquinoline-dione-based probe 1 containing three ester groups to investigate its ability to detect metal ions in an aqueous solution. Among various metal ions, probe 1 showed a vivid color change from yellow to colorless in the presence of Cu2+, as observed by the naked eye. The ratiometric method using the absorbance ratio (A413/A476) resulted in a limit of detection (LOD) of 1 µM for Cu2+. In addition, the intense yellow-green fluorescence was quenched upon the addition of Cu2+, resulting in a calculated LOD of 5 nM. Thus, probe 1 has the potential for dual response toward Cu2+ detection through color change and fluorescence quenching. 1H-NMR investigation and density functional theory (DFT) calculations indicate 1:1 binding of the metal ion to the small cavity of the probe comprising four functional groups: the carbonyl group of the amide (O), the amino group (N), and two t-butyl ester groups (O). When adsorbed onto various solid surfaces, such as cotton, silica, and filter paper, the probe showed effective detection of Cu2+ via fluorescence quenching. Probe 1 was also useful for Cu2+ sensing in environmental samples (sea and drain water) and biological samples (live HeLa cells).
Collapse
Affiliation(s)
- Ashwani Kumar
- Department of Bionano Engineering, Hanyang University, Ansan 15588, Republic of Korea
| | - Pil Seok Chae
- Department of Bionano Engineering, Hanyang University, Ansan 15588, Republic of Korea
| |
Collapse
|
4
|
Kumar A, Jeong E, Noh Y, Chae PS. Fluorescence-based ratiometric sensors as emerging tools for CN - detection: Chemical structures, sensing mechanisms and applications. Methods 2024; 222:57-80. [PMID: 38191006 DOI: 10.1016/j.ymeth.2024.01.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 01/03/2024] [Accepted: 01/05/2024] [Indexed: 01/10/2024] Open
Abstract
Hazardous cyanide anions (CN-) are increasingly threatening the environment and human health due to their widespread use in industry and many other fields. Over the past three decades, a large number of probes have been reported to sensitively and selectively detect this toxic anion, while a rather limited number of ratiometric fluorescent probes have been developed. The ratiometric probes have significant potential in bio-imaging and biomedical applications because of the ability to detect CN- in a quick, convenient and affordable way. In this review, we introduce 42 ratiometric fluorescent probes reported in the past 6 years (2018-2023) for CN- detection. Our description includes the chemical structures, photo-physical properties, CN- sensing mechanisms, solution color changes, limits of detection (LODs) and/or various applications of these chemical probes. This review provides guidelines for design and development of a new ratiometric probe for effective CN- detection.
Collapse
Affiliation(s)
- Ashwani Kumar
- Department of Bionano Engineering, Hanyang University ERICA, Ansan 155-88, Republic of Korea,.
| | - Eunhye Jeong
- Department of Bionano Engineering, Hanyang University ERICA, Ansan 155-88, Republic of Korea
| | - Youngwoo Noh
- Department of Bionano Engineering, Hanyang University ERICA, Ansan 155-88, Republic of Korea
| | - Pil Seok Chae
- Department of Bionano Engineering, Hanyang University ERICA, Ansan 155-88, Republic of Korea,.
| |
Collapse
|
5
|
Ghani L, Kim S, Ehsan M, Lan B, Poulsen IH, Dev C, Katsube S, Byrne B, Guan L, Loland CJ, Liu X, Im W, Chae PS. Melamine-cored glucosides for membrane protein solubilization and stabilization: importance of water-mediated intermolecular hydrogen bonding in detergent performance. Chem Sci 2023; 14:13014-13024. [PMID: 38023530 PMCID: PMC10664503 DOI: 10.1039/d3sc03543c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 10/22/2023] [Indexed: 12/01/2023] Open
Abstract
Membrane proteins play essential roles in a number of biological processes, and their structures are important in elucidating such processes at the molecular level and also for rational drug design and development. Membrane protein structure determination is notoriously challenging compared to that of soluble proteins, due largely to the inherent instability of their structures in non-lipid environments. Micelles formed by conventional detergents have been widely used for membrane protein manipulation, but they are suboptimal for long-term stability of membrane proteins, making downstream characterization difficult. Hence, there is an unmet need for the development of new amphipathic agents with enhanced efficacy for membrane protein stabilization. In this study, we designed and synthesized a set of glucoside amphiphiles with a melamine core, denoted melamine-cored glucosides (MGs). When evaluated with four membrane proteins (two transporters and two G protein-coupled receptors), MG-C11 conferred notably enhanced stability compared to the commonly used detergents, DDM and LMNG. These promising findings are mainly attributed to a unique feature of the MGs, i.e., the ability to form dynamic water-mediated hydrogen-bond networks between detergent molecules, as supported by molecular dynamics simulations. Thus, MG-C11 is the first example of a non-peptide amphiphile capable of forming intermolecular hydrogen bonds within a protein-detergent complex environment. Detergent micelles formed via a hydrogen-bond network could represent the next generation of highly effective membrane-mimetic systems useful for membrane protein structural studies.
Collapse
Affiliation(s)
- Lubna Ghani
- Department of Bionano Engineering, Hanyang University Ansan 155-88 South Korea
| | - Seonghoon Kim
- School of Computational Sciences, Korea Institute for Advanced Study Seoul 024-55 South Korea
| | - Muhammad Ehsan
- Department of Bionano Engineering, Hanyang University Ansan 155-88 South Korea
| | - Baoliang Lan
- Tsinghua-Peking Center for Life Sciences, Beijing Frontier Research Center for Biological Structure, Beijing Advanced Innovation Center for Structural Biology, School of Medicine, School of Pharmaceutical Sciences, Tsinghua University Beijing 100084 China
| | - Ida H Poulsen
- Department of Neuroscience, University of Copenhagen Copenhagen DK-2200 Denmark
| | - Chandra Dev
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center Lubbock Texas 79430 USA
| | - Satoshi Katsube
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center Lubbock Texas 79430 USA
| | - Bernadette Byrne
- Department of Life Sciences, Imperial College London London SW7 2AZ UK
| | - Lan Guan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center Lubbock Texas 79430 USA
| | - Claus J Loland
- Department of Neuroscience, University of Copenhagen Copenhagen DK-2200 Denmark
| | - Xiangyu Liu
- Tsinghua-Peking Center for Life Sciences, Beijing Frontier Research Center for Biological Structure, Beijing Advanced Innovation Center for Structural Biology, School of Medicine, School of Pharmaceutical Sciences, Tsinghua University Beijing 100084 China
| | - Wonpil Im
- Department of Biological Sciences, Chemistry, and Bioengineering Lehigh University Bethlehem PA 18015 USA
| | - Pil Seok Chae
- Department of Bionano Engineering, Hanyang University Ansan 155-88 South Korea
| |
Collapse
|
6
|
Kumar A, Hur W, Seong GH, Chae PS. Ratiometric orange fluorescent and colorimetric highly sensitive imidazolium-bearing naphthoquinolinedione-based probes for CN - sensing in aqueous solutions and bio-samples. Anal Chim Acta 2023; 1267:341376. [PMID: 37257976 DOI: 10.1016/j.aca.2023.341376] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Revised: 05/03/2023] [Accepted: 05/14/2023] [Indexed: 06/02/2023]
Abstract
The widespread use of cyanide (CN-) in industry results in contamination of various effluents such as drain, lake, and tap water, an imminent danger to the environment and human health. We prepared naphthoquinolinedione (cyclized; 1-5) and anthracenedione (un-cyclized) probes (6-7) for selective detection of CN-. The addition of CN- to the probe solutions (1-5) resulted in a color change from pale green to orange under 365 nm illumination. The nucleophilic addition of CN- to C2 of the imidazolium ring of the probes is responsible for selective CN- detection. Among all probes, 1 gave the lowest fluorescence-based LOD of 0.13 pM. In contrast, the un-cyclized probes (6 and 7) were substantially inferior to the cyclized counterparts (1 and 2, respectively) for detecting a trace amount of CN-. The notably low LOD displayed by probe 1 was maintained in the detection of CN- in real food samples, human fluids, and human brain cells. This is the first report studying imidazolium-bearing naphthoquinolinedione-based probes for CN- sensing in 100% water.
Collapse
Affiliation(s)
- Ashwani Kumar
- Department of Bionano Engineering, Hanyang University, Ansan, 155-88, Republic of Korea.
| | - Won Hur
- Department of Bionano Engineering, Hanyang University, Ansan, 155-88, Republic of Korea
| | - Gi Hun Seong
- Department of Bionano Engineering, Hanyang University, Ansan, 155-88, Republic of Korea
| | - Pil Seok Chae
- Department of Bionano Engineering, Hanyang University, Ansan, 155-88, Republic of Korea.
| |
Collapse
|
7
|
Ghani L, Zhang X, Munk CF, Hariharan P, Lan B, Yun HS, Byrne B, Guan L, Loland CJ, Liu X, Chae PS. Tris(hydroxymethyl)aminomethane Linker-Bearing Triazine-Based Triglucosides for Solubilization and Stabilization of Membrane Proteins. Bioconjug Chem 2023; 34:739-747. [PMID: 36919927 PMCID: PMC10145683 DOI: 10.1021/acs.bioconjchem.3c00042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 02/21/2023] [Indexed: 03/16/2023]
Abstract
High-resolution membrane protein structures are essential for a fundamental understanding of the molecular basis of diverse cellular processes and for drug discovery. Detergents are widely used to extract membrane-spanning proteins from membranes and maintain them in a functional state for downstream characterization. Due to limited long-term stability of membrane proteins encapsulated in conventional detergents, development of novel agents is required to facilitate membrane protein structural study. In the current study, we designed and synthesized tris(hydroxymethyl)aminomethane linker-bearing triazine-based triglucosides (TTGs) for solubilization and stabilization of membrane proteins. When these glucoside detergents were evaluated for four membrane proteins including two G protein-coupled receptors, a few TTGs including TTG-C10 and TTG-C11 displayed markedly enhanced behaviors toward membrane protein stability relative to two maltoside detergents [DDM (n-dodecyl-β-d-maltoside) and LMNG (lauryl maltose neopentyl glycol)]. This is a notable feature of the TTGs as glucoside detergents tend to be inferior to maltoside detergents at stabilizing membrane proteins. The favorable behavior of the TTGs for membrane protein stability is likely due to the high hydrophobicity of the lipophilic groups, an optimal range of hydrophilic-lipophilic balance, and the absence of cis-trans isomerism.
Collapse
Affiliation(s)
- Lubna Ghani
- Department
of Bionano Engineering, Hanyang University, Ansan 155-88, South Korea
| | - Xiang Zhang
- Tsinghua-Peking
Center for Life Sciences, Beijing Frontier Research Center for Biological
Structure, Beijing Advanced Innovation Center for Structural Biology,
School of Medicine, School of Pharmaceutical Sciences, Tsinghua University, Beijing 100084, China
| | - Chastine F. Munk
- Department
of Neuroscience, University of Copenhagen, Copenhagen DK-2200, Denmark
| | - Parameswaran Hariharan
- Department
of Cell Physiology and Molecular Biophysics, Center for Membrane Protein
Research, School of Medicine, Texas Tech
University Health Sciences Center, Lubbock, Texas 79430, United States
| | - Baoliang Lan
- Tsinghua-Peking
Center for Life Sciences, Beijing Frontier Research Center for Biological
Structure, Beijing Advanced Innovation Center for Structural Biology,
School of Medicine, School of Pharmaceutical Sciences, Tsinghua University, Beijing 100084, China
| | - Hong Sik Yun
- Department
of Bionano Engineering, Hanyang University, Ansan 155-88, South Korea
| | - Bernadette Byrne
- Department
of Life Sciences, Imperial College London, London SW7 2AZ, U.K.
| | - Lan Guan
- Department
of Cell Physiology and Molecular Biophysics, Center for Membrane Protein
Research, School of Medicine, Texas Tech
University Health Sciences Center, Lubbock, Texas 79430, United States
| | - Claus J. Loland
- Department
of Neuroscience, University of Copenhagen, Copenhagen DK-2200, Denmark
| | - Xiangyu Liu
- Tsinghua-Peking
Center for Life Sciences, Beijing Frontier Research Center for Biological
Structure, Beijing Advanced Innovation Center for Structural Biology,
School of Medicine, School of Pharmaceutical Sciences, Tsinghua University, Beijing 100084, China
| | - Pil Seok Chae
- Department
of Bionano Engineering, Hanyang University, Ansan 155-88, South Korea
| |
Collapse
|
8
|
Brown KA, Gugger MK, Roberts DS, Moreno D, Chae PS, Ge Y, Jin S. Synthesis, Self-Assembly Properties, and Degradation Characterization of a Nonionic Photocleavable Azo-Sulfide Surfactant Family. Langmuir 2023; 39:1465-1473. [PMID: 36638323 PMCID: PMC10164600 DOI: 10.1021/acs.langmuir.2c02820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
We report the synthesis and characterization of a new family of maltose-derived nonionic surfactants that contain a photocleavable azo-sulfide linker (mAzo). The self-assembly properties of these surfactants were investigated using surface tension measurements to determine the critical micelle concentration (CMC), dynamic light scattering (DLS) to reveal the hydrodynamic radius of their self-assemblies, and transmission electron microscopy (TEM) to elucidate the micelle morphology. Ultraviolet-visible (UV-visible) spectroscopy confirmed the rapid photodegradation of these surfactants, but surface tension measurements of the surfactant solutions before and after degradation showed unusual degradation products. The photodegradation process was further studied using online liquid chromatography coupled with mass spectrometry (LC-MS),which revealed that these surfactants can form another photo-stable surfactant post-degradation. Finally, traditionally challenging proteins from heart tissue were solubilized using the mAzo surfactants to demonstrate their potential in biological applications.
Collapse
Affiliation(s)
- Kyle A. Brown
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin, 53706, USA
- Department of Surgery, University of Wisconsin-Madison, Madison, Wisconsin, 53706, USA
| | - Morgan K. Gugger
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin, 53706, USA
| | - David S. Roberts
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin, 53706, USA
| | - David Moreno
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin, 53706, USA
| | - Pil Seok Chae
- Department of Bionano Engineering, Hanyang University, Ansan, 15588, South Korea
| | - Ying Ge
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin, 53706, USA
- Department of Cell and Regenerative Biology, University of Wisconsin-Madison, Madison, Wisconsin, 53705, USA
- Human Proteomics Program, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, Wisconsin, 53705, USA
| | - Song Jin
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin, 53706, USA
| |
Collapse
|
9
|
Ahmed W, Sadaf A, Chae PS. Efficient and environmentally-friendly access to 4,5-unsaturated sulfonamides through a ligand-free copper-BF3-catalyzed three-component alkene carbo-sulfonamidation. Org Chem Front 2023. [DOI: 10.1039/d3qo00268c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
Abstract
Though sulfonamides are biologically important molecules, the scope of their structures is narrow due to the limited methods available for synthesis. Alkene functionalization has recently gained attention for synthesis of...
Collapse
|
10
|
Lee HS, Das M, Mahler F, Ahmed W, Wang H, Mortensen JS, Hariharan P, Ghani L, Byrne B, Guan L, Loland CJ, Keller S, Chae PS. 3,4-Bis(hydroxymethyl)hexane-1,6-diol-based maltosides (HDMs) for membrane-protein study: Importance of detergent rigidity-flexibility balance in protein stability. Chem Asian J 2022; 17:e202200941. [PMID: 36253323 DOI: 10.1002/asia.202200941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 10/14/2022] [Indexed: 11/07/2022]
Abstract
Detergents have been major contributors to membrane-protein structural study for decades. However, membrane proteins solubilized in conventional detergents tend to aggregate or denature over time. Stability of large eukaryotic membrane proteins with complex structures tends to be worse, necessitating development of novel detergents with improved properties. Here, we prepared a novel class of detergents, designated 3,4-bis(hydroxymethyl)hexane-1,6-diol-based maltosides (HDMs). When tested on three membrane proteins, including two G-protein-coupled receptors (GPCRs), the new detergents displayed significantly better behaviors compared with DDM. Moreover, the HDMs were superior or comparable to LMNG, an amphiphile widely used for GPCR structural study. An optimal balance of detergent rigidity vs. flexibility of the HDMs is likely responsible for their favorable behaviors toward membrane-protein stability. Thus, the current study not only introduces the HDMs, with significant potential for membrane-protein structural study, but also suggests a useful guideline for designing novel detergents for membrane-protein research.
Collapse
Affiliation(s)
- Hyun Sung Lee
- Hanyang University - ERICA Campus: Hanyang University - Ansan Campus, Bionanotechnology, 55, Hanyangdaehak-ro, Sangnok-gu, the 1st engineering building # 232, 15588, Ansan-si, KOREA, REPUBLIC OF
| | - Manabendra Das
- Technische Universitat Kaiserslautern, Molecular Biophysics, GERMANY
| | - Florian Mahler
- Technische Universitat Kaiserslautern, Molecular Biophysics, GERMANY
| | - Waqar Ahmed
- Hanyang University - ERICA Campus: Hanyang University - Ansan Campus, Bionano Technology, KOREA, REPUBLIC OF
| | - Haoqing Wang
- Stanford University, Molecular and Cellular Physiology, UNITED STATES
| | - Jonas S Mortensen
- University of Copenhagen: Kobenhavns Universitet, Neuroscience, DENMARK
| | - Parameswaran Hariharan
- Texas Tech University Health Sciences Center School of Medicine - Lubbock Campus: Texas Tech University Health Sciences Center School of Medicine, Cell Physiology and Molecular Biophysics, UNITED STATES
| | - Lubna Ghani
- Hanyang University - ERICA Campus: Hanyang University - Ansan Campus, Bionano Technology, KOREA, REPUBLIC OF
| | | | - Lan Guan
- Texas Tech University Health Sciences Center School of Medicine - Lubbock Campus: Texas Tech University Health Sciences Center School of Medicine, Cell Physiology and Molecular Biophysics, UNITED STATES
| | - Claus J Loland
- University of Copenhagen: Kobenhavns Universitet, Neuroscience, DENMARK
| | - Sandro Keller
- University of Graz: Karl-Franzens-Universitat Graz, Biophysics, AUSTRIA
| | - Pil Seok Chae
- Hanyang University, Department of Bionano Engineering, 55 Hanyangdaehak-ro, 15588, Ansan, KOREA, REPUBLIC OF
| |
Collapse
|
11
|
Abstract
Detergents are widely used for membrane protein structural study. Many recently developed detergents contain multiple tail and head groups, which are typically connected via a small and branched linker. Due to their inherent compact structures, with small inter-alkyl chain distances, these detergents form micelles with high alkyl chain density in the interiors, a feature favorably associated with membrane protein stability. A recent study on tandem triazine maltosides (TZM) revealed a distinct trend; despite possession of an apparently large inter-alkyl chain distance, the TZM-Es were highly effective at stabilizing membrane proteins. Thanks to the incorporation of a flexible spacer between the two triazine rings in the linker region, these detergents are prone to folding into a compact architecture in micellar environments instead of adopting an extended conformation. Detergent foldability represents a new concept of novel detergent design with significant potential for future detergent development.
Collapse
Affiliation(s)
- Taeyeol Youn
- Hanyang University - ERICA Campus: Hanyang University - Ansan Campus, Bionano Engineering, KOREA, REPUBLIC OF
| | - Soyoung Yoon
- Hanyang University - ERICA Campus: Hanyang University - Ansan Campus, Bionano Engineering, KOREA, REPUBLIC OF
| | - Bernadette Byrne
- Imperial College London, Department of Life Sciences, UNITED KINGDOM
| | - Pil Seok Chae
- Hanyang University, Department of Bionano Engineering, 55 Hanyangdaehak-ro, 15588, Ansan, KOREA, REPUBLIC OF
| |
Collapse
|
12
|
Lee HJ, Ehsan M, Zhang X, Katsube S, Munk CF, Wang H, Ahmed W, Kumar A, Byrne B, Loland CJ, Guan L, Liu X, Chae PS. Development of 1,3-acetonedicarboxylate-derived glucoside amphiphiles (ACAs) for membrane protein study. Chem Sci 2022; 13:5750-5759. [PMID: 35694361 PMCID: PMC9116450 DOI: 10.1039/d2sc00539e] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Accepted: 04/02/2022] [Indexed: 12/31/2022] Open
Abstract
Detergents are extensively used for membrane protein manipulation. Membrane proteins solubilized in conventional detergents are prone to denaturation and aggregation, rendering downstream characterization of these bio-macromolecules difficult. Although many amphiphiles have been developed to overcome the limited efficacy of conventional detergents for protein stabilization, only a handful of novel detergents have so far proved useful for membrane protein structural studies. Here, we introduce 1,3-acetonedicarboxylate-derived amphiphiles (ACAs) containing three glucose units and two alkyl chains as head and tail groups, respectively. The ACAs incorporate two different patterns of alkyl chain attachment to the core detergent unit, generating two sets of amphiphiles: ACA-As (asymmetrically alkylated) and ACA-Ss (symmetrically alkylated). The difference in the attachment pattern of the detergent alkyl chains resulted in minor variation in detergent properties such as micelle size, critical micelle concentration, and detergent behaviors toward membrane protein extraction and stabilization. In contrast, the impact of the detergent alkyl chain length on protein stability was marked. The two C11 variants (ACA-AC11 and ACA-SC11) were most effective at stabilizing the tested membrane proteins. The current study not only introduces new glucosides as tools for membrane protein study, but also provides detergent structure–property relationships important for future design of novel amphiphiles. Newly developed amphiphiles, designated ACAs, are not only efficient at extracting G protein-coupled receptors from the membranes, but also conferred enhanced stability to the receptors compared to the gold standards (DDM and LMNG).![]()
Collapse
Affiliation(s)
- Ho Jin Lee
- Department of Bionano Engineering, Hanyang University Ansan 155-88 Korea
| | - Muhammad Ehsan
- Department of Bionano Engineering, Hanyang University Ansan 155-88 Korea
| | - Xiang Zhang
- Beijing Advanced Innovation Center for Structural Biology, School of Medicine, School of Pharmaceutical Sciences, Tsinghua University 100084 Beijing China
| | - Satoshi Katsube
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center Lubbock TX 79430 USA
| | - Chastine F Munk
- Department of Neuroscience, University of Copenhagen Copenhagen DK-2200 Denmark
| | - Haoqing Wang
- Department of Molecular and Cellular Physiology, Stanford University California 94305 USA
| | - Waqar Ahmed
- Department of Bionano Engineering, Hanyang University Ansan 155-88 Korea
| | - Ashwani Kumar
- Department of Bionano Engineering, Hanyang University Ansan 155-88 Korea
| | - Bernadette Byrne
- Department of Life Sciences, Imperial College London London SW7 2AZ UK
| | - Claus J Loland
- Department of Neuroscience, University of Copenhagen Copenhagen DK-2200 Denmark
| | - Lan Guan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center Lubbock TX 79430 USA
| | - Xiangyu Liu
- Beijing Advanced Innovation Center for Structural Biology, School of Medicine, School of Pharmaceutical Sciences, Tsinghua University 100084 Beijing China
| | - Pil Seok Chae
- Department of Bionano Engineering, Hanyang University Ansan 155-88 Korea
| |
Collapse
|
13
|
Kumar A, Seok Chae P. A bis(fluorenyl-triazole)-conjugated naphthoquinoline-dione probe for a cascade detection of Cu2+ and F− and its logic circuit with a memory unit. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.114048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
14
|
Ghani L, Kim S, Wang H, Lee HS, Mortensen JS, Katsube S, Du Y, Sadaf A, Ahmed W, Byrne B, Guan L, Loland CJ, Kobilka BK, Im W, Chae PS. Foldable Detergents for Membrane Protein Study: Importance of Detergent Core Flexibility in Protein Stabilization. Chemistry 2022; 28:e202200116. [PMID: 35238091 PMCID: PMC9007890 DOI: 10.1002/chem.202200116] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Indexed: 12/30/2022]
Abstract
Membrane proteins are of biological and pharmaceutical significance. However, their structural study is extremely challenging mainly due to the fact that only a small number of chemical tools are suitable for stabilizing membrane proteins in solution. Detergents are widely used in membrane protein study, but conventional detergents are generally poor at stabilizing challenging membrane proteins such as G protein-coupled receptors and protein complexes. In the current study, we prepared tandem triazine-based maltosides (TZMs) with two amphiphilic triazine units connected by different diamine linkers, hydrazine (TZM-Hs) and 1,2-ethylenediamine (TZM-Es). These TZMs were consistently superior to a gold standard detergent (DDM) in terms of stabilizing a few membrane proteins. In addition, the TZM-Es containing a long linker showed more general protein stabilization efficacy with multiple membrane proteins than the TZM-Hs containing a short linker. This result indicates that introduction of the flexible1,2-ethylenediamine linker between two rigid triazine rings enables the TZM-Es to fold into favourable conformations in order to promote membrane protein stability. The novel concept of detergent foldability introduced in the current study has potential in rational detergent design and membrane protein applications.
Collapse
Affiliation(s)
- Lubna Ghani
- Department of Bionano Engineering, Center for Bionano Intelligence Education and Research, Hanyang University, Ansan, 155-88, South Korea
| | - Seonghoon Kim
- School of Computational Sciences, Korea Institute for Advanced Study, Seoul, 024-55, South Korea
| | - Haoqing Wang
- Molecular and Cellular Physiology, Stanford University, Stanford, CA 94305, USA
| | - Hyun Sung Lee
- Department of Bionano Engineering, Center for Bionano Intelligence Education and Research, Hanyang University, Ansan, 155-88, South Korea
| | - Jonas S Mortensen
- Department of Neuroscience, University of Copenhagen, Copenhagen, 2200, Denmark
| | - Satoshi Katsube
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
| | - Yang Du
- Molecular and Cellular Physiology, Stanford University, Stanford, CA 94305, USA.,Current address: School of Life and Health Sciences, Chinese University of Hong Kong, 2001 Longxiang Ave, Shenzhen, Guangdong, 518172, China
| | - Aiman Sadaf
- Department of Bionano Engineering, Center for Bionano Intelligence Education and Research, Hanyang University, Ansan, 155-88, South Korea
| | - Waqar Ahmed
- Department of Bionano Engineering, Center for Bionano Intelligence Education and Research, Hanyang University, Ansan, 155-88, South Korea
| | - Bernadette Byrne
- Department of Life Sciences, Imperial College London, London, SW7 2AZ, UK
| | - Lan Guan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
| | - Claus J Loland
- Department of Neuroscience, University of Copenhagen, Copenhagen, 2200, Denmark
| | - Brian K Kobilka
- Molecular and Cellular Physiology, Stanford University, Stanford, CA 94305, USA
| | - Wonpil Im
- Department of Biological Sciences, Chemistry, and Bioengineering, Lehigh University, Bethlehem, PA 18015, USA
| | - Pil Seok Chae
- Department of Bionano Engineering, Center for Bionano Intelligence Education and Research, Hanyang University, Ansan, 155-88, South Korea
| |
Collapse
|
15
|
|
16
|
Ehsan M, Wang H, Katsube S, Munk CF, Du Y, Youn T, Yoon S, Byrne B, Loland CJ, Guan L, Kobilka BK, Chae PS. Glyco-steroidal amphiphiles (GSAs) for membrane protein structural study. Chembiochem 2022; 23:e202200027. [PMID: 35129249 PMCID: PMC8986615 DOI: 10.1002/cbic.202200027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 02/05/2022] [Indexed: 11/08/2022]
Abstract
Integral membrane proteins pose considerable challenges to high resolution structural analysis. Maintaining membrane proteins in their native state during protein isolation is essential for structural study of these bio-macromolecules. Detergents are the most commonly used amphiphilic compounds for stabilizing membrane proteins in solution outside a lipid bilayer. We previously introduced a glyco-diosgenin (GDN) detergent that was shown to be highly effective at stabilizing a wide range of membrane proteins. This steroidal detergent has additionally gained attention due to its compatibility with membrane protein structure study via cryo-EM. However, synthetic inconvenience limits widespread use of GDN in membrane protein study. To improve its synthetic accessibility and to further enhance detergent efficacy for protein stabilization, we designed a new class of glyco-steroid-based detergents using three steroid units: cholestanol, cholesterol and diosgenin. These new detergents were efficiently prepared and showed marked efficacy for protein stabilization in evaluation with a few model membrane proteins including two G protein-coupled receptors. Some new agents were not only superior to a gold standard detergent, DDM, but were also more effective than the original GDN at preserving protein integrity long term. These agents represent valuable alternatives to GDN, and are likely to facilitate structural determination of challenging membrane proteins.
Collapse
Affiliation(s)
- Muhammad Ehsan
- Hanyang University, Department of Bionano Engineering, KOREA, REPUBLIC OF
| | - Haoqing Wang
- Stanford University, Department of Molecular and Cellular Physiology, UNITED STATES
| | - Satoshi Katsube
- Texas Tech University, Department of Cell Physiology and Molecular Biophysics, UNITED STATES
| | - Chastine F Munk
- University of Copenhagen: Kobenhavns Universitet, Department of Neuroscience, DENMARK
| | - Yang Du
- Stanford University, Department of Molecular and Cellular Physiology, UNITED STATES
| | - Taeyeol Youn
- Hanyang University, Department of Bionano Engineering, KOREA, REPUBLIC OF
| | - Soyoung Yoon
- Hanyang University, Department of Bionano Engineering, KOREA, REPUBLIC OF
| | - Bernadette Byrne
- Imperial College London, Department of Life Sciences, UNITED KINGDOM
| | - Claus J Loland
- University of Copenhagen: Kobenhavns Universitet, Department of Neurosciences, DENMARK
| | - Lan Guan
- Texas Tech University, Department of Cell Physiology and Molecular Biophysics, UNITED STATES
| | - Brian K Kobilka
- Stanford University, Department of Molecular and Cellular Physiology, UNITED STATES
| | - Pil Seok Chae
- Hanyang University, Department of Bionano Engineering, 55 Hanyangdaehak-ro, 426-791, Ansan, KOREA, REPUBLIC OF
| |
Collapse
|
17
|
Kumar A, Kumar S, Chae PS. A Chromo-Fluorogenic Naphthoquinolinedione-Based Probe for Dual Detection of Cu 2+ and Its Use for Various Water Samples. Molecules 2022; 27:molecules27030785. [PMID: 35164050 PMCID: PMC8838320 DOI: 10.3390/molecules27030785] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 01/13/2022] [Accepted: 01/21/2022] [Indexed: 11/18/2022]
Abstract
The presence of an abnormal amount of Cu2+ in the human body causes various health issues. In the current study, we synthesized a new naphthoquinolinedione-based probe (probe 1) to monitor Cu2+ in different water systems, such as tap water, lakes, and drain water. Two triazole units were introduced into the probe via a click reaction to increase the binding affinity to a metal ion. In day-light, probe 1 dissolved in a mixed solvent system (HEPES: EtOH = 1:4) showed a vivid color change from light greenish-yellow to pink in the presence of only Cu2+ among various metal ions. In addition, the green luminescence and fluorescence emission of the probe were effectively bleached out immediately after Cu2+ addition. The limit of detection (LOD) of the probe was 0.5 µM when a ratio-metric method was used for metal ion detection. The fluorescence titration data of the probe with Cu2+ showed a calculated LOD of 41.5 pM. Hence, probe 1 possesses the following dual response toward Cu2+ detection: color change and fluorescence quenching. Probe 1 was also useful for detecting Cu2+ spiked in tap/lake water as well as the cytoplasm of live HeLa cells. The current system was investigated using ultraviolet-visible and fluorescence spectroscopy as well as density functional theory calculations (DFT).
Collapse
Affiliation(s)
- Ashwani Kumar
- Department of Bionano Engineering, Hanyang University, Ansan 15588, Korea
- Correspondence: (A.K.); (P.S.C.)
| | - Subodh Kumar
- Department of Chemistry, UGC Center for Advanced Studies, Guru Nanak Dev University, Amritsar 143005, India;
| | - Pil Seok Chae
- Department of Bionano Engineering, Hanyang University, Ansan 15588, Korea
- Correspondence: (A.K.); (P.S.C.)
| |
Collapse
|
18
|
Ehsan M, Wang H, Cecchetti C, Mortensen JS, Du Y, Hariharan P, Nygaard A, Lee HJ, Ghani L, Guan L, Loland CJ, Byrne B, Kobilka BK, Chae PS. Maltose-bis(hydroxymethyl)phenol (MBPs) and Maltose-tris(hydroxymethyl)phenol (MTPs) Amphiphiles for Membrane Protein Stability. ACS Chem Biol 2021; 16:1779-1790. [PMID: 34445864 DOI: 10.1021/acschembio.1c00578] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Membrane protein structures provide a fundamental understanding of their molecular actions and are of importance for drug development. Detergents are widely used to solubilize, stabilize, and crystallize membrane proteins, but membrane proteins solubilized in conventional detergents are prone to denaturation and aggregation. Thus, developing novel detergents with enhanced efficacy for protein stabilization remains important. We report herein the design and synthesis of a class of phenol-derived maltoside detergents. Using two different linkers, we prepared two sets of new detergents, designated maltose-bis(hydroxymethyl)phenol (MBPs) and maltose-tris(hydroxymethyl)phenol (MTPs). The evaluation of these detergents with three transporters and two G-protein coupled receptors allowed us to identify a couple of new detergents (MBP-C9 and MTP-C12) that consistently conferred enhanced stability to all tested proteins compared to a gold standard detergent (DDM). Furthermore, the data analysis based on the detergent structures provides key detergent features responsible for membrane protein stabilization that together will facilitate the future design of novel detergents.
Collapse
Affiliation(s)
- Muhammad Ehsan
- Department of Bionano Engineering, Center for Bionano Intelligence Education and Research, Hanyang University, Ansan 155-88, South Korea
| | - Haoqing Wang
- Department of Molecular and Cellular Physiology, Stanford University, California 94305, United States
| | - Cristina Cecchetti
- Department of Life Sciences, Imperial College London, London, SW7 2AZ, United Kingdom
| | - Jonas S. Mortensen
- Department of Neuroscience, University of Copenhagen, DK-2200, Copenhagen, Denmark
| | - Yang Du
- Department of Molecular and Cellular Physiology, Stanford University, California 94305, United States
| | - Parameswaran Hariharan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, Texas 79430, United States
| | - Andreas Nygaard
- Department of Neuroscience, University of Copenhagen, DK-2200, Copenhagen, Denmark
| | - Ho Jin Lee
- Department of Bionano Engineering, Center for Bionano Intelligence Education and Research, Hanyang University, Ansan 155-88, South Korea
| | - Lubna Ghani
- Department of Bionano Engineering, Center for Bionano Intelligence Education and Research, Hanyang University, Ansan 155-88, South Korea
| | - Lan Guan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, Texas 79430, United States
| | - Claus J. Loland
- Department of Neuroscience, University of Copenhagen, DK-2200, Copenhagen, Denmark
| | - Bernadette Byrne
- Department of Life Sciences, Imperial College London, London, SW7 2AZ, United Kingdom
| | - Brian K. Kobilka
- Department of Molecular and Cellular Physiology, Stanford University, California 94305, United States
| | - Pil Seok Chae
- Department of Bionano Engineering, Center for Bionano Intelligence Education and Research, Hanyang University, Ansan 155-88, South Korea
| |
Collapse
|
19
|
Das M, Mahler F, Hariharan P, Wang H, Du Y, Mortensen JS, Patallo EP, Ghani L, Glück D, Lee HJ, Byrne B, Loland CJ, Guan L, Kobilka BK, Keller S, Chae PS. Diastereomeric Cyclopentane-Based Maltosides (CPMs) as Tools for Membrane Protein Study. J Am Chem Soc 2020; 142:21382-21392. [PMID: 33315387 DOI: 10.1021/jacs.0c09629] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Amphiphilic agents, called detergents, are invaluable tools for studying membrane proteins. However, membrane proteins encapsulated by conventional head-to-tail detergents tend to denature or aggregate, necessitating the development of structurally distinct molecules with improved efficacy. Here, a novel class of diastereomeric detergents with a cyclopentane core unit, designated cyclopentane-based maltosides (CPMs), were prepared and evaluated for their ability to solubilize and stabilize several model membrane proteins. A couple of CPMs displayed enhanced behavior compared with the benchmark conventional detergent, n-dodecyl-β-d-maltoside (DDM), for all the tested membrane proteins including two G-protein-coupled receptors (GPCRs). Furthermore, CPM-C12 was notable for its ability to confer enhanced membrane protein stability compared with the previously developed conformationally rigid NBMs [J. Am. Chem. Soc. 2017, 139, 3072] and LMNG. The effect of the individual CPMs on protein stability varied depending on both the detergent configuration (cis/trans) and alkyl chain length, allowing us draw conclusions on the detergent structure-property-efficacy relationship. Thus, this study not only provides novel detergent tools useful for membrane protein research but also reports on structural features of the detergents critical for detergent efficacy in stabilizing membrane proteins.
Collapse
Affiliation(s)
- Manabendra Das
- Department of Bionanotechnology, Center for Bionano Intelligence Education and Research, Hanyang University, Ansan 155-88, Korea.,Technische Universität Kaiserslautern (TUK), Erwin-Schrödinger-Str. 13, 67663 Kaiserslautern, Germany
| | - Florian Mahler
- Technische Universität Kaiserslautern (TUK), Erwin-Schrödinger-Str. 13, 67663 Kaiserslautern, Germany
| | - Parameswaran Hariharan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, Texas 79430, United States
| | - Haoqing Wang
- Department of Molecular and Cellular Physiology, Stanford University, Stanford, California 94305, United States
| | - Yang Du
- Department of Molecular and Cellular Physiology, Stanford University, Stanford, California 94305, United States
| | - Jonas S Mortensen
- Department of Neuroscience, University of Copenhagen, Copenhagen DK-2200, Denmark
| | - Eugenio Pérez Patallo
- Technische Universität Kaiserslautern (TUK), Erwin-Schrödinger-Str. 13, 67663 Kaiserslautern, Germany
| | - Lubna Ghani
- Department of Bionanotechnology, Center for Bionano Intelligence Education and Research, Hanyang University, Ansan 155-88, Korea
| | - David Glück
- Technische Universität Kaiserslautern (TUK), Erwin-Schrödinger-Str. 13, 67663 Kaiserslautern, Germany
| | - Ho Jin Lee
- Department of Bionanotechnology, Center for Bionano Intelligence Education and Research, Hanyang University, Ansan 155-88, Korea
| | - Bernadette Byrne
- Department of Life Sciences, Imperial College London, London SW7 2AZ, United Kingdom
| | - Claus J Loland
- Department of Neuroscience, University of Copenhagen, Copenhagen DK-2200, Denmark
| | - Lan Guan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, Texas 79430, United States
| | - Brian K Kobilka
- Department of Molecular and Cellular Physiology, Stanford University, Stanford, California 94305, United States
| | - Sandro Keller
- Technische Universität Kaiserslautern (TUK), Erwin-Schrödinger-Str. 13, 67663 Kaiserslautern, Germany.,Institute of Molecular Biosciences (IMB), NAWI Graz, University of Graz, Humboldtstr. 50/III, 8010 Graz, Austria.,Field of Excellence BioHealth, University of Graz, 8010 Graz, Austria.,BioTechMed-Graz, Graz, Austria
| | - Pil Seok Chae
- Department of Bionanotechnology, Center for Bionano Intelligence Education and Research, Hanyang University, Ansan 155-88, Korea
| |
Collapse
|
20
|
Bae HE, Cecchetti C, Du Y, Katsube S, Mortensen JS, Huang W, Rehan S, Lee HJ, Loland CJ, Guan L, Kobilka BK, Byrne B, Chae PS. Pendant-bearing glucose-neopentyl glycol (P-GNG) amphiphiles for membrane protein manipulation: Importance of detergent pendant chain for protein stabilization. Acta Biomater 2020; 112:250-261. [PMID: 32522715 DOI: 10.1016/j.actbio.2020.06.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 05/31/2020] [Accepted: 06/02/2020] [Indexed: 12/15/2022]
Abstract
Glucoside detergents are successfully used for membrane protein crystallization mainly because of their ability to form small protein-detergent complexes. In a previous study, we introduced glucose neopentyl glycol (GNG) amphiphiles with a branched diglucoside structure that has facilitated high resolution crystallographic structure determination of several membrane proteins. Like other glucoside detergents, however, these GNGs were less successful than DDM in stabilizing membrane proteins, limiting their wide use in protein structural study. As a strategy to improve GNG efficacy for protein stabilization, we introduced two different alkyl chains (i.e., main and pendant chains) into the GNG scaffold while maintaining the branched diglucoside head group. Of these pendant-bearing GNGs (P-GNGs), three detergents (GNG-2,14, GNG-3,13 and GNG-3,14) were not only notably better than both DDM (a gold standard detergent) and the previously described GNGs at stabilizing all six membrane proteins tested here, but were also as efficient as DDM at membrane protein extraction. The results suggest that the C14 main chain of the P-GNGs is highly compatible with the hydrophobic widths of membrane proteins, while the C2/C3 pendant chain is effective at strengthening detergent hydrophobic interactions. Based on the marked effect on protein stability and solubility, these glucoside detergents hold significant potential for membrane protein structural study. Furthermore, the independent roles of the detergent two alkyl chains first introduced in this study have shed light on new amphiphile design for membrane protein study. STATEMENT OF SIGNIFICANCE: Detergent efficacy for protein stabilization tends to be protein-specific, thus it is challenging to find a detergent that is effective at stabilizing multiple membrane proteins. By incorporating a pendant chain into our previous GNG scaffold, we prepared pendant chain-bearing GNGs (P-GNGs) and identified three P-GNGs that were highly effective at stabilizing all membrane proteins tested here including two GPCRs. In addition, the new detergents were as efficient as DDM at extracting membrane proteins, enabling use of these detergents over the multiple steps of protein isolation. The key difference between the P-GNGs and other glucoside detergents, the presence of a pendant chain, is likely to be responsible for their markedly enhanced protein stabilization behavior.
Collapse
Affiliation(s)
- Hyoung Eun Bae
- Department of Bionanotechnology, Hanyang University, Ansan, 15588 (Korea)
| | - Cristina Cecchetti
- Department of Life Sciences, Imperial College London, London, SW7 2AZ (UK)
| | - Yang Du
- Department of Molecular and Cellular Physiology, Stanford University, CA 94305 (USA)
| | - Satoshi Katsube
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79430 (USA)
| | - Jonas S Mortensen
- Department of Neuroscience, University of Copenhagen, Copenhagen, DK-2200 (Denmark)
| | - Weijiao Huang
- Department of Molecular and Cellular Physiology, Stanford University, CA 94305 (USA)
| | - Shahid Rehan
- Institute of Biotechnology, University of Helsinki, Helsinki (Finland); HiLIFE, University of Helsinki, Helsinki (Finland)
| | - Ho Jin Lee
- Department of Bionanotechnology, Hanyang University, Ansan, 15588 (Korea)
| | - Claus J Loland
- Department of Neuroscience, University of Copenhagen, Copenhagen, DK-2200 (Denmark)
| | - Lan Guan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79430 (USA)
| | - Brian K Kobilka
- Department of Molecular and Cellular Physiology, Stanford University, CA 94305 (USA)
| | - Bernadette Byrne
- Department of Life Sciences, Imperial College London, London, SW7 2AZ (UK)
| | - Pil Seok Chae
- Department of Bionanotechnology, Hanyang University, Ansan, 15588 (Korea).
| |
Collapse
|
21
|
Ehsan M, Katsube S, Cecchetti C, Du Y, Mortensen JS, Wang H, Nygaard A, Ghani L, Loland CJ, Kobilka BK, Byrne B, Guan L, Chae PS. New Malonate-Derived Tetraglucoside Detergents for Membrane Protein Stability. ACS Chem Biol 2020; 15:1697-1707. [PMID: 32501004 DOI: 10.1021/acschembio.0c00316] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Membrane proteins are widely studied in detergent micelles, a membrane-mimetic system formed by amphiphilic compounds. However, classical detergents have serious limitations in their utility, particularly for unstable proteins such as eukaryotic membrane proteins and membrane protein complexes, and thus, there is an unmet need for novel amphiphiles with enhanced ability to stabilize membrane proteins. Here, we developed a new class of malonate-derived detergents with four glucosides, designated malonate-derived tetra-glucosides (MTGs), and compared these new detergents with previously reported octyl glucose neopentyl glycol (OGNG) and n-dodecyl-β-d-maltoside (DDM). When tested with two G-protein coupled receptors (GPCRs) and three transporters, a couple of MTGs consistently conferred enhanced stability to all tested proteins compared to DDM and OGNG. As a result of favorable behaviors for a range of membrane proteins, these MTGs have substantial potential for membrane protein research. This study additionally provides a new detergent design principle based on the effect of a polar functional group (i.e., ether) on protein stability depending on its position in the detergent scaffold.
Collapse
Affiliation(s)
- Muhammad Ehsan
- Department of Bionanotechnology, Hanyang University, Ansan, 15588, Korea
| | - Satoshi Katsube
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, Texas 79430, United States
| | - Cristina Cecchetti
- Department of Life Sciences, Imperial College London, London, SW7 2AZ, United Kingdom
| | - Yang Du
- School of Life and Health Sciences, Kobilka Institute of Innovative Drug Discovery, Chinese University of Hong Kong, 2001 Longxiang Avenue, Shenzhen, Guangdong 518172, China
| | - Jonas S. Mortensen
- Department of Neuroscience, University of Copenhagen, Copenhagen, DK-2200, Denmark
| | - Haoqing Wang
- Molecular and Cellular Physiology, Stanford University, Stanford, California 94305, United States
| | - Andreas Nygaard
- Department of Neuroscience, University of Copenhagen, Copenhagen, DK-2200, Denmark
| | - Lubna Ghani
- Department of Bionanotechnology, Hanyang University, Ansan, 15588, Korea
| | - Claus J. Loland
- Department of Neuroscience, University of Copenhagen, Copenhagen, DK-2200, Denmark
| | - Brian K. Kobilka
- Molecular and Cellular Physiology, Stanford University, Stanford, California 94305, United States
| | - Bernadette Byrne
- Department of Life Sciences, Imperial College London, London, SW7 2AZ, United Kingdom
| | - Lan Guan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, Texas 79430, United States
| | - Pil Seok Chae
- Department of Bionanotechnology, Hanyang University, Ansan, 15588, Korea
| |
Collapse
|
22
|
Choi B, Cha M, Eun GS, Lee DH, Lee S, Ehsan M, Chae PS, Heo WD, Park Y, Yoon TY. Single-molecule functional anatomy of endogenous HER2-HER3 heterodimers. eLife 2020; 9:53934. [PMID: 32267234 PMCID: PMC7176432 DOI: 10.7554/elife.53934] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Accepted: 04/07/2020] [Indexed: 12/14/2022] Open
Abstract
Human epidermal growth factor receptors (HERs) are the primary targets of many directed cancer therapies. However, the reason a specific dimer of HERs generates a stronger proliferative signal than other permutations remains unclear. Here, we used single-molecule immunoprecipitation to develop a biochemical assay for endogenously-formed, entire HER2-HER3 heterodimers. We observed unexpected, large conformational fluctuations in juxta-membrane and kinase domains of the HER2-HER3 heterodimer. Nevertheless, the individual HER2-HER3 heterodimers catalyze tyrosine phosphorylation at an unusually high rate, while simultaneously interacting with multiple copies of downstream signaling effectors. Our results suggest that the high catalytic rate and multi-tasking capability make a concerted contribution to the strong signaling potency of the HER2-HER3 heterodimers.
Collapse
Affiliation(s)
- Byoungsan Choi
- School of Biological Sciences and Institute for Molecular Biology and Genetics, Seoul National University, Seoul, Republic of Korea.,Department of Physics, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea
| | - Minkwon Cha
- Department of Physics, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea
| | - Gee Sung Eun
- School of Biological Sciences and Institute for Molecular Biology and Genetics, Seoul National University, Seoul, Republic of Korea
| | | | - Seul Lee
- Proteina Co. Ltd., Seoul, Republic of Korea
| | - Muhammad Ehsan
- Department of Bionanotechnology, Hanyang University, Ansan, Republic of Korea
| | - Pil Seok Chae
- Department of Bionanotechnology, Hanyang University, Ansan, Republic of Korea
| | - Won Do Heo
- Department of Biological Sciences, KAIST, Daejeon, Republic of Korea
| | - YongKeun Park
- Department of Physics, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea
| | - Tae-Young Yoon
- School of Biological Sciences and Institute for Molecular Biology and Genetics, Seoul National University, Seoul, Republic of Korea
| |
Collapse
|
23
|
Ghani L, Munk CF, Zhang X, Katsube S, Du Y, Cecchetti C, Huang W, Bae HE, Saouros S, Ehsan M, Guan L, Liu X, Loland CJ, Kobilka BK, Byrne B, Chae PS. 1,3,5-Triazine-Cored Maltoside Amphiphiles for Membrane Protein Extraction and Stabilization. J Am Chem Soc 2019; 141:19677-19687. [PMID: 31809039 DOI: 10.1021/jacs.9b07883] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Despite their major biological and pharmacological significance, the structural and functional study of membrane proteins remains a significant challenge. A main issue is the isolation of these proteins in a stable and functional state from native lipid membranes. Detergents are amphiphilic compounds widely used to extract membrane proteins from the native membranes and maintain them in a stable form during downstream analysis. However, due to limitations of conventional detergents, it is essential to develop novel amphiphiles with optimal properties for protein stability in order to advance membrane protein research. Here we designed and synthesized 1,3,5-triazine-cored dimaltoside amphiphiles derived from cyanuric chloride. By introducing variations in the alkyl chain linkage (ether/thioether) and an amine-functionalized diol linker (serinol/diethanolamine), we prepared two sets of 1,3,5-triazine-based detergents. When tested with several model membrane proteins, these agents showed remarkable efficacy in stabilizing three transporters and two G protein-coupled receptors. Detergent behavior substantially varied depending on the detergent structural variation, allowing us to explore detergent structure-property-efficacy relationships. The 1,3,5-triazine-based detergents introduced here have significant potential for membrane protein study as a consequence of their structural diversity and universal stabilization efficacy for several membrane proteins.
Collapse
Affiliation(s)
- Lubna Ghani
- Department of Bionanotechnology , Hanyang University , Ansan 155-88 , Korea
| | - Chastine F Munk
- Department of Neuroscience , University of Copenhagen , Copenhagen DK-2200 , Denmark
| | - Xiang Zhang
- Beijing Advanced Innovation Center for Structural Biology, School of Medicine, School of Pharmaceutical Sciences , Tsinghua University , 100084 Beijing , China
| | - Satoshi Katsube
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine , Texas Tech University Health Sciences Center , Lubbock , Texas 79430 , United States
| | - Yang Du
- Department of Molecular and Cellular Physiology , Stanford University , Stanford , California 94305 , United States
| | - Cristina Cecchetti
- Department of Life Sciences , Imperial College London , London , SW7 2AZ , United Kingdom
| | - Weijiao Huang
- Department of Molecular and Cellular Physiology , Stanford University , Stanford , California 94305 , United States
| | - Hyoung Eun Bae
- Department of Bionanotechnology , Hanyang University , Ansan 155-88 , Korea
| | - Savvas Saouros
- Department of Life Sciences , Imperial College London , London , SW7 2AZ , United Kingdom
| | - Muhammad Ehsan
- Department of Bionanotechnology , Hanyang University , Ansan 155-88 , Korea
| | - Lan Guan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine , Texas Tech University Health Sciences Center , Lubbock , Texas 79430 , United States
| | - Xiangyu Liu
- Beijing Advanced Innovation Center for Structural Biology, School of Medicine, School of Pharmaceutical Sciences , Tsinghua University , 100084 Beijing , China
| | - Claus J Loland
- Department of Neuroscience , University of Copenhagen , Copenhagen DK-2200 , Denmark
| | - Brian K Kobilka
- Department of Molecular and Cellular Physiology , Stanford University , Stanford , California 94305 , United States
| | - Bernadette Byrne
- Department of Life Sciences , Imperial College London , London , SW7 2AZ , United Kingdom
| | - Pil Seok Chae
- Department of Bionanotechnology , Hanyang University , Ansan 155-88 , Korea
| |
Collapse
|
24
|
Das M, Du Y, Mortensen JS, Ramos M, Ghani L, Lee HJ, Bae HE, Byrne B, Guan L, Loland CJ, Kobilka BK, Chae PS. Trehalose-cored amphiphiles for membrane protein stabilization: importance of the detergent micelle size in GPCR stability. Org Biomol Chem 2019; 17:3249-3257. [PMID: 30843907 DOI: 10.1039/c8ob03153c] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Despite their importance in biology and medicinal chemistry, structural and functional studies of membrane proteins present major challenges. To study diverse membrane proteins, it is crucial to have the correct detergent to efficiently extract and stabilize the proteins from the native membranes for biochemical/biophysical downstream analyses. But many membrane proteins, particularly eukaryotic ones, are recalcitrant to stabilization and/or crystallization with currently available detergents and thus there are major efforts to develop novel detergents with enhanced properties. Here, a novel class of trehalose-cored amphiphiles are introduced, with multiple alkyl chains and carbohydrates projecting from the trehalose core unit are introduced. A few members displayed enhanced protein stabilization behavior compared to the benchmark conventional detergent, n-dodecyl-β-d-maltoside (DDM), for multiple tested membrane proteins: (i) a bacterial leucine transporter (LeuT), (ii) the R. capsulatus photosynthetic superassembly, and (iii) the human β2 adrenergic receptor (β2AR). Due to synthetic convenience and their favourable behaviors for a range of membrane proteins, these agents have potential for membrane protein research. In addition, the detergent property-efficacy relationship discussed here will guide future design of novel detergents.
Collapse
Affiliation(s)
- Manabendra Das
- Department of Bionanotechnology, Hanyang University, Ansan, 155-88, Korea.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
25
|
Sadaf A, Ramos M, Mortensen JS, Du Y, Bae HE, Munk CF, Hariharan P, Byrne B, Kobilka BK, Loland CJ, Guan L, Chae PS. Conformationally Restricted Monosaccharide-Cored Glycoside Amphiphiles: The Effect of Detergent Headgroup Variation on Membrane Protein Stability. ACS Chem Biol 2019; 14:1717-1726. [PMID: 31305987 DOI: 10.1021/acschembio.9b00166] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Detergents are widely used to isolate membrane proteins from lipid bilayers, but many proteins solubilized in conventional detergents are structurally unstable. Thus, there is major interest in the development of novel amphiphiles to facilitate membrane protein research. In this study, we have designed and synthesized novel amphiphiles with a rigid scyllo-inositol core, designated scyllo-inositol glycosides (SIGs). Varying the headgroup structure allowed the preparation of three sets of SIGs that were evaluated for their effects on membrane protein stability. When tested with a few model membrane proteins, representative SIGs conferred enhanced stability to the membrane proteins compared to a gold standard conventional detergent (DDM). Of the novel amphiphiles, a SIG designated STM-12 was most effective at preserving the stability of the multiple membrane proteins tested here. In addition, a comparative study of the three sets suggests that several factors, including micelle size and alkyl chain length, need to be considered in the development of novel detergents for membrane protein research. Thus, this study not only describes new detergent tools that are potentially useful for membrane protein structural study but also introduces plausible correlations between the chemical properties of detergents and membrane protein stabilization efficacy.
Collapse
Affiliation(s)
- Aiman Sadaf
- Department of Bionanotechnology, Hanyang University, Ansan 155-88, Korea
| | - Manuel Ramos
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, Texas 79430, United States
| | - Jonas S. Mortensen
- Department of Neuroscience, University of Copenhagen, Copenhagen N DK-2200, Denmark
| | - Yang Du
- Department of Molecular and Cellular Physiology, Stanford University, Stanford, California 94305, United States
| | - Hyoung Eun Bae
- Department of Bionanotechnology, Hanyang University, Ansan 155-88, Korea
| | - Chastine F. Munk
- Department of Neuroscience, University of Copenhagen, Copenhagen N DK-2200, Denmark
| | - Parameswaran Hariharan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, Texas 79430, United States
| | - Bernadette Byrne
- Department of Life Sciences, Imperial College London, London SW7 2AZ, U.K
| | - Brian K. Kobilka
- Department of Molecular and Cellular Physiology, Stanford University, Stanford, California 94305, United States
| | - Claus J. Loland
- Department of Neuroscience, University of Copenhagen, Copenhagen N DK-2200, Denmark
| | - Lan Guan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, Texas 79430, United States
| | - Pil Seok Chae
- Department of Bionanotechnology, Hanyang University, Ansan 155-88, Korea
| |
Collapse
|
26
|
Ehsan M, Du Y, Mortensen JS, Hariharan P, Qu Q, Ghani L, Das M, Grethen A, Byrne B, Skiniotis G, Keller S, Loland CJ, Guan L, Kobilka BK, Chae PS. Self-Assembly Behavior and Application of Terphenyl-Cored Trimaltosides for Membrane-Protein Studies: Impact of Detergent Hydrophobic Group Geometry on Protein Stability. Chemistry 2019; 25:11545-11554. [PMID: 31243822 DOI: 10.1002/chem.201902468] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Indexed: 01/13/2023]
Abstract
Amphipathic agents are widely used in various fields including biomedical sciences. Micelle-forming detergents are particularly useful for in vitro membrane-protein characterization. As many conventional detergents are limited in their ability to stabilize membrane proteins, it is necessary to develop novel detergents to facilitate membrane-protein research. In the current study, we developed novel trimaltoside detergents with an alkyl pendant-bearing terphenyl unit as a hydrophobic group, designated terphenyl-cored maltosides (TPMs). We found that the geometry of the detergent hydrophobic group substantially impacts detergent self-assembly behavior, as well as detergent efficacy for membrane-protein stabilization. TPM-Vs, with a bent terphenyl group, were superior to the linear counterparts (TPM-Ls) at stabilizing multiple membrane proteins. The favorable protein stabilization efficacy of these bent TPMs is likely associated with a binding mode with membrane proteins distinct from conventional detergents and facial amphiphiles. When compared to n-dodecyl-β-d-maltoside (DDM), most TPMs were superior or comparable to this gold standard detergent at stabilizing membrane proteins. Notably, TPM-L3 was particularly effective at stabilizing the human β2 adrenergic receptor (β2 AR), a G-protein coupled receptor, and its complex with Gs protein. Thus, the current study not only provides novel detergent tools that are useful for membrane-protein study, but also suggests a critical role for detergent hydrophobic group geometry in governing detergent efficacy.
Collapse
Affiliation(s)
- Muhammad Ehsan
- Department of Bionanotechnology, Hanyang University, Ansan, 15588, Korea.,Current address: Department of Chemistry, Mirpur University of Science & Technology, Mirpur, AJK, 10250, Pakistan)
| | - Yang Du
- Molecular and Cellular Physiology, Stanford, CA, 94305, USA
| | - Jonas S Mortensen
- Department of Neuroscience, University of Copenhagen, 2200, Copenhagen, Denmark
| | - Parameswaran Hariharan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center Lubbock, TX, 79430, USA
| | - Qianhui Qu
- Molecular and Cellular Physiology and Structural Biology, Stanford University, Stanford, CA, 94305, USA
| | - Lubna Ghani
- Department of Bionanotechnology, Hanyang University, Ansan, 15588, Korea
| | - Manabendra Das
- Molecular Biophysics, Technische Universität Kaiserslautern (TUK), Erwin-Schrödinger-Str. 13, 67663, Kaiserslautern, Germany
| | - Anne Grethen
- Molecular Biophysics, Technische Universität Kaiserslautern (TUK), Erwin-Schrödinger-Str. 13, 67663, Kaiserslautern, Germany
| | - Bernadette Byrne
- Department of Life Sciences, Imperial College London, London, SW7 2AZ, UK
| | - Georgios Skiniotis
- Molecular and Cellular Physiology and Structural Biology, Stanford University, Stanford, CA, 94305, USA
| | - Sandro Keller
- Molecular Biophysics, Technische Universität Kaiserslautern (TUK), Erwin-Schrödinger-Str. 13, 67663, Kaiserslautern, Germany
| | - Claus J Loland
- Department of Neuroscience, University of Copenhagen, 2200, Copenhagen, Denmark
| | - Lan Guan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center Lubbock, TX, 79430, USA
| | | | - Pil Seok Chae
- Department of Bionanotechnology, Hanyang University, Ansan, 15588, Korea
| |
Collapse
|
27
|
Ehsan M, Kumar A, Mortensen JS, Du Y, Hariharan P, Kumar KK, Ha B, Byrne B, Guan L, Kobilka BK, Loland CJ, Chae PS. Self-Assembly Behaviors of a Penta-Phenylene Maltoside and Its Application for Membrane Protein Study. Chem Asian J 2019; 14:1926-1931. [PMID: 30969484 PMCID: PMC7239035 DOI: 10.1002/asia.201900224] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 03/22/2019] [Indexed: 01/07/2023]
Abstract
We prepared an amphiphile with a penta-phenylene lipophilic group and a branched trimaltoside head group. This new agent, designated penta-phenylene maltoside (PPM), showed a marked tendency to self-assembly into micelles via strong aromatic-aromatic interactions in aqueous media, as evidenced by 1 H NMR spectroscopy and fluorescence studies. When utilized for membrane protein studies, this new agent was superior to DDM, a gold standard conventional detergent, in stabilizing multiple proteins long term. The ability of this agent to form aromatic-aromatic interactions is likely responsible for enhanced protein stabilization when associated with a target membrane protein.
Collapse
Affiliation(s)
- Muhammad Ehsan
- Department of Bionanotechnology, Hanyang University, Ansan, 15588, Korea
- Current address: Department of Chemistry, Mirpur University of Science&Technology (MUST), Mirpur-, 10250 (AJK), Pakistan
| | - Ashwani Kumar
- Department of Bionanotechnology, Hanyang University, Ansan, 15588, Korea
| | - Jonas S Mortensen
- Department of Neuroscience, University of Copenhagen, 2200, Copenhagen, Denmark
| | - Yang Du
- Molecular and Cellular Physiology, Stanford University, Stanford, CA, 94305, USA
| | - Parameswaran Hariharan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center Lubbock, TX, 79430, USA
| | - Kaavya K Kumar
- Molecular and Cellular Physiology, Stanford University, Stanford, CA, 94305, USA
| | - Betty Ha
- Molecular and Cellular Physiology, Stanford University, Stanford, CA, 94305, USA
| | - Bernadette Byrne
- Department of Life Sciences, Imperial College London, London, SW7 2AZ, UK
| | - Lan Guan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center Lubbock, TX, 79430, USA
| | - Brian K Kobilka
- Molecular and Cellular Physiology, Stanford University, Stanford, CA, 94305, USA
| | - Claus J Loland
- Department of Neuroscience, University of Copenhagen, 2200, Copenhagen, Denmark
| | - Pil Seok Chae
- Department of Bionanotechnology, Hanyang University, Ansan, 15588, Korea
| |
Collapse
|
28
|
Ehsan M, Du Y, Molist I, Seven AB, Hariharan P, Mortensen JS, Ghani L, Loland CJ, Skiniotis G, Guan L, Byrne B, Kobilka BK, Chae PS. Vitamin E-based glycoside amphiphiles for membrane protein structural studies. Org Biomol Chem 2019; 16:2489-2498. [PMID: 29564464 DOI: 10.1039/c8ob00270c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Membrane proteins play critical roles in a variety of cellular processes. For a detailed molecular level understanding of their biological functions and roles in disease, it is necessary to extract them from the native membranes. While the amphipathic nature of these bio-macromolecules presents technical challenges, amphiphilic assistants such as detergents serve as useful tools for membrane protein structural and functional studies. Conventional detergents are limited in their ability to maintain the structural integrity of membrane proteins and thus it is essential to develop novel agents with enhanced properties. Here, we designed and characterized a novel class of amphiphiles with vitamin E (i.e., α-tocopherol) as the hydrophobic tail group and saccharide units as the hydrophilic head group. Designated vitamin E-based glycosides (VEGs), these agents were evaluated for their ability to solubilize and stabilize a set of membrane proteins. VEG representatives not only conferred markedly enhanced stability to a diverse range of membrane proteins compared to conventional detergents, but VEG-3 also showed notable efficacy toward stabilization and visualization of a membrane protein complex. In addition to hydrophile-lipophile balance (HLB) of detergent molecules, the chain length and molecular geometry of the detergent hydrophobic group seem key factors in determining detergent efficacy for membrane protein (complex) stability.
Collapse
Affiliation(s)
- Muhammad Ehsan
- Department of Bionanotechnology, Hanyang University, Ansan, 15588, Korea.
| | - Yang Du
- Molecular and Cellular Physiology, Stanford, CA 94305, USA.
| | - Iago Molist
- Department of Life Sciences, Imperial College London, London, SW7 2AZ, UK.
| | - Alpay B Seven
- Molecular and Cellular Physiology, Stanford, CA 94305, USA.
| | - Parameswaran Hariharan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center Lubbock, TX 79430, USA.
| | - Jonas S Mortensen
- Department of Neuroscience, University of Copenhagen, DK- 2200 Copenhagen, Denmark.
| | - Lubna Ghani
- Department of Bionanotechnology, Hanyang University, Ansan, 15588, Korea.
| | - Claus J Loland
- Department of Neuroscience, University of Copenhagen, DK- 2200 Copenhagen, Denmark.
| | | | - Lan Guan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center Lubbock, TX 79430, USA.
| | - Bernadette Byrne
- Department of Life Sciences, Imperial College London, London, SW7 2AZ, UK.
| | | | - Pil Seok Chae
- Department of Bionanotechnology, Hanyang University, Ansan, 15588, Korea.
| |
Collapse
|
29
|
Hussain H, Helton T, Du Y, Mortensen JS, Hariharan P, Ehsan M, Byrne B, Loland CJ, Kobilka BK, Guan L, Chae PS. A comparative study of branched and linear mannitol-based amphiphiles on membrane protein stability. Analyst 2019; 143:5702-5710. [PMID: 30334564 DOI: 10.1039/c8an01408f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The study of membrane proteins is extremely challenging, mainly because of the incompatibility of the hydrophobic surfaces of membrane proteins with an aqueous medium. Detergents are essential agents used to maintain membrane protein stability in non-native environments. However, conventional detergents fail to stabilize the native structures of many membrane proteins. Development of new amphipathic agents with enhanced efficacy for membrane protein stabilization is necessary to address this important problem. We have designed and synthesized linear and branched mannitol-based amphiphiles (MNAs), and comparative studies showed that most of the branched MNAs had advantages over the linear agents in terms of membrane protein stability. In addition, a couple of the new MNAs displayed favorable behaviors compared to n-dodecyl-β-d-maltoside and the previously developed MNAs in maintaining the native protein structures, indicating potential utility of these new agents in membrane protein study.
Collapse
Affiliation(s)
- Hazrat Hussain
- Department of Bionanotechnology, Hanyang University, Ansan, 15588, Korea.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
30
|
Das M, Du Y, Mortensen JS, Ramos M, Ghani L, Lee HJ, Bae HE, Byrne B, Guan L, Loland CJ, Kobilka BK, Seok Chae P. Correction: Trehalose-cored amphiphiles for membrane protein stabilization: importance of the detergent micelle size in GPCR stability. Org Biomol Chem 2019; 17:4919-4920. [DOI: 10.1039/c9ob90075f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Correction for ‘Trehalose-cored amphiphiles for membrane protein stabilization: importance of the detergent micelle size in GPCR stability’ by Manabendra Das et al., Org. Biomol. Chem., 2019, 17, 3249–3257.
Collapse
Affiliation(s)
- Manabendra Das
- Department of Bionanotechnology
- Hanyang University
- Ansan
- Korea
| | - Yang Du
- Molecular and Cellular Physiology
- Stanford University
- Stanford
- USA
| | | | - Manuel Ramos
- Department of Cell Physiology and Molecular Biophysics
- Center for Membrane Protein Research
- School of Medicine
- Texas Tech University Health Sciences Center
- Lubbock
| | - Lubna Ghani
- Department of Bionanotechnology
- Hanyang University
- Ansan
- Korea
| | - Ho Jin Lee
- Department of Bionanotechnology
- Hanyang University
- Ansan
- Korea
| | - Hyoung Eun Bae
- Department of Bionanotechnology
- Hanyang University
- Ansan
- Korea
| | - Bernadette Byrne
- Department of Life Sciences
- Imperial College London
- London
- SW7 2AZ UK
| | - Lan Guan
- Department of Cell Physiology and Molecular Biophysics
- Center for Membrane Protein Research
- School of Medicine
- Texas Tech University Health Sciences Center
- Lubbock
| | - Claus J. Loland
- Department of Neuroscience
- University of Copenhagen
- Copenhagen
- Denmark
| | | | - Pil Seok Chae
- Department of Bionanotechnology
- Hanyang University
- Ansan
- Korea
| |
Collapse
|
31
|
Bae HE, Du Y, Hariharan P, Mortensen JS, Kumar KK, Ha B, Das M, Lee HS, Loland CJ, Guan L, Kobilka BK, Chae PS. Asymmetric maltose neopentyl glycol amphiphiles for a membrane protein study: effect of detergent asymmetricity on protein stability. Chem Sci 2018; 10:1107-1116. [PMID: 30774908 PMCID: PMC6346398 DOI: 10.1039/c8sc02560f] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 11/04/2018] [Indexed: 12/21/2022] Open
Abstract
An asymmetric MNG, MNG-8,12, provided enhanced stability to human G protein-coupled receptors (GPCRs) compared to the symmetric MNG, MNG-3.
Maintaining protein stability in an aqueous solution is a prerequisite for protein structural and functional studies, but conventional detergents have increasingly showed limited ability to maintain protein integrity. A representative novel agent, maltose neopentyl glycol-3 (MNG-3), has recently substantially contributed to membrane protein structural studies. Motivated by the popular use of this novel agent, we prepared asymmetric versions of MNG-3 and evaluated these agents with several membrane proteins including two G protein-coupled receptors in this study. We found that some new MNGs were significantly more effective than MNG-3 at preserving protein integrity in the long term, suggesting that these asymmetric MNGs will find a wide use in membrane protein studies. In addition, this is the first study addressing the favorable effect of detergent asymmetric nature on membrane protein stability.
Collapse
Affiliation(s)
- Hyoung Eun Bae
- Department of Bionanotechnology , Hanyang University , Ansan , 15588 Korea .
| | - Yang Du
- Molecular and Cellular Physiology , Stanford , CA 94305 , USA .
| | - Parameswaran Hariharan
- Department of Cell Physiology and Molecular Biophysics , Center for Membrane Protein Research , School of Medicine , Texas Tech University Health Sciences Center Lubbock , TX 79430 , USA .
| | - Jonas S Mortensen
- Department of Neuroscience , University of Copenhagen , DK-2200 Copenhagen , Denmark .
| | - Kaavya K Kumar
- Molecular and Cellular Physiology , Stanford , CA 94305 , USA .
| | - Betty Ha
- Molecular and Cellular Physiology , Stanford , CA 94305 , USA .
| | - Manabendra Das
- Department of Bionanotechnology , Hanyang University , Ansan , 15588 Korea .
| | - Hyun Sung Lee
- Department of Bionanotechnology , Hanyang University , Ansan , 15588 Korea .
| | - Claus J Loland
- Department of Neuroscience , University of Copenhagen , DK-2200 Copenhagen , Denmark .
| | - Lan Guan
- Department of Cell Physiology and Molecular Biophysics , Center for Membrane Protein Research , School of Medicine , Texas Tech University Health Sciences Center Lubbock , TX 79430 , USA .
| | - Brian K Kobilka
- Molecular and Cellular Physiology , Stanford , CA 94305 , USA .
| | - Pil Seok Chae
- Department of Bionanotechnology , Hanyang University , Ansan , 15588 Korea .
| |
Collapse
|
32
|
Das M, Du Y, Mortensen JS, Hariharan P, Lee HS, Byrne B, Loland CJ, Guan L, Kobilka BK, Chae PS. Rationally Engineered Tandem Facial Amphiphiles for Improved Membrane Protein Stabilization Efficacy. Chembiochem 2018; 19:2225-2232. [PMID: 30070754 DOI: 10.1002/cbic.201800388] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Indexed: 01/11/2023]
Abstract
A new family of tandem facial glucosides/maltosides (TFGs/TFMs) for membrane protein manipulation was prepared. The best detergent varied depending on the hydrophobic thickness of the target protein, but ether-based TFMs (TFM-C0E, TFM-C3E, and TFM-C5E) were notable for their ability to confer higher membrane protein stability than the previously developed amide-based TFA-1 (P. S. Chae, K. Gotfryd, J. Pacyna, L. J. W. Miercke, S. G. F. Rasmussen, R. A. Robbins, R. R. Rana, C. J. Loland, B. Kobilka, R. Stroud, B. Byrne, U. Gether, S. H. Gellman, J. Am. Chem. Soc. 2010, 132, 16750-16752). Thus, this study not only introduces novel agents with the potential to be used in membrane protein research but also highlights the importance of both the hydrophobic length and linker functionality of the detergent in stabilizing membrane proteins.
Collapse
Affiliation(s)
- Manabendra Das
- Department of Bionanotechnology, Hanyang University, 55 Hanyangdaehak-ro, Ansan, 155-88, Korea.,Present address: Molecular Biophysics, Technische Universität Kaiserslautern, Erwin-Schrödinger-Strasse 13, 67663, Kaiserslautern, Germany
| | - Yang Du
- Molecular and Cellular Physiology, Stanford University, 279 Campus Drive, Stanford, CA, 94305, USA
| | - Jonas S Mortensen
- Department of Neuroscience, University of Copenhagen, Blegdamsvej 3, 2200, Copenhagen, Denmark
| | - Parameswaran Hariharan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center, 3601 4th St. MS 6551, Lubbock, TX, 79430, USA
| | - Hyun Sung Lee
- Department of Bionanotechnology, Hanyang University, 55 Hanyangdaehak-ro, Ansan, 155-88, Korea
| | - Bernadette Byrne
- Department of Life Sciences, Imperial College London, Exhibition Road, London, SW7 2AZ, UK
| | - Claus J Loland
- Department of Neuroscience, University of Copenhagen, Blegdamsvej 3, 2200, Copenhagen, Denmark
| | - Lan Guan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center, 3601 4th St. MS 6551, Lubbock, TX, 79430, USA
| | - Brian K Kobilka
- Molecular and Cellular Physiology, Stanford University, 279 Campus Drive, Stanford, CA, 94305, USA
| | - Pil Seok Chae
- Department of Bionanotechnology, Hanyang University, 55 Hanyangdaehak-ro, Ansan, 155-88, Korea
| |
Collapse
|
33
|
Ehsan M, Ghani L, Du Y, Hariharan P, Mortensen JS, Ribeiro O, Hu H, Skiniotis G, Loland CJ, Guan L, Kobilka BK, Byrne B, Chae PS. New penta-saccharide-bearing tripod amphiphiles for membrane protein structure studies. Analyst 2018; 142:3889-3898. [PMID: 28913526 DOI: 10.1039/c7an01168g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Integral membrane proteins either alone or as complexes carry out a range of key cellular functions. Detergents are indispensable tools in the isolation of membrane proteins from biological membranes for downstream studies. Although a large number of techniques and tools, including a wide variety of detergents, are available, purification and structural characterization of many membrane proteins remain challenging. In the current study, a new class of tripod amphiphiles bearing two different penta-saccharide head groups, designated TPSs, were developed and evaluated for their ability to extract and stabilize a range of diverse membrane proteins. Variations in the structures of the detergent head and tail groups allowed us to prepare three sets of the novel agents with distinctive structures. Some TPSs (TPS-A8 and TPS-E7) were efficient at extracting two proteins in a functional state while others (TPS-E8 and TPS-E10L) conferred marked stability to all membrane proteins (and membrane protein complexes) tested here compared to a conventional detergent. Use of TPS-E10L led to clear visualization of a receptor-Gs complex using electron microscopy, indicating profound potential in membrane protein research.
Collapse
Affiliation(s)
- Muhammad Ehsan
- Department of Bionanotechnology, Hanyang University, Ansan, 15588, Korea.
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
34
|
Ehsan M, Das M, Stern V, Du Y, Mortensen JS, Hariharan P, Byrne B, Loland CJ, Kobilka BK, Guan L, Chae PS. Steroid-Based Amphiphiles for Membrane Protein Study: The Importance of Alkyl Spacers for Protein Stability. Chembiochem 2018; 19:1433-1443. [PMID: 29660780 PMCID: PMC7238963 DOI: 10.1002/cbic.201800106] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Indexed: 01/04/2023]
Abstract
Membrane proteins allow effective communication between cells and organelles and their external environments. Maintaining membrane protein stability in a non-native environment is the major bottleneck to their structural study. Detergents are widely used to extract membrane proteins from the membrane and to keep the extracted protein in a stable state for downstream characterisation. In this study, three sets of steroid-based amphiphiles-glyco-diosgenin analogues (GDNs) and steroid-based pentasaccharides either lacking a linker (SPSs) or containing a linker (SPS-Ls)-have been developed as new chemical tools for membrane protein research. These detergents were tested with three membrane proteins in order to characterise their ability to extract membrane proteins from the membrane and to stabilise membrane proteins long-term. Some of the detergents, particularly the SPS-Ls, displayed favourable behaviour with the tested membrane proteins. This result indicates the potential utility of these detergents as chemical tools for membrane protein structural study and a critical role of the simple alkyl spacer in determining detergent efficacy.
Collapse
Affiliation(s)
- Muhammad Ehsan
- Department of Bionanotechnology, Hanyang University, 55 Hanyangdaehak-ro, Ansan, 15588, Republic of Korea
| | - Manabendra Das
- Department of Bionanotechnology, Hanyang University, 55 Hanyangdaehak-ro, Ansan, 15588, Republic of Korea
| | - Valerie Stern
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University, Health Sciences Center, 3601 4th Street, Lubbock, TX, 79430, USA
| | - Yang Du
- Molecular and Cellular Physiology, Stanford University School of Medicine, 279 Campus Drive, Stanford, CA, 94305, USA
| | - Jonas S Mortensen
- Department of Neuroscience, University of Copenhagen, Blegdamsvej 3, 2200, Copenhagen, Denmark
| | - Parameswaran Hariharan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University, Health Sciences Center, 3601 4th Street, Lubbock, TX, 79430, USA
| | - Bernadette Byrne
- Department of Life Sciences, Imperial College London, South Kensington Campus, London, SW7 2AZ, UK
| | - Claus J Loland
- Department of Neuroscience, University of Copenhagen, Blegdamsvej 3, 2200, Copenhagen, Denmark
| | - Brian K Kobilka
- Molecular and Cellular Physiology, Stanford University School of Medicine, 279 Campus Drive, Stanford, CA, 94305, USA
| | - Lan Guan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University, Health Sciences Center, 3601 4th Street, Lubbock, TX, 79430, USA
| | - Pil Seok Chae
- Department of Bionanotechnology, Hanyang University, 55 Hanyangdaehak-ro, Ansan, 15588, Republic of Korea
| |
Collapse
|
35
|
Das M, Du Y, Mortensen JS, Bae HE, Byrne B, Loland CJ, Kobilka BK, Chae PS. An Engineered Lithocholate-Based Facial Amphiphile Stabilizes Membrane Proteins: Assessing the Impact of Detergent Customizability on Protein Stability. Chemistry 2018; 24:9860-9868. [PMID: 29741269 DOI: 10.1002/chem.201801141] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 04/27/2018] [Indexed: 01/06/2023]
Abstract
Amphiphiles are critical tools for the structural and functional study of membrane proteins. Membrane proteins encapsulated by conventional head-to-tail detergents tend to undergo structural degradation, necessitating the development of structurally novel agents with improved efficacy. In recent years, facial amphiphiles have yielded encouraging results in terms of membrane protein stability. Herein, we report a new facial detergent (i.e., LFA-C4) that confers greater stability to tested membrane proteins than the bola form analogue. Owing to the increased facial property and the adaptability of the detergent micelles in complex with different membrane proteins, LFA-C4 yields increased stability compared to n-dodecyl-β-d-maltoside (DDM). Thus, this study not only describes a novel maltoside detergent with enhanced protein-stabilizing properties, but also shows that the customizable nature of a detergent plays an important role in the stabilization of membrane proteins. Owing to both synthetic convenience and enhanced stabilization efficacy for a range of membrane proteins, the new agent has major potential in membrane protein research.
Collapse
Affiliation(s)
- Manabendra Das
- Department of Bionanotechnology, Hanyang University, Ansan, 155-88, Korea
| | - Yang Du
- Molecular and Cellular Physiology, Stanford, CA, 94305, USA
| | - Jonas S Mortensen
- Department of Neuroscience, University of Copenhagen, Copenhagen N, DK-2200, Denmark
| | - Hyoung Eun Bae
- Department of Bionanotechnology, Hanyang University, Ansan, 155-88, Korea
| | - Bernadette Byrne
- Department of Life Sciences, Imperial College London, London, SW7 2AZ, UK
| | - Claus J Loland
- Department of Neuroscience, University of Copenhagen, Copenhagen N, DK-2200, Denmark
| | | | - Pil Seok Chae
- Department of Bionanotechnology, Hanyang University, Ansan, 155-88, Korea
| |
Collapse
|
36
|
Sadaf A, Du Y, Santillan C, Mortensen JS, Molist I, Seven AB, Hariharan P, Skiniotis G, Loland CJ, Kobilka BK, Guan L, Byrne B, Chae PS. Dendronic trimaltoside amphiphiles (DTMs) for membrane protein study. Chem Sci 2017; 8:8315-8324. [PMID: 29619178 PMCID: PMC5858085 DOI: 10.1039/c7sc03700g] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Accepted: 10/14/2017] [Indexed: 01/07/2023] Open
Abstract
A novel amphiphile with a dendronic hydrophobic group (DTM-A6) was markedly effective at stabilizing and visualizing a GPCR-Gs complex.
The critical contribution of membrane proteins in normal cellular function makes their detailed structure and functional analysis essential. Detergents, amphipathic agents with the ability to maintain membrane proteins in a soluble state in aqueous solution, have key roles in membrane protein manipulation. Structural and functional stability is a prerequisite for biophysical characterization. However, many conventional detergents are limited in their ability to stabilize membrane proteins, making development of novel detergents for membrane protein manipulation an important research area. The architecture of a detergent hydrophobic group, that directly interacts with the hydrophobic segment of membrane proteins, is a key factor in dictating their efficacy for both membrane protein solubilization and stabilization. In the current study, we developed two sets of maltoside-based detergents with four alkyl chains by introducing dendronic hydrophobic groups connected to a trimaltoside head group, designated dendronic trimaltosides (DTMs). Representative DTMs conferred enhanced stabilization to multiple membrane proteins compared to the benchmark conventional detergent, DDM. One DTM (i.e., DTM-A6) clearly outperformed DDM in stabilizing human β2 adrenergic receptor (β2AR) and its complex with Gs protein. A further evaluation of this DTM led to a clear visualization of β2AR-Gs complex via electron microscopic analysis. Thus, the current study not only provides novel detergent tools useful for membrane protein study, but also suggests that the dendronic architecture has a role in governing detergent efficacy for membrane protein stabilization.
Collapse
Affiliation(s)
- Aiman Sadaf
- Department of Bionanotechnology , Hanyang University , Ansan , 155-88 , Korea .
| | - Yang Du
- Molecular and Cellular Physiology , Stanford , CA 94305 , USA .
| | - Claudia Santillan
- Department of Cell Physiology and Molecular Biophysics , Center for Membrane Protein Research , School of Medicine , Texas Tech University Health Sciences Center , Lubbock , TX 79430 , USA .
| | - Jonas S Mortensen
- Center of Neuroscience , University of Copenhagen , DK 2200 Copenhagen , Denmark .
| | - Iago Molist
- Department of Life Sciences , Imperial College London , London , SW7 2AZ , UK .
| | - Alpay B Seven
- Structural Biology & Molecular and Cellular Physiology , Stanford , CA 94305 , USA .
| | - Parameswaran Hariharan
- Department of Cell Physiology and Molecular Biophysics , Center for Membrane Protein Research , School of Medicine , Texas Tech University Health Sciences Center , Lubbock , TX 79430 , USA .
| | - Georgios Skiniotis
- Structural Biology & Molecular and Cellular Physiology , Stanford , CA 94305 , USA .
| | - Claus J Loland
- Center of Neuroscience , University of Copenhagen , DK 2200 Copenhagen , Denmark .
| | - Brian K Kobilka
- Molecular and Cellular Physiology , Stanford , CA 94305 , USA .
| | - Lan Guan
- Department of Cell Physiology and Molecular Biophysics , Center for Membrane Protein Research , School of Medicine , Texas Tech University Health Sciences Center , Lubbock , TX 79430 , USA .
| | - Bernadette Byrne
- Department of Life Sciences , Imperial College London , London , SW7 2AZ , UK .
| | - Pil Seok Chae
- Department of Bionanotechnology , Hanyang University , Ansan , 155-88 , Korea .
| |
Collapse
|
37
|
Hussain H, Du Y, Tikhonova E, Mortensen JS, Ribeiro O, Santillan C, Das M, Ehsan M, Loland CJ, Guan L, Kobilka BK, Byrne B, Chae PS. Resorcinarene-Based Facial Glycosides: Implication of Detergent Flexibility on Membrane-Protein Stability. Chemistry 2017; 23:6724-6729. [PMID: 28303608 DOI: 10.1002/chem.201605016] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Indexed: 11/08/2022]
Abstract
As a membrane-mimetic system, detergent micelles are popularly used to extract membrane proteins from lipid environments and to maintain their solubility and stability in an aqueous medium. However, many membrane proteins encapsulated in conventional detergents tend to undergo structural degradation during extraction and purification, thus necessitating the development of new agents with enhanced properties. In the current study, two classes of new amphiphiles are introduced, resorcinarene-based glucoside and maltoside amphiphiles (designated RGAs and RMAs, respectively), for which the alkyl chains are facially segregated from the carbohydrate head groups. Of these facial amphiphiles, two RGAs (RGA-C11 and RGA-C13) conferred markedly enhanced stability to four tested membrane proteins compared to a gold-standard conventional detergent. The relatively high water solubility and micellar stability of the RGAs compared to the RMAs, along with their generally favourable behaviours for membrane protein stabilisation described here, are likely to be, at least in part, a result of the high conformational flexibility of these glucosides. This study suggests that flexibility could be an important factor in determining the suitability of new detergents for membrane protein studies.
Collapse
Affiliation(s)
- Hazrat Hussain
- Department of Bionanotechnology, Hanyang University, Ansan, 155-88, Korea
| | - Yang Du
- Molecular and Cellular Physiology, Stanford University, Stanford, CA, 94305, USA
| | - Elena Tikhonova
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX, 79430, USA
| | - Jonas S Mortensen
- Center of Neuroscience, University of Copenhagen, Copenhagen, 2200, Denmark
| | - Orquidea Ribeiro
- Department of Life Sciences, Imperial College London, London, SW7 2AZ, UK
| | - Claudia Santillan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX, 79430, USA
| | - Manabendra Das
- Department of Bionanotechnology, Hanyang University, Ansan, 155-88, Korea
| | - Muhammad Ehsan
- Department of Bionanotechnology, Hanyang University, Ansan, 155-88, Korea
| | - Claus J Loland
- Center of Neuroscience, University of Copenhagen, Copenhagen, 2200, Denmark
| | - Lan Guan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX, 79430, USA
| | - Brian K Kobilka
- Molecular and Cellular Physiology, Stanford University, Stanford, CA, 94305, USA
| | - Bernadette Byrne
- Department of Life Sciences, Imperial College London, London, SW7 2AZ, UK
| | - Pil Seok Chae
- Department of Bionanotechnology, Hanyang University, Ansan, 155-88, Korea
| |
Collapse
|
38
|
Kumar A, Chae PS. Electronically tuned sulfonamide-based probes with ultra-sensitivity for Ga3+ or Al3+ detection in aqueous solution. Anal Chim Acta 2017; 958:38-50. [DOI: 10.1016/j.aca.2016.12.032] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Revised: 12/14/2016] [Accepted: 12/16/2016] [Indexed: 01/05/2023]
|
39
|
Das M, Du Y, Ribeiro O, Hariharan P, Mortensen JS, Patra D, Skiniotis G, Loland CJ, Guan L, Kobilka BK, Byrne B, Chae PS. Conformationally Preorganized Diastereomeric Norbornane-Based Maltosides for Membrane Protein Study: Implications of Detergent Kink for Micellar Properties. J Am Chem Soc 2017; 139:3072-3081. [PMID: 28218862 PMCID: PMC5818264 DOI: 10.1021/jacs.6b11997] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Detergents are essential tools for functional and structural studies of membrane proteins. However, conventional detergents are limited in their scope and utility, particularly for eukaryotic membrane proteins. Thus, there are major efforts to develop new amphipathic agents with enhanced properties. Here, a novel class of diastereomeric agents with a preorganized conformation, designated norbornane-based maltosides (NBMs), were prepared and evaluated for their ability to solubilize and stabilize membrane proteins. Representative NBMs displayed enhanced behaviors compared to n-dodecyl-β-d-maltoside (DDM) for all membrane proteins tested. Efficacy of the individual NBMs varied depending on the overall detergent shape and alkyl chain length. Specifically, NBMs with no kink in the lipophilic region conferred greater stability to the proteins than NBMs with a kink. In addition, long alkyl chain NBMs were generally better at stabilizing membrane proteins than short alkyl chain agents. Furthermore, use of one well-behaving NBM enabled us to attain a marked stabilization and clear visualization of a challenging membrane protein complex using electron microscopy. Thus, this study not only describes novel maltoside detergents with enhanced protein-stabilizing properties but also suggests that overall detergent geometry has an important role in determining membrane protein stability. Notably, this is the first systematic study on the effect of detergent kinking on micellar properties and associated membrane protein stability.
Collapse
Affiliation(s)
- Manabendra Das
- Department of Bionanotechnology, Hanyang University, Ansan 155-88, Korea
| | - Yang Du
- Department of Molecular and Cellular Physiology, Stanford University, Stanford, California 94305, United States
| | - Orquidea Ribeiro
- Department of Life Sciences, Imperial College London, London SW7 2AZ, United Kingdom
| | - Parameswaran Hariharan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, Texas 79430, United States
| | - Jonas S. Mortensen
- Department of Neuroscience and Pharmacology, University of Copenhagen, Copenhagen DK-2200, Denmark
| | - Dhabaleswar Patra
- Life Sciences Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Georgios Skiniotis
- Life Sciences Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Claus J. Loland
- Department of Neuroscience and Pharmacology, University of Copenhagen, Copenhagen DK-2200, Denmark
| | - Lan Guan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, Texas 79430, United States
| | - Brian K. Kobilka
- Department of Molecular and Cellular Physiology, Stanford University, Stanford, California 94305, United States
| | - Bernadette Byrne
- Department of Life Sciences, Imperial College London, London SW7 2AZ, United Kingdom
| | - Pil Seok Chae
- Department of Bionanotechnology, Hanyang University, Ansan 155-88, Korea
| |
Collapse
|
40
|
Cho KH, Ribeiro O, Du Y, Tikhonova E, Mortensen JS, Markham K, Hariharan P, Loland CJ, Guan L, Kobilka BK, Byrne B, Chae PS. Mesitylene-Cored Glucoside Amphiphiles (MGAs) for Membrane Protein Studies: Importance of Alkyl Chain Density in Detergent Efficacy. Chemistry 2016; 22:18833-18839. [PMID: 27743406 DOI: 10.1002/chem.201603338] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Indexed: 01/14/2023]
Abstract
Detergents serve as useful tools for membrane protein structural and functional studies. Their amphipathic nature allows detergents to associate with the hydrophobic regions of membrane proteins whilst maintaining the proteins in aqueous solution. However, widely used conventional detergents are limited in their ability to maintain the structural integrity of membrane proteins and thus there are major efforts underway to develop novel agents with improved properties. We prepared mesitylene-cored glucoside amphiphiles (MGAs) with three alkyl chains and compared these agents with previously developed xylene-linked maltoside agents (XMAs) with two alkyl chains and a conventional detergent (DDM). When these agents were evaluated for four membrane proteins including a G protein-coupled receptor (GPCR), some agents such as MGA-C13 and MGA-C14 resulted in markedly enhanced stability of membrane proteins compared to both DDM and the XMAs. This favourable behaviour is due likely to the increased hydrophobic density provided by the extra alkyl chain. Thus, this study not only describes new glucoside agents with potential for membrane protein research, but also introduces a new detergent design principle for future development.
Collapse
Affiliation(s)
- Kyung Ho Cho
- Department of Bionanotechnology, Hanyang University, Ansan, 15588, Korea
| | - Orquidea Ribeiro
- Department of Life Sciences, Imperial College London, London, SW7 2AZ, UK
| | - Yang Du
- Molecular and Cellular Physiology, Stanford, CA, 94305, USA
| | - Elena Tikhonova
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX, 79430, USA
| | - Jonas S Mortensen
- Department of Neuroscience and Pharmacology, University of Copenhagen, 2200, Copenhagen, Denmark
| | - Kelsey Markham
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX, 79430, USA
| | - Parameswaran Hariharan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX, 79430, USA
| | - Claus J Loland
- Department of Neuroscience and Pharmacology, University of Copenhagen, 2200, Copenhagen, Denmark
| | - Lan Guan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX, 79430, USA
| | | | - Bernadette Byrne
- Department of Life Sciences, Imperial College London, London, SW7 2AZ, UK
| | - Pil Seok Chae
- Department of Bionanotechnology, Hanyang University, Ansan, 15588, Korea
| |
Collapse
|
41
|
Cho KH, Hariharan P, Mortensen JS, Du Y, Nielsen AK, Byrne B, Kobilka BK, Loland CJ, Guan L, Chae PS. Isomeric Detergent Comparison for Membrane Protein Stability: Importance of Inter-Alkyl-Chain Distance and Alkyl Chain Length. Chembiochem 2016; 17:2334-2339. [PMID: 27981750 DOI: 10.1002/cbic.201600429] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Indexed: 01/23/2023]
Abstract
Membrane proteins encapsulated by detergent micelles are widely used for structural study. Because of their amphipathic property, detergents have the ability to maintain protein solubility and stability in an aqueous medium. However, conventional detergents have serious limitations in their scope and utility, particularly for eukaryotic membrane proteins and membrane protein complexes. Thus, a number of new agents have been devised; some have made significant contributions to membrane protein structural studies. However, few detergent design principles are available. In this study, we prepared meta and ortho isomers of the previously reported para-substituted xylene-linked maltoside amphiphiles (XMAs), along with alkyl chain-length variation. The isomeric XMAs were assessed with three membrane proteins, and the meta isomer with a C12 alkyl chain was most effective at maintaining solubility/stability of the membrane proteins. We propose that interplay between the hydrophile-lipophile balance (HLB) and alkyl chain length is of central importance for high detergent efficacy. In addition, differences in inter-alkyl-chain distance between the isomers influence the ability of the detergents to stabilise membrane proteins.
Collapse
Affiliation(s)
- Kyung Ho Cho
- Department of Bionanotechnology, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan, 15588, Korea
| | - Parameswaran Hariharan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center, 3601 4thStreet MS 6551, Lubbock, TX, 79430, USA
| | - Jonas S Mortensen
- Department of Neuroscience and Pharmacology, University of Copenhagen, Blegdamsvej 3, 18.6 Panum Institute, 2200, Copenhagen, Denmark
| | - Yang Du
- Molecular and Cellular Physiology, Stanford University, 157 Beckman Center, 279 Campus Drive, Stanford, CA, 94305, USA
| | - Anne K Nielsen
- Department of Neuroscience and Pharmacology, University of Copenhagen, Blegdamsvej 3, 18.6 Panum Institute, 2200, Copenhagen, Denmark
| | - Bernadette Byrne
- Department of Life Sciences, Imperial College London, Exhibition Road, South Kensington, London, SW7 2AZ, UK
| | - Brian K Kobilka
- Molecular and Cellular Physiology, Stanford University, 157 Beckman Center, 279 Campus Drive, Stanford, CA, 94305, USA
| | - Claus J Loland
- Department of Neuroscience and Pharmacology, University of Copenhagen, Blegdamsvej 3, 18.6 Panum Institute, 2200, Copenhagen, Denmark
| | - Lan Guan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center, 3601 4thStreet MS 6551, Lubbock, TX, 79430, USA
| | - Pil Seok Chae
- Department of Bionanotechnology, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan, 15588, Korea
| |
Collapse
|
42
|
Das M, Du Y, Mortensen JS, Ribeiro O, Hariharan P, Guan L, Loland CJ, Kobilka BK, Byrne B, Chae PS. Butane-1,2,3,4-tetraol-based amphiphilic stereoisomers for membrane protein study: importance of chirality in the linker region. Chem Sci 2016; 8:1169-1177. [PMID: 28451257 PMCID: PMC5369527 DOI: 10.1039/c6sc02981g] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Accepted: 09/27/2016] [Indexed: 12/14/2022] Open
Abstract
Chirality variation in amphiphile architecture resulted in a significant difference in detergent efficacy for membrane protein stabilisation.
Amphiphile selection is a crucial step in membrane protein structural and functional study. As conventional detergents have limited scope and utility, novel agents with enhanced efficacy need to be developed. Although a large number of novel agents have been reported, so far there has been no systematically designed comparative study of the protein stabilization efficacy of stereo-isomeric amphiphiles. Here we designed and prepared a novel class of stereo-isomeric amphiphiles, designated butane-1,2,3,4-tetraol-based maltosides (BTMs). These stereoisomers showed markedly different behaviour for most of the targeted membrane proteins depending on the chirality of the linker region. These findings indicate an important role for detergent stereochemistry in membrane protein stabilization. In addition, we generally observed enhanced detergent efficacy with increasing alkyl chain length, reinforcing the importance of the balance between hydrophobicity and hydrophilicity in detergent design. The stereo-isomeric difference in detergent efficacy observed provides an important design principle for the development of novel amphiphiles for membrane protein manipulation.
Collapse
Affiliation(s)
- Manabendra Das
- Department of Bionanotechnology , Hanyang University , Ansan , 15588 , Korea .
| | - Yang Du
- Molecular and Cellular Physiology , Stanford , CA 94305 , USA .
| | - Jonas S Mortensen
- Department of Neuroscience and Pharmacology , University of Copenhagen , DK-2200 Copenhagen , Denmark .
| | - Orquidea Ribeiro
- Department of Life Sciences , Imperial College London , London , SW7 2AZ , UK .
| | - Parameswaran Hariharan
- Department of Cell Physiology and Molecular Biophysics , Center for Membrane Protein Research , School of Medicine , Texas Tech University Health Sciences Center , Lubbock , TX 79430 , USA .
| | - Lan Guan
- Department of Cell Physiology and Molecular Biophysics , Center for Membrane Protein Research , School of Medicine , Texas Tech University Health Sciences Center , Lubbock , TX 79430 , USA .
| | - Claus J Loland
- Department of Neuroscience and Pharmacology , University of Copenhagen , DK-2200 Copenhagen , Denmark .
| | - Brian K Kobilka
- Molecular and Cellular Physiology , Stanford , CA 94305 , USA .
| | - Bernadette Byrne
- Department of Life Sciences , Imperial College London , London , SW7 2AZ , UK .
| | - Pil Seok Chae
- Department of Bionanotechnology , Hanyang University , Ansan , 15588 , Korea .
| |
Collapse
|
43
|
Bae HE, Mortensen JS, Ribeiro O, Du Y, Ehsan M, Kobilka BK, Loland CJ, Byrne B, Chae PS. Tandem neopentyl glycol maltosides (TNMs) for membrane protein stabilisation. Chem Commun (Camb) 2016; 52:12104-12107. [PMID: 27711401 PMCID: PMC5500197 DOI: 10.1039/c6cc06147h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A novel class of detergents, designated tandem neopentyl glycol maltosides (TNMs), were evaluated with four target membrane proteins. The best detergent varied depending on the target, but TNM-C12L and TNM-C11S were notable for their ability to confer increased membrane protein stability compared to DDM. These agents have potential for use in membrane protein research.
Collapse
Affiliation(s)
- Hyoung Eun Bae
- Department of Bionanotechnology, Hanyang University, Ansan, 15588, Korea.
| | - Jonas S Mortensen
- Department of Neuroscience and Pharmacology, University of Copenhagen, DK-2200 Copenhagen, Denmark.
| | - Orquidea Ribeiro
- Department of Life Sciences, Imperial College London, London, SW7 2AZ, UK.
| | - Yang Du
- Molecular and Cellular Physiology, Stanford, CA 94305, USA.
| | - Muhammad Ehsan
- Department of Bionanotechnology, Hanyang University, Ansan, 15588, Korea.
| | | | - Claus J Loland
- Department of Neuroscience and Pharmacology, University of Copenhagen, DK-2200 Copenhagen, Denmark.
| | - Bernadette Byrne
- Department of Life Sciences, Imperial College London, London, SW7 2AZ, UK.
| | - Pil Seok Chae
- Department of Bionanotechnology, Hanyang University, Ansan, 15588, Korea.
| |
Collapse
|
44
|
Hussain H, Du Y, Scull NJ, Mortensen JS, Tarrasch J, Bae HE, Loland CJ, Byrne B, Kobilka BK, Chae PS. Accessible Mannitol-Based Amphiphiles (MNAs) for Membrane Protein Solubilisation and Stabilisation. Chemistry 2016; 22:7068-73. [PMID: 27072057 DOI: 10.1002/chem.201600533] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Indexed: 12/29/2022]
Abstract
Integral membrane proteins are amphipathic molecules crucial for all cellular life. The structural study of these macromolecules starts with protein extraction from the native membranes, followed by purification and crystallisation. Detergents are essential tools for these processes, but detergent-solubilised membrane proteins often denature and aggregate, resulting in loss of both structure and function. In this study, a novel class of agents, designated mannitol-based amphiphiles (MNAs), were prepared and characterised for their ability to solubilise and stabilise membrane proteins. Some of MNAs conferred enhanced stability to four membrane proteins including a G protein-coupled receptor (GPCR), the β2 adrenergic receptor (β2 AR), compared to both n-dodecyl-d-maltoside (DDM) and the other MNAs. These agents were also better than DDM for electron microscopy analysis of the β2 AR. The ease of preparation together with the enhanced membrane protein stabilisation efficacy demonstrates the value of these agents for future membrane protein research.
Collapse
Affiliation(s)
- Hazrat Hussain
- Department of Bionanotechnology, Hanyang University, Ansan, 426-791, Korea
| | - Yang Du
- Molecular and Cellular Physiology, Stanford University, Stanford, CA 94305, USA
| | - Nicola J Scull
- Department of Life Sciences, Imperial College London, London, SW7 2AZ, UK
| | - Jonas S Mortensen
- Department of Neuroscience and Pharmacology, University of Copenhagen, Copenhagen, DK-2200, Denmark
| | - Jeffrey Tarrasch
- Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109, USA
| | - Hyoung Eun Bae
- Department of Bionanotechnology, Hanyang University, Ansan, 426-791, Korea
| | - Claus J Loland
- Department of Neuroscience and Pharmacology, University of Copenhagen, Copenhagen, DK-2200, Denmark
| | - Bernadette Byrne
- Department of Life Sciences, Imperial College London, London, SW7 2AZ, UK
| | - Brian K Kobilka
- Molecular and Cellular Physiology, Stanford University, Stanford, CA 94305, USA
| | - Pil Seok Chae
- Department of Bionanotechnology, Hanyang University, Ansan, 426-791, Korea.
| |
Collapse
|
45
|
Ehsan M, Du Y, Scull NJ, Tikhonova E, Tarrasch J, Mortensen JS, Loland CJ, Skiniotis G, Guan L, Byrne B, Kobilka BK, Chae PS. Highly Branched Pentasaccharide-Bearing Amphiphiles for Membrane Protein Studies. J Am Chem Soc 2016; 138:3789-96. [PMID: 26966956 DOI: 10.1021/jacs.5b13233] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Detergents are essential tools for membrane protein manipulation. Micelles formed by detergent molecules have the ability to encapsulate the hydrophobic domains of membrane proteins. The resulting protein-detergent complexes (PDCs) are compatible with the polar environments of aqueous media, making structural and functional analysis feasible. Although a number of novel agents have been developed to overcome the limitations of conventional detergents, most have traditional head groups such as glucoside or maltoside. In this study, we introduce a class of amphiphiles, the PSA/Es with a novel highly branched pentasaccharide hydrophilic group. The PSA/Es conferred markedly increased stability to a diverse range of membrane proteins compared to conventional detergents, indicating a positive role for the new hydrophilic group in maintaining the native protein integrity. In addition, PDCs formed by PSA/Es were smaller and more suitable for electron microscopic analysis than those formed by DDM, indicating that the new agents have significant potential for the structure-function studies of membrane proteins.
Collapse
Affiliation(s)
- Muhammad Ehsan
- Department of Bionanotechnology, Hanyang University , Ansan, 426-791, Korea
| | - Yang Du
- Molecular and Cellular Physiology, Stanford University , Stanford, California 94305, United States
| | - Nicola J Scull
- Department of Life Sciences, Imperial College London , London, SW7 2AZ, U.K
| | - Elena Tikhonova
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center , Lubbock, Texas 79430, United States
| | - Jeffrey Tarrasch
- Life Sciences Institute, University of Michigan , Ann Arbor, Michigan 48109, United States
| | - Jonas S Mortensen
- Department of Neuroscience and Pharmacology, University of Copenhagen , Copenhagen, DK-2200, Denmark
| | - Claus J Loland
- Department of Neuroscience and Pharmacology, University of Copenhagen , Copenhagen, DK-2200, Denmark
| | - Georgios Skiniotis
- Life Sciences Institute, University of Michigan , Ann Arbor, Michigan 48109, United States
| | - Lan Guan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center , Lubbock, Texas 79430, United States
| | - Bernadette Byrne
- Department of Life Sciences, Imperial College London , London, SW7 2AZ, U.K
| | - Brian K Kobilka
- Molecular and Cellular Physiology, Stanford University , Stanford, California 94305, United States
| | - Pil Seok Chae
- Department of Bionanotechnology, Hanyang University , Ansan, 426-791, Korea
| |
Collapse
|
46
|
Sadaf A, Mortensen JS, Capaldi S, Tikhonova E, Hariharan P, de Castro Ribeiro O, Loland CJ, Guan L, Byrne B, Chae PS. A Class of Rigid Linker-bearing Glucosides for Membrane Protein Structural Study. Chem Sci 2015; 7:1933-1939. [PMID: 27110345 PMCID: PMC4836865 DOI: 10.1039/c5sc02900g] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Novel glycoside amphiphile (NDT-C11) displays favorable behavior in maintaining both protein stability and conformational flexibility compared to DDM and MNG-3.
Membrane proteins are amphipathic bio-macromolecules incompatible with the polar environments of aqueous media. Conventional detergents encapsulate the hydrophobic surfaces of membrane proteins allowing them to exist in aqueous solution. Membrane proteins stabilized by detergent micelles are used for structural and functional analysis. Despite the availability of a large number of detergents, only a few agents are sufficiently effective at maintaining the integrity of membrane proteins to allow successful crystallization. In the present study, we describe a novel class of synthetic amphiphiles with a branched tail group and a triglucoside head group. These head and tail groups were connected via an amide or ether linkage by using a tris(hydroxylmethyl)aminomethane (TRIS) or neopentyl glycol (NPG) linker to produce TRIS-derived triglucosides (TDTs) and NPG-derived triglucosides (NDTs), respectively. Members of this class conferred enhanced stability on target membrane proteins compared to conventional detergents. Because of straightforward synthesis of the novel agents and their favourable effects on a range of membrane proteins, these agents should be of wide applicability to membrane protein science.
Collapse
Affiliation(s)
- Aiman Sadaf
- Department of Bionanotechnology, Hanyang University, Ansan, 426-791 (Korea)
| | - Jonas S Mortensen
- Department of Neuroscience and Pharmacology, University of Copenhagen, DK-2200 Copenhagen (Denmark)
| | - Stefano Capaldi
- Department of Life Sciences, Imperial College London London, SW7 2AZ (UK) ; Department of Biotechnology, University of Verona, 37134 Verona (Italy)
| | - Elena Tikhonova
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences
| | - Parameswaran Hariharan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences
| | | | | | | | | | | |
Collapse
|
47
|
Yoo B, Lee J, Choi S, Ryu J, Lee H, Chae PS, Lee SU, Maeda M, Sohn D. Behavior of maltose-neopentyl glycol-3 (MNG-3) at the air/aqueous interface. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.07.054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
48
|
Abstract
The effect of various detergents on the stability and function of the melibiose permeases of Escherichia coli (MelBEc) and Salmonella typhimurium (MelBSt) was studied. In n-dodecyl-β-d-maltoside (DDM) or n-undecyl-β-d-maltoside (UDM), WT MelBSt binds melibiose with an affinity similar to that in the membrane. However, with WT MelBEc or MelBSt mutants (Arg141 → Cys, Arg295 → Cys, or Arg363 → Cys), galactoside binding is not detected in these detergents, but binding to the phosphotransferase protein IIA(Glc) is maintained. In the amphiphiles lauryl maltose neopentyl glycol (MNG-3) or glyco-diosgenin (GDN), galactoside binding with all of the MelB proteins is observed, with slightly reduced affinities. MelBSt is more thermostable than MelBEc, and the thermostability of either MelB is largely increased in MNG-3 or GDN. Therefore, the functional defect with DDM or UDM likely results from the relative instability of the sensitive MelB proteins, and stability, as well as galactoside binding, is retained in MNG-3 or GDN. Furthermore, isothermal titration calorimetry of melibiose binding with MelBSt shows that the favorable entropic contribution to the binding free energy is decreased in MNG-3, indicating that the conformational dynamics of MelB is restricted in this detergent.
Collapse
Affiliation(s)
- Anowarul Amin
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center , Lubbock, Texas 79430, United States
| | - Parameswaran Hariharan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center , Lubbock, Texas 79430, United States
| | - Pil Seok Chae
- Department of Bionanotechnology, Hanyang University , Ansan 426-791, Korea
| | - Lan Guan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center , Lubbock, Texas 79430, United States
| |
Collapse
|
49
|
Chae PS. Accessible Steroid-based Amphiphiles for Membrane Protein Solubilization and Stabilization. B KOREAN CHEM SOC 2015. [DOI: 10.1002/bkcs.10416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Pil Seok Chae
- Department of Bionanotechnology; Hanyang University; Ansan 426-791 Korea
| |
Collapse
|
50
|
Chae PS, Bae HE, Ehsan M, Hussain H, Kim JW. New ganglio-tripod amphiphiles (TPAs) for membrane protein solubilization and stabilization: implications for detergent structure-property relationships. Org Biomol Chem 2015; 12:8480-7. [PMID: 25227873 DOI: 10.1039/c4ob01375a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Detergents are widely used for membrane protein research; however, membrane proteins encapsulated in micelles formed by conventional detergents tend to undergo structural degradation, necessitating the development of new agents with enhanced efficacy. Here we prepared several hydrophobic variants of ganglio-tripod amphiphiles (TPAs) derived from previously reported TPAs and evaluated for a multi-subunit, pigment protein superassembly. In this study, TPA-16 was found to be most efficient in protein solubilization while TPA-15 proved most favourable in long-term protein stability. The current study combined with previous TPA studies enabled us to elaborate on a few detergent structure-property relationships that could provide useful guidelines for novel amphiphile design.
Collapse
Affiliation(s)
- Pil Seok Chae
- Department of Bionanotechnology, Hanyang University, Ansan, 426-791, Korea.
| | | | | | | | | |
Collapse
|