1
|
Silonov SA, Kuklin AI, Nesterov SV, Kuznetsova IM, Turoverov KK, Fonin AV. Pitfalls of Using ANS Dye Under Molecular Crowding Conditions. Int J Mol Sci 2024; 25:13600. [PMID: 39769361 PMCID: PMC11676346 DOI: 10.3390/ijms252413600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2024] [Revised: 12/10/2024] [Accepted: 12/17/2024] [Indexed: 01/11/2025] Open
Abstract
The 1-anilino-8-naphthalenesulfonate (ANS) fluorescent dye is widely used in protein folding studies due to the significant increase in its fluorescence quantum yield upon binding to protein hydrophobic regions that become accessible during protein unfolding. However, when modeling cellular macromolecular crowding conditions in protein folding experiments in vitro using crowding agents with guanidine hydrochloride (GdnHCl) as the denaturant, the observed changes in ANS spectral characteristics require careful consideration. This study demonstrates that crowding agents can form clusters that interact differently with ANS. Furthermore, GdnHCl can disrupt these clusters and directly affect the ANS spectral characteristics. A model for the interaction between GdnHCl, crowders, and ANS is proposed. Using bovine serum albumin (BSA) as a model protein, the limitations of using ANS for studying conformational transitions induced by GdnHCl in the presence of crowding agents are demonstrated.
Collapse
Affiliation(s)
- Sergey A. Silonov
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky Ave., 194064 St. Petersburg, Russia; (S.A.S.); (S.V.N.); (I.M.K.); (K.K.T.)
| | - Alexander I. Kuklin
- Frank Laboratory of Neutron Physics (FLNP), Joint Institute for Nuclear Research, 141980 Dubna, Russia;
| | - Semen V. Nesterov
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky Ave., 194064 St. Petersburg, Russia; (S.A.S.); (S.V.N.); (I.M.K.); (K.K.T.)
| | - Irina M. Kuznetsova
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky Ave., 194064 St. Petersburg, Russia; (S.A.S.); (S.V.N.); (I.M.K.); (K.K.T.)
| | - Konstantin K. Turoverov
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky Ave., 194064 St. Petersburg, Russia; (S.A.S.); (S.V.N.); (I.M.K.); (K.K.T.)
| | - Alexander V. Fonin
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky Ave., 194064 St. Petersburg, Russia; (S.A.S.); (S.V.N.); (I.M.K.); (K.K.T.)
| |
Collapse
|
2
|
Khairallah T, Khoury LR. Aided Porous Medium Emulsification for Functional Hydrogel Microparticles Synthesis. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2311841. [PMID: 39091048 DOI: 10.1002/adma.202311841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 06/05/2024] [Indexed: 08/04/2024]
Abstract
Despite the substantial advancement in developing various hydrogel microparticle (HMP) synthesis methods, emulsification through porous medium to synthesize functional hybrid protein-polymer HMPs has yet to be addressed. Here, the aided porous medium emulsification for hydrogel microparticle synthesis (APME-HMS) system, an innovative approach drawing inspiration from porous medium emulsification is introduced. This method capitalizes on emulsifying immiscible phases within a 3D porous structure for optimal HMP production. Using the APME-HMS system, synthesized responsive bovine serum albumin (BSA) and polyethylene glycol diacrylate (PEGDA) HMPs of various sizes are successfully synthesized. Preserving protein structural integrity and functionality enable the formation of cytochrome c (cyt c) - PEGDA HMPs for hydrogen peroxide (H2O2) detection at various concentrations. The flexibility of the APME-HMS system is demonstrated by its ability to efficiently synthesize HMPs using low volumes (≈50 µL) and concentrations (100 µm) of proteins within minutes while preserving proteins' structural and functional properties. Additionally, the capability of the APME-HMS method to produce a diverse array of HMP types enriches the palette of HMP fabrication techniques, presenting it as a cost-effective, biocompatible, and scalable alternative for various biomedical applications, such as controlled drug delivery, 3D printing bio-inks, biosensing devices, with potential implications even in culinary applications.
Collapse
Affiliation(s)
- Tina Khairallah
- Department of Materials Science and Engineering, Technion Israel Institute of Technology, Haifa, 32000, Israel
| | - Luai R Khoury
- Department of Materials Science and Engineering, Technion Israel Institute of Technology, Haifa, 32000, Israel
| |
Collapse
|
3
|
van Schaick G, Pot S, Schouten O, den Hartog J, Akeroyd M, van der Hoeven R, Bijleveld W, Abello N, Wuhrer M, Olsthoorn M, Dominguez-Vega E. Evaluating the effect of glycation on lipase activity using boronate affinity chromatography and mass spectrometry. Food Chem 2023; 421:136147. [PMID: 37087987 DOI: 10.1016/j.foodchem.2023.136147] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 03/07/2023] [Accepted: 04/10/2023] [Indexed: 05/03/2023]
Abstract
Protein glycation may occur naturally when reducing sugars and proteins coexist, which is often the case for industrial enzymes. The impact of post-translational modifications on enzyme performance (e.g., stability or function) is often not predictable, highlighting the importance of having appropriate analytical methodologies to monitor the influence of glycation on performance. Here, a boronate affinity chromatography method was developed to enrich glycated species followed by mass spectrometry for structural characterization and activity assays for functional assessment. This approach was applied to a (temperature-stressed) lipase used for food applications revealing that storage at -20 °C and 4 °C resulted in minor glycation (below 9%), whereas storage at 25 °C led to a higher glycation level with up to four sugars per lipase molecule. Remarkably, activity measurements revealed that glycation did not reduce lipase activity or stability. Altogether, this novel strategy is a helpful extension to the current analytical toolbox supporting development of enzyme products.
Collapse
Affiliation(s)
- Guusje van Schaick
- Leiden University Medical Center, Center for Proteomics and Metabolomics, Leiden, the Netherlands.
| | - Sanne Pot
- Leiden University Medical Center, Center for Proteomics and Metabolomics, Leiden, the Netherlands
| | - Olaf Schouten
- DSM Science & Innovation, Biodata & Translation, Center for Analytical Innovation, Delft, the Netherlands
| | - Joost den Hartog
- DSM Science & Innovation, Biodata & Translation, Center for Analytical Innovation, Delft, the Netherlands
| | - Michiel Akeroyd
- DSM Science & Innovation, Biodata & Translation, Center for Analytical Innovation, Delft, the Netherlands
| | - Rob van der Hoeven
- DSM Science & Innovation, Biodata & Translation, Center for Analytical Innovation, Delft, the Netherlands
| | - Wim Bijleveld
- DSM Science & Innovation, Biodata & Translation, Center for Analytical Innovation, Delft, the Netherlands
| | - Nicolas Abello
- DSM Science & Innovation, Biodata & Translation, Center for Analytical Innovation, Delft, the Netherlands
| | - Manfred Wuhrer
- Leiden University Medical Center, Center for Proteomics and Metabolomics, Leiden, the Netherlands
| | - Maurien Olsthoorn
- DSM Science & Innovation, Biodata & Translation, Center for Analytical Innovation, Delft, the Netherlands
| | - Elena Dominguez-Vega
- Leiden University Medical Center, Center for Proteomics and Metabolomics, Leiden, the Netherlands
| |
Collapse
|
4
|
Ferrara V, Marchetti M, Alfieri D, Targetti L, Scopelliti M, Pignataro B, Pavone F, Vetri V, Sancataldo G. Blue Light Activated Photodegradation of Biomacromolecules by N-doped Titanium Dioxide in a Chitosan Hydrogel Matrix. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.114451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
5
|
Petrou L, Latvanen E, Seichepine F, Kim SH, Bennett PR, Sykes L, MacIntyre DA, Terzidou V, Ladame S. Lateral Flow Test (LFT) Detects Cell‐Free MicroRNAs Predictive of Preterm Birth Directly from Human Plasma. ADVANCED NANOBIOMED RESEARCH 2022. [DOI: 10.1002/anbr.202200026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Affiliation(s)
- Loukia Petrou
- Department of Bioengineering Imperial College London W12 0BZ London UK
| | - Elmeri Latvanen
- Department of Bioengineering Imperial College London W12 0BZ London UK
| | | | - Sung Hye Kim
- March of Dimes European Preterm Birth Research Centre Imperial College London W12 0NN London UK
- Institute of Reproductive and Developmental Biology Imperial College London W12 0NN London UK
| | - Phillip R. Bennett
- March of Dimes European Preterm Birth Research Centre Imperial College London W12 0NN London UK
- Institute of Reproductive and Developmental Biology Imperial College London W12 0NN London UK
- Queen Charlotte's and Chelsea Hospital Imperial College NHS Trust W12 0HS London UK
- Department of Obstetrics & Gynaecology Chelsea and Westminster Hospital NHS Trust SW10 9NH London UK
| | - Lynne Sykes
- March of Dimes European Preterm Birth Research Centre Imperial College London W12 0NN London UK
- Institute of Reproductive and Developmental Biology Imperial College London W12 0NN London UK
- The Parasol Foundation Centre for Women's Health and Cancer Research St Mary's Hospital Imperial College NHS Trust W2 1NY London UK
| | - David A. MacIntyre
- March of Dimes European Preterm Birth Research Centre Imperial College London W12 0NN London UK
- Institute of Reproductive and Developmental Biology Imperial College London W12 0NN London UK
| | - Vasso Terzidou
- March of Dimes European Preterm Birth Research Centre Imperial College London W12 0NN London UK
- Institute of Reproductive and Developmental Biology Imperial College London W12 0NN London UK
- Department of Obstetrics & Gynaecology Chelsea and Westminster Hospital NHS Trust SW10 9NH London UK
| | - Sylvain Ladame
- Department of Bioengineering Imperial College London W12 0BZ London UK
| |
Collapse
|
6
|
Tomioka Y, Nakagawa M, Sakuma C, Kurosawa Y, Nagatoishi S, Tsumoto K, Arakawa T, Akuta T. Analysis of bovine serum albumin unfolding in the absence and presence of ATP by SYPRO Orange staining of agarose native gel electrophoresis. Anal Biochem 2022; 654:114817. [PMID: 35863464 DOI: 10.1016/j.ab.2022.114817] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 07/06/2022] [Accepted: 07/09/2022] [Indexed: 11/01/2022]
Abstract
An attempt was made to specifically stain unfolded proteins on agarose native gels. SYPRO Orange is routinely used to detect unfolded protein in differential scanning fluorimetry, which is based on the enhanced fluorescence intensity upon binding to the unfolded protein. We demonstrated that this dye barely bound to the native proteins, resulting in no or faint staining of the native bands, but bound to and stained the unfolded proteins, on agarose native gels. Using bovine serum albumin (BSA), it was shown that staining did not depend on whether BSA was thermally unfolded in the presence of SYPRO Orange or stained after electrophoresis. On the contrary, SYPRO Orange dye stained protein bands in the presence of sodium dodecylsulfate (SDS) due to incorporation of the dye into SDS micelles that bound to the unfolded proteins. This staining resulted in detection of new, intermediately unfolded structure of BSA during thermal unfolding. Such intermediate structure occurred at higher temperature in the presence of ATP.
Collapse
Affiliation(s)
- Yui Tomioka
- Research and Development Division, Kyokuto Pharmaceutical Industrial Co., Ltd, 3333-26, Aza-Asayama, Kamitezuna Takahagi-shi, Ibaraki, 318-0004, Japan.
| | - Masataka Nakagawa
- Research and Development Division, Kyokuto Pharmaceutical Industrial Co., Ltd, 3333-26, Aza-Asayama, Kamitezuna Takahagi-shi, Ibaraki, 318-0004, Japan.
| | - Chiaki Sakuma
- Research and Development Division, Kyokuto Pharmaceutical Industrial Co., Ltd, 3333-26, Aza-Asayama, Kamitezuna Takahagi-shi, Ibaraki, 318-0004, Japan.
| | - Yasunori Kurosawa
- Research and Development Division, Kyokuto Pharmaceutical Industrial Co., Ltd, 3333-26, Aza-Asayama, Kamitezuna Takahagi-shi, Ibaraki, 318-0004, Japan; Abwiz Bio Inc., 9823 Pacific Heights Blvd Ste J, San Diego, CA, 92121, USA.
| | - Satoru Nagatoishi
- The Institute of Medical Sciences, The University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo, 108-8639, Japan.
| | - Kouhei Tsumoto
- The Institute of Medical Sciences, The University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo, 108-8639, Japan; School of Engineering, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan.
| | - Tsutomu Arakawa
- Alliance Protein Laboratories, 13380 Pantera Road, San Diego, CA, 92130, USA.
| | - Teruo Akuta
- Research and Development Division, Kyokuto Pharmaceutical Industrial Co., Ltd, 3333-26, Aza-Asayama, Kamitezuna Takahagi-shi, Ibaraki, 318-0004, Japan.
| |
Collapse
|
7
|
Socas LB, Ambroggio EE. Introducing the multi-dimensional spectral phasors: a tool for the analysis of fluorescence excitation-emission matrices. Methods Appl Fluoresc 2022; 10. [PMID: 35139496 DOI: 10.1088/2050-6120/ac5389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Accepted: 02/09/2022] [Indexed: 11/12/2022]
Abstract
The use of phasors to analyze fluorescence data was first introduced for time-resolved studies for a simpler mathematical analysis of the fluorescence-decay curves. Recently, this approach was extended to steady-state experiments with the introduction of the spectral phasors (SP), derived from the Fourier transform of the fluorescence emission spectrum. In this work, we revise key mathematical aspects that lead to an interpretation of SP as the characteristic function of a probability distribution. This formalism allows us to introduce a new tool, called multi-dimensional spectral phasor (MdSP) that seize, not only the information from the emission spectrum, but from the full excitation-emission matrix (EEM). In addition, we developed a homemade open-source Java software to facilitate the MdSP data processing. Due to this mathematical conceptualization, we settled a mechanism for the use of MdSP as a tool to tackle spectral signal unmixing problems in a more accurate way than SP. As a proof of principle, with the use of MdSP we approach two important biophysical questions: protein conformational changes and protein-ligand interactions. Specifically, we experimentally measure the EEM changes upon denaturation of human serum albumin (HSA) or during its association with the fluorescence dye 1,8-anilinonaphtalene sulphate (ANS) detected via tryptophan-ANS Förster Resonance Energy Transfer (FRET). In this sense, MdSP allows us to obtain information of the system in a simpler and finer way than the traditional SP. Specifically, understanding a protein's EEM as a molecular fingerprint opens new doors for the use of MdSP as a tool to analyze and comprehend protein conformational changes and interactions.
Collapse
Affiliation(s)
- Luis Bp Socas
- Química Biológica, Centro de Investigaciones en Química Biológica de Córdoba, Haya de la Torre y Medina Allende s/n, Cordoba, Córdoba, X5000HUA, ARGENTINA
| | - Ernesto Esteban Ambroggio
- Química Biológica, CIQUIBIC Química Biológica, Haya de la Torre y Medina Allende s/n, Cordoba, X5000HUA, ARGENTINA
| |
Collapse
|
8
|
Mukherjee M, Saha Sardar P, Basu Roy M, Mukherjee P, Ghosh R, Ghosh S. Tracking Zone-wise perturbation during unfolding of some globular proteins using Eu(III) complex of Tetracycline as a probe exhibiting Stark splitting. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 264:120231. [PMID: 34365134 DOI: 10.1016/j.saa.2021.120231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 07/14/2021] [Accepted: 07/24/2021] [Indexed: 06/13/2023]
Abstract
Enhanced 'Antenna effect' of a suitably designed ternary complex of Eu(III), Tetracycline hydrochloride (TC) and globular proteins viz bovine serum albumin (BSA), human serum albumin (HSA) and β-lactoglobulin A (BLGA) in aqueous medium is employed to characterize the different partially unfolded states along with investigation of the micro- heterogeneous environment of the proteins during their stepwise unfolding. The zone-wise perturbation for the proteins upon denaturation by Urea and Guanidine hydrochloride (Gdn. HCl) is followed by the emission of Eu(III) through 'Antenna Effect' and that of the tryptophan (Trp) residues of the proteins as a function of denaturants both by steady state and time resolved emission study. With Gdn. HCl as denaturant, both BSA and BLGA show quenching of Eu(III) emission compared to pure protein while HSA exhibits an enhancement of antenna effect during unfolding as compared to that in its absence. In the presence of Urea, HSA and BSA show enhancement of antenna effect accompanied by Stark splitting of the 5D0→7F2 transition of Eu(III) although BLGA follows the similar pattern of quenching of Eu(III) emission as observed with Gdn. HCl without any Stark splitting. The proteins exhibit a two state transition with ΔGD values of ~ 2-3 kcal mol-1. Thus the use of Eu(III) emission as an efficient probe is advocating here to rationalize the microenvironment of the proteins during their stepwise unfolding.
Collapse
Affiliation(s)
- Moumita Mukherjee
- Present Address: Sri Aurobindo Vidyamandir, Chandannagar, Hoogly, West Bengal, India
| | - Pinki Saha Sardar
- Department of Chemistry, The Bhawanipur Education Society College, Kolkata-700020, West Bengal, India
| | - Maitrayee Basu Roy
- Department of Chemistry, Vidyasagar College for Women, Kolkata-700006, West Bengal, India
| | - Priyanka Mukherjee
- Department of Chemistry and Biochemistry, Asutosh College, Kolkata-700026, India
| | - Rina Ghosh
- Department of Chemistry, St. Xavier's College, Kolkata-700013, India
| | - Sanjib Ghosh
- Department of Chemistry, Adamas University, Barasat, West Bengal, India.
| |
Collapse
|
9
|
Siddiqui GA, Naeem A. Refolding of Hemoglobin Under Macromolecular Confinement: Impersonating In Vivo Volume Exclusion. J Fluoresc 2021; 31:1371-1377. [PMID: 34156613 DOI: 10.1007/s10895-021-02751-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Accepted: 05/20/2021] [Indexed: 11/27/2022]
Abstract
Biomacromolecules evolve and function inside the cell under crowded conditions. The effect of macromolecular crowding and confinement on nature and interactions of biomacromolecules cannot be ruled out. This study demonstrates the effect of volume exclusion due to macromolecular crowding on refolding rate of Gn-HCl induced unfolded hemoglobin. The in vivo like crowding milieu was created using dextran 70. Unfolding of Hb was followed by the absorbance at 280 nm and intrinsic fluorescence intensity along with a bathochromic shift that shows the destabilization of Hb in the presence of the denaturing agent. This was supported by a decrease in soret absorbance, increased hydrodynamic radii and loss in secondary structure, evidenced from dynamic light scattering and circular dichroism experiments respectively. Refolding process of Hb was followed by an increase in soret absorbance, decrease in intrinsic fluorescence intensity with a hypsochromic shift, decreased hydrodynamic radii and gain in secondary structural content. The results revealed that the effect of confinement and volume exclusion is insignificant on the process of Hb refolding.
Collapse
Affiliation(s)
- Gufran Ahmed Siddiqui
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, 202002, UP, India
| | - Aabgeena Naeem
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, 202002, UP, India.
| |
Collapse
|
10
|
Xu YD, Lai RY, Procházková E, Stenzel MH. Saturation Transfer Difference NMR Spectroscopy for the Elucidation of Supramolecular Albumin-Polymer Interactions. ACS Macro Lett 2021; 10:819-824. [PMID: 35549199 DOI: 10.1021/acsmacrolett.1c00270] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Albumin has consistently demonstrated its potential for enhancing the delivery of drugs and polymer-drug conjugates, binding via supramolecular forces within its multiple binding sites. Herein, we introduce saturation transfer difference (STD-NMR) as a method to identify the interactions between a polymer library and bovine serum albumin (BSA). With STD-NMR, the binding ability of polymers can be quickly screened by focusing on their individual structural features, making this technique more suitable for high throughput screening in comparison to traditional fluorescence studies.
Collapse
Affiliation(s)
- You D. Xu
- Centre for Advanced Macromolecular Design, School of Chemistry, The University of New South Wales, Sydney 2052, NSW, Australia
| | - Rebecca Y. Lai
- Centre for Advanced Macromolecular Design, School of Chemistry, The University of New South Wales, Sydney 2052, NSW, Australia
| | - Eliška Procházková
- Institute of Organic Chemistry and Biochemistry, The Czech Academy of Sciences, Prague 166 10, Czech Republic
| | - Martina H. Stenzel
- Centre for Advanced Macromolecular Design, School of Chemistry, The University of New South Wales, Sydney 2052, NSW, Australia
| |
Collapse
|
11
|
Gordon F, Elcoroaristizabal S, Ryder AG. Modelling Förster resonance energy transfer (FRET) using anisotropy resolved multi-dimensional emission spectroscopy (ARMES). Biochim Biophys Acta Gen Subj 2020; 1865:129770. [PMID: 33214128 DOI: 10.1016/j.bbagen.2020.129770] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 10/09/2020] [Accepted: 10/19/2020] [Indexed: 12/01/2022]
Abstract
BACKGROUND Förster Resonance Energy Transfer (FRET) is widely used to study the structure and dynamics of biomolecular systems and also causes the non-linear fluorescence response observed in multi-fluorophore proteins. Accurate FRET analysis, in terms of measuring changes in donor and acceptor spectra and energy transfer efficiency is therefore critical. METHODS We demonstrate a novel quantitative FRET analysis using anisotropy resolved multidimensional emission spectroscopy (ARMES) in a Human Serum Albumin (HSA) and 1,8-anilinonaphathalene sulfonate (ANS) model. ARMES combines 4D measurement of polarized excitation emission matrices (pEEM) with multivariate data analysis to spectrally resolve contributing fluorophores. Multivariate analysis (Parallel Factor, PARAFAC and restricted Tucker3) was used to resolve fluorophore contributions and for modelling the quenching of HSA emission and the HSA-ANS interactions. RESULTS pEEM spectra were modelled using Tucker3 which accommodates non-linearities introduced by FRET and a priori chemical knowledge was used to optimise the solution, thus resolving three components: HSA emission, ANS emission from indirect FRET excitation, and ANS emission from direct excitation. Perpendicular emission measurements were more sensitive to indirectly excited acceptor emission. PARAFAC modelling of HSA, donor emission, separated ANS FRET interacting (Tryptophan) and non-interacting (Tyrosine) components. This enabled a new way of calculating quenching constants using the multi-dimensional emission of individual donor fluorophores. CONCLUSIONS FRET efficiency could be calculated using the multi-dimensional, resolved emission of the interacting donor fluorophores only which yielded higher ET efficiencies compared to conventional methods. GENERAL SIGNIFICANCE Shows the potential of multidimensional fluorescence measurements and data analysis for more accurate FRET modelling in proteins.
Collapse
Affiliation(s)
- Fiona Gordon
- Nanoscale BioPhotonics Laboratory, School of Chemistry, National University of Ireland, Galway, Galway H91 CF50, Ireland.
| | - Saioa Elcoroaristizabal
- Nanoscale BioPhotonics Laboratory, School of Chemistry, National University of Ireland, Galway, Galway H91 CF50, Ireland.
| | - Alan G Ryder
- Nanoscale BioPhotonics Laboratory, School of Chemistry, National University of Ireland, Galway, Galway H91 CF50, Ireland.
| |
Collapse
|
12
|
Kuhar N, Umapathy S. Probing the Stepwise Unfolding of Bovine Serum Albumin Using 2D Correlation Raman Spectroscopic Analysis. Anal Chem 2020; 92:13509-13517. [DOI: 10.1021/acs.analchem.0c02968] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nikki Kuhar
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Siva Umapathy
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
- Department of Instrumentation & Applied Physics, Indian Institute of Science, Bangalore 560012, India
| |
Collapse
|
13
|
Mirdha L, Chakraborty H. Fluorescence quenching by ionic liquid as a potent tool to study protein unfolding intermediates. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113408] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
|
14
|
Khoury LR, Popa I. Chemical unfolding of protein domains induces shape change in programmed protein hydrogels. Nat Commun 2019; 10:5439. [PMID: 31784506 PMCID: PMC6884551 DOI: 10.1038/s41467-019-13312-0] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2019] [Accepted: 10/30/2019] [Indexed: 12/31/2022] Open
Abstract
Programmable behavior combined with tailored stiffness and tunable biomechanical response are key requirements for developing successful materials. However, these properties are still an elusive goal for protein-based biomaterials. Here, we use protein-polymer interactions to manipulate the stiffness of protein-based hydrogels made from bovine serum albumin (BSA) by using polyelectrolytes such as polyethyleneimine (PEI) and poly-L-lysine (PLL) at various concentrations. This approach confers protein-hydrogels with tunable wide-range stiffness, from ~10-64 kPa, without affecting the protein mechanics and nanostructure. We use the 6-fold increase in stiffness induced by PEI to program BSA hydrogels in various shapes. By utilizing the characteristic protein unfolding we can induce reversible shape-memory behavior of these composite materials using chemical denaturing solutions. The approach demonstrated here, based on protein engineering and polymer reinforcing, may enable the development and investigation of smart biomaterials and extend protein hydrogel capabilities beyond their conventional applications.
Collapse
Affiliation(s)
- Luai R Khoury
- Department of Physics, University of Wisconsin-Milwaukee, 3135 North Maryland Ave., Milwaukee, WI, 53211, USA.
| | - Ionel Popa
- Department of Physics, University of Wisconsin-Milwaukee, 3135 North Maryland Ave., Milwaukee, WI, 53211, USA.
| |
Collapse
|
15
|
Khoury LR, Nowitzke J, Shmilovich K, Popa I. Study of Biomechanical Properties of Protein-Based Hydrogels Using Force-Clamp Rheometry. Macromolecules 2018. [DOI: 10.1021/acs.macromol.7b02160] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Luai R. Khoury
- Department of Physics, University of Wisconsin—Milwaukee, 3135 North Maryland Ave., Milwaukee, Wisconsin 53211, United States
| | - Joel Nowitzke
- Department of Physics, University of Wisconsin—Milwaukee, 3135 North Maryland Ave., Milwaukee, Wisconsin 53211, United States
| | - Kirill Shmilovich
- Department of Physics, University of Wisconsin—Milwaukee, 3135 North Maryland Ave., Milwaukee, Wisconsin 53211, United States
| | - Ionel Popa
- Department of Physics, University of Wisconsin—Milwaukee, 3135 North Maryland Ave., Milwaukee, Wisconsin 53211, United States
| |
Collapse
|
16
|
Zhang N, Tu Z, Wang H, Liu G, Wang Z, Huang T, Qin X, Xie X, Wang A. Liquid Chromatography High-Resolution Mass Spectrometry Identifies the Glycation Sites of Bovine Serum Albumin Induced by d-Ribose with Ultrasonic Treatment. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:563-570. [PMID: 29280631 DOI: 10.1021/acs.jafc.7b04578] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Ultrasonication is an emerging technology applied in food processing and biological experimental pretreatments. Cavitation phenomena induced during ultrasonic treatment can generate localized high temperature and pressure, which can result in glycation reaction between protein and reducing sugars. In this study, the mixture of bovine serum albumin (BSA) and d-ribose was treated under 600 W for different times. Interestingly, a large amount of carbonized black materials appeared after ultrasonication, while the UV absorbance and intrinsic fluorescence spectra reflecting conformational changes were not obvious. Only 12 sites (11 lysines and 1 arginine) of the BSA with ribose under ultrasonic treatment for 35 min were identified through liquid chromatography high-resolution mass spectrometry (LCHR-MS). K547, K548, R359/R360, and K587 were the most reactive glycated sites, with the average degree of substitution per peptide molecule (DSP) value ranging from 15 to 35%. The glycated modification was distributed not only in domain III, but also in domains I and II. The glycated modification could occur during ultrasonic treatment, thereby influencing the properties of biomacromolecule after extraction.
Collapse
Affiliation(s)
- Nanhai Zhang
- State Key Laboratory of Food Science and Technology, Nanchang University , Nanchang, Jiangxi 330047, China
| | - Zongcai Tu
- State Key Laboratory of Food Science and Technology, Nanchang University , Nanchang, Jiangxi 330047, China
- College of Life Sciences, Jiangxi Normal University , Nanchang, Jiangxi 330022, China
| | - Hui Wang
- State Key Laboratory of Food Science and Technology, Nanchang University , Nanchang, Jiangxi 330047, China
| | - Guangxian Liu
- College of Life Sciences, Jiangxi Normal University , Nanchang, Jiangxi 330022, China
- Jiangxi Academy of Agricultural Sciences , Nanchang, Jiangxi 330200, China
| | - Zhenxing Wang
- College of Life Sciences, Jiangxi Normal University , Nanchang, Jiangxi 330022, China
| | - Tao Huang
- State Key Laboratory of Food Science and Technology, Nanchang University , Nanchang, Jiangxi 330047, China
| | - Xu Qin
- State Key Laboratory of Food Science and Technology, Nanchang University , Nanchang, Jiangxi 330047, China
| | - Xing Xie
- State Key Laboratory of Food Science and Technology, Nanchang University , Nanchang, Jiangxi 330047, China
| | - A'mei Wang
- State Key Laboratory of Food Science and Technology, Nanchang University , Nanchang, Jiangxi 330047, China
| |
Collapse
|
17
|
Isothermal chemical denaturation of large proteins: Path-dependence and irreversibility. Anal Biochem 2017; 539:60-69. [DOI: 10.1016/j.ab.2017.10.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 09/29/2017] [Accepted: 10/02/2017] [Indexed: 12/16/2022]
|
18
|
Accurate anisotropy recovery from fluorophore mixtures using Multivariate Curve Resolution (MCR). Anal Chim Acta 2017; 1000:132-143. [PMID: 29289302 DOI: 10.1016/j.aca.2017.11.031] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Revised: 11/12/2017] [Accepted: 11/16/2017] [Indexed: 11/21/2022]
Abstract
Anisotropy resolved multidimensional emission spectroscopy (ARMES) provides valuable insights into multi-fluorophore systems like proteins that have complex overlapping emission bands. The method combines multidimensional fluorescence, anisotropy, and chemometrics to facilitate the differentiation of fluorophores with very similar emission properties. Here, we address the critical issue of standardizing the chemometric methods required to accurately extract spectral and anisotropy information from fluorophore mixtures using two standard sample sets: perylene in glycerol, and a mixture of Erythrosin B and Phloxine B with overlapping emission but different anisotropies. We show for the first time how to accurately model component anisotropy using Multivariate Curve Resolution (MCR) from data collected using total synchronous fluorescence scan (TSFS) and Excitation Emission Matrix (EEM) measurement methods. These datasets were selected to avoid the presence of inner filter effects (IFE) or Förster resonance energy transfer (FRET) that would depolarize fluorescence emission or reduce data tri-linearity. This allowed the non-trilinear TSFS data to yield accurate component anisotropy data once modelled using the correct data augmentation strategy, however, the EEM data proved to be more accurate once optimal constraints (non-negativity and correspondence among species) were employed. For perylene (S2) and Phloxine B which both have very weak anisotropy (<0.06), while the spectral recovery was excellent, the modelled anisotropy values were reasonably accurate (±20% of the real value) because of large relative noise contributions. However, for perylene (S1) and Erythrosin B which have large (>0.2) anisotropies, bilinear and trilinear EEM models built using a total tri-linearity constraint, yielded solutions without any rotational ambiguities and very accurate (±4% of real value) anisotropy values. These sample systems thus provide simple and robust test systems for validating the spectral measurement and chemometric data analysis elements of ARMES.
Collapse
|
19
|
Casamayou-Boucau Y, Ryder AG. Extended wavelength anisotropy resolved multidimensional emission spectroscopy (ARMES) measurements: better filters, validation standards, and Rayleigh scatter removal methods. Methods Appl Fluoresc 2017; 5:037001. [PMID: 28584197 DOI: 10.1088/2050-6120/aa7763] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Anisotropy resolved multidimensional emission spectroscopy (ARMES) provides valuable insights into multi-fluorophore proteins (Groza et al 2015 Anal. Chim. Acta 886 133-42). Fluorescence anisotropy adds to the multidimensional fluorescence dataset information about the physical size of the fluorophores and/or the rigidity of the surrounding micro-environment. The first ARMES studies used standard thin film polarizers (TFP) that had negligible transmission between 250 and 290 nm, preventing accurate measurement of intrinsic protein fluorescence from tyrosine and tryptophan. Replacing TFP with pairs of broadband wire grid polarizers enabled standard fluorescence spectrometers to accurately measure anisotropies between 250 and 300 nm, which was validated with solutions of perylene in the UV and Erythrosin B and Phloxine B in the visible. In all cases, anisotropies were accurate to better than ±1% when compared to literature measurements made with Glan Thompson or TFP polarizers. Better dual wire grid polarizer UV transmittance and the use of excitation-emission matrix measurements for ARMES required complete Rayleigh scatter elimination. This was achieved by chemometric modelling rather than classical interpolation, which enabled the acquisition of pure anisotropy patterns over wider spectral ranges. In combination, these three improvements permit the accurate implementation of ARMES for studying intrinsic protein fluorescence.
Collapse
Affiliation(s)
- Yannick Casamayou-Boucau
- Nanoscale BioPhotonics Laboratory, School of Chemistry, National University of Ireland, Galway, Ireland
| | | |
Collapse
|
20
|
Yeh YQ, Liao KF, Shih O, Shiu YJ, Wu WR, Su CJ, Lin PC, Jeng US. Probing the Acid-Induced Packing Structure Changes of the Molten Globule Domains of a Protein near Equilibrium Unfolding. J Phys Chem Lett 2017; 8:470-477. [PMID: 28067527 DOI: 10.1021/acs.jpclett.6b02722] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Using simultaneously scanning small-angle X-ray scattering (SAXS) and UV-vis absorption with integrated online size exclusion chromatography, supplemental with molecular dynamics simulations, we unveil the long-postulated global structure evolution of a model multidomain protein bovine serum albumin (BSA) during acid-induced unfolding. Our results differentiate three global packing structures of the three molten globule domains of BSA, forming three intermediates I1, I2, and E along the unfolding pathway. The I1-I2 transition, overlooked in all previous studies, involves mainly coordinated reorientations across interconnected molten globule subdomains, and the transition activates a critical pivot domain opening of the protein for entering into the E form, with an unexpectedly large unfolding free energy change of -9.5 kcal mol-1, extracted based on the observed packing structural changes. The revealed local packing flexibility and rigidity of the molten globule domains in the E form elucidate how collective motions of the molten globule domains profoundly influence the folding-unfolding pathway of a multidomain protein.
Collapse
Affiliation(s)
- Yi-Qi Yeh
- National Synchrotron Radiation Research Center , Hsinchu 30076, Taiwan
| | - Kuei-Fen Liao
- National Synchrotron Radiation Research Center , Hsinchu 30076, Taiwan
| | - Orion Shih
- National Synchrotron Radiation Research Center , Hsinchu 30076, Taiwan
| | - Ying-Jen Shiu
- National Synchrotron Radiation Research Center , Hsinchu 30076, Taiwan
| | - Wei-Ru Wu
- National Synchrotron Radiation Research Center , Hsinchu 30076, Taiwan
| | - Chun-Jen Su
- National Synchrotron Radiation Research Center , Hsinchu 30076, Taiwan
| | - Po-Chang Lin
- National Synchrotron Radiation Research Center , Hsinchu 30076, Taiwan
| | - U-Ser Jeng
- National Synchrotron Radiation Research Center , Hsinchu 30076, Taiwan
- Department of Chemical Engineering, National Tsing Hua University , Hsinchu 30013, Taiwan
| |
Collapse
|
21
|
Pereira-Vilar A, Martin-Pastor M, Pessêgo M, García-Río L. Supramolecular Recognition Induces Nonsynchronous Change of Dye Fluorescence Properties. J Org Chem 2016; 81:6587-95. [DOI: 10.1021/acs.joc.6b01230] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alba Pereira-Vilar
- Centro
Singular de Investigación en Química Biolóxica
e Materiais Moleculares (CIQUS), Departamento de Química Física, Universidade de Santiago de Compostela, 15782 Santiago
de Compostela, Spain
| | - Manuel Martin-Pastor
- Unidad
de Resonancia Magnética (RIAIDT), Edif. CACTUS, Universidade de Santiago de Compostela, 15782 Santiago
de Compostela, Spain
| | - Marcia Pessêgo
- Laboratório
Associado para a Química Verde (LAQV), REQUIMTE, Departamento
de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516 Monte de Caparica, Portugal
| | - Luis García-Río
- Centro
Singular de Investigación en Química Biolóxica
e Materiais Moleculares (CIQUS), Departamento de Química Física, Universidade de Santiago de Compostela, 15782 Santiago
de Compostela, Spain
| |
Collapse
|
22
|
On prilled Nanotubes-in-Microgel Oral Systems for protein delivery. Eur J Pharm Biopharm 2016; 101:90-102. [DOI: 10.1016/j.ejpb.2016.01.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Revised: 11/19/2015] [Accepted: 01/20/2016] [Indexed: 11/20/2022]
|
23
|
Sahin Z, Demir YK, Kayser V. Global kinetic analysis of seeded BSA aggregation. Eur J Pharm Sci 2016; 86:115-24. [DOI: 10.1016/j.ejps.2016.03.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2015] [Revised: 03/08/2016] [Accepted: 03/08/2016] [Indexed: 10/22/2022]
|
24
|
Upadhyay A, Dalvi SV. Synthesis, characterization and stability of BSA-encapsulated microbubbles. RSC Adv 2016. [DOI: 10.1039/c5ra24304a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this work, we present an account of experimental studies performed for the synthesis, shelf stability andin vitrostability of microbubbles made from perfluorobutane (PFB) gas and coated in a shell of Bovine Serum Albumin (BSA).
Collapse
Affiliation(s)
- Awaneesh Upadhyay
- Chemical Engineering
- Indian Institute of Technology Gandhinagar
- Chandkheda 382424
- India
| | - Sameer V. Dalvi
- Chemical Engineering
- Indian Institute of Technology Gandhinagar
- Chandkheda 382424
- India
| |
Collapse
|
25
|
Groza RC, Li B, Ryder AG. Anisotropy resolved multidimensional emission spectroscopy (ARMES): A new tool for protein analysis. Anal Chim Acta 2015; 886:133-42. [PMID: 26320645 DOI: 10.1016/j.aca.2015.06.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Revised: 06/02/2015] [Accepted: 06/04/2015] [Indexed: 01/23/2023]
Abstract
Structural analysis of proteins using the emission of intrinsic fluorophores is complicated by spectral overlap. Anisotropy resolved multidimensional emission spectroscopy (ARMES) overcame the overlap problem by the use of anisotropy, with chemometric analysis, to better resolve emission from different fluorophores. Total synchronous fluorescence scan (TSFS) provided information about all the fluorophores that contributed to emission while anisotropy provided information about the environment of each fluorophore. Here the utility of ARMES was demonstrated via study of the chemical and thermal denaturation of human serum albumin (HSA). Multivariate curve resolution (MCR) analysis of the constituent polarized emission ARMES data resolved contributions from four emitters: fluorescence from tryptophan (Trp), solvent exposed tyrosine (Tyr), Tyr in a hydrophobic environment, and room temperature phosphorescence (RTP) from Trp. The MCR scores, anisotropy, and literature validated these assignments and showed all the expected transitions during HSA unfolding. This new methodology for comprehensive intrinsic fluorescence analysis of proteins is applicable to any protein containing multiple fluorophores.
Collapse
Affiliation(s)
- Radu Constantin Groza
- Nanoscale Biophotonics Laboratory, School of Chemistry, National University of Ireland, Galway, Galway, Ireland
| | - Boyan Li
- Nanoscale Biophotonics Laboratory, School of Chemistry, National University of Ireland, Galway, Galway, Ireland
| | - Alan G Ryder
- Nanoscale Biophotonics Laboratory, School of Chemistry, National University of Ireland, Galway, Galway, Ireland.
| |
Collapse
|
26
|
Pham K, Dhulipala G, Gonzalez WG, Gerstman BS, Regmi C, Chapagain PP, Miksovska J. Ca2+ and Mg2+ modulate conformational dynamics and stability of downstream regulatory element antagonist modulator. Protein Sci 2015; 24:741-51. [PMID: 25627705 DOI: 10.1002/pro.2646] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Accepted: 01/25/2015] [Indexed: 11/09/2022]
Abstract
Downstream Regulatory Element Antagonist Modulator (DREAM) belongs to the family of neuronal calcium sensors (NCS) that transduce the intracellular changes in Ca(2+) concentration into a variety of responses including gene expression, regulation of Kv channel activity, and calcium homeostasis. Despite the significant sequence and structural similarities with other NCS members, DREAM shows several features unique among NCS such as formation of a tetramer in the apo-state, and interactions with various intracellular biomacromolecules including DNA, presenilin, Kv channels, and calmodulin. Here we use spectroscopic techniques in combination with molecular dynamics simulation to study conformational changes induced by Ca(2+) /Mg(2+) association to DREAM. Our data indicate a minor impact of Ca(2+) association on the overall structure of the N- and C-terminal domains, although Ca(2+) binding decreases the conformational heterogeneity as evident from the decrease in the fluorescence lifetime distribution in the Ca(2+) bound forms of the protein. Time-resolved fluorescence data indicate that Ca(2+) binding triggers a conformational transition that is characterized by more efficient quenching of Trp residue. The unfolding of DREAM occurs through an partially unfolded intermediate that is stabilized by Ca(2+) association to EF-hand 3 and EF-hand 4. The native state is stabilized with respect to the partially unfolded state only in the presence of both Ca(2+) and Mg(2+) suggesting that, under physiological conditions, Ca(2+) free DREAM exhibits a high conformational flexibility that may facilitate its physiological functions.
Collapse
Affiliation(s)
- Khoa Pham
- Department of Chemistry and Biochemistry, Florida International University, Miami, Florida, 33199
| | | | | | | | | | | | | |
Collapse
|
27
|
Mishra A, Malakar A, Biswal HT, Barman MK, Krishnamoorthy G. Interactions of a few azole derivatives with a transport protein: role of heteroatoms. J Mol Recognit 2015; 28:299-305. [DOI: 10.1002/jmr.2444] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Revised: 10/24/2014] [Accepted: 10/27/2014] [Indexed: 11/08/2022]
Affiliation(s)
- Anasuya Mishra
- Department of Chemistry; Indian Institute of Technology Guwahati; Guwahati 781039 India
| | - Ashim Malakar
- Department of Chemistry; Indian Institute of Technology Guwahati; Guwahati 781039 India
| | - Himadree T. Biswal
- Department of Chemistry; Indian Institute of Technology Guwahati; Guwahati 781039 India
| | - Monoj K. Barman
- Department of Chemistry; Indian Institute of Technology Guwahati; Guwahati 781039 India
| | - G. Krishnamoorthy
- Department of Chemistry; Indian Institute of Technology Guwahati; Guwahati 781039 India
| |
Collapse
|
28
|
Gospodarek AM, Sun W, O’Connell JP, Fernandez EJ. Structures of multidomain proteins adsorbed on hydrophobic interaction chromatography surfaces. J Chromatogr A 2014; 1371:204-19. [DOI: 10.1016/j.chroma.2014.10.080] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Revised: 10/08/2014] [Accepted: 10/25/2014] [Indexed: 11/17/2022]
|
29
|
De Kruif JK, Fasler‐Kan E, Varum F, Bravo R, Kuentz M. On Prilling of Hydrophilic Microgels in Lipid Dispersions Using Mono‐N‐Carboxymethyl Chitosan for Oral Biologicals Delivery. J Pharm Sci 2014; 103:3675-3687. [DOI: 10.1002/jps.24172] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Revised: 08/13/2014] [Accepted: 08/26/2014] [Indexed: 11/08/2022]
|
30
|
Jiang Y, Lu H, Khine YY, Dag A, Stenzel MH. Polyion complex micelle based on albumin-polymer conjugates: multifunctional oligonucleotide transfection vectors for anticancer chemotherapeutics. Biomacromolecules 2014; 15:4195-205. [PMID: 25290019 DOI: 10.1021/bm501205x] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Novel biocompatible polyion complex micelles, containing bovine serum albumin (BSA), polymer, and oligonucleotide, were synthesized as a generation of vectors for the gene transfection. Maleimide-terminated poly((N,N-dimethyl amino) ethyl methacrylate) (PDMAEMA) was prepared via reversible addition-fragmentation chain transfer (RAFT) polymerization and subsequently deprotected. Precise one to one albumin-PDMAEMA bioconjugates have been achieved via 1,4-addition with the free thiol group on Cys34 on the BSA protein. SDS-PAGE and GPC (water) confirmed and quantified the successful conjugation. The conjugation efficiency was found to be independent of the molecular weight of PDMAEMA. After careful pH adjustment, the conjugate could efficiently condense anticancer oligonucleotide, ISIS 5132, which resulted in particles of 15-35 nm with a negative zeta-potential. The size was easily controlled by the polymer chain length. The albumin corona provides complete protection of the cationic polymer and genetic drug, which gave rise to lower potential toxicity from the polymer and higher gene transfection efficiency. Although a control experiment with a traditional PEG-based polyion complex micelle could deliver the drug just as effectively, if not more so, to the ovarian cancer cell line OVCAR-3, this carrier had no selectivity toward cancerous cells and proved just as toxic to HS27 (fibroblast) cell line. In contrast, the albumin-coated particles demonstrated desirable selectivity toward cancerous cells and have been shown to have outstanding performance in the cytotoxicity tests of several carcinoma monolayer cell models. In addition, the complex micelles were able to destroy pancreatic multicellular tumor spheroids, while free ISIS 5132 could not penetrate the spheroid at all. Hence, albumin-coated/oligonucleotide complex micelles are far more promising than the most classical gene delivery vectors.
Collapse
Affiliation(s)
- Yanyan Jiang
- Centre for Advanced Macromolecular Design (CAMD), School of Chemistry, University of New South Wales , Sydney, NSW 2052, Australia
| | | | | | | | | |
Collapse
|
31
|
Structural changes of ultrasonicated bovine serum albumin revealed by hydrogen–deuterium exchange and mass spectrometry. Anal Bioanal Chem 2014; 406:7243-51. [DOI: 10.1007/s00216-014-8136-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2014] [Revised: 08/18/2014] [Accepted: 08/26/2014] [Indexed: 10/24/2022]
|
32
|
Kaur R, Mahajan RK. Twin-tailed surfactant induced conformational changes in bovine serum albumin: a detailed spectroscopic and physicochemical study. RSC Adv 2014. [DOI: 10.1039/c4ra03653k] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
33
|
Huang X, Tu Z, Wang H, Zhang Q, Hu Y, Zhang L, Niu P, Shi Y, Xiao H. Glycation promoted by dynamic high pressure microfluidisation pretreatment revealed by high resolution mass spectrometry. Food Chem 2013; 141:3250-9. [DOI: 10.1016/j.foodchem.2013.05.159] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2013] [Revised: 05/15/2013] [Accepted: 05/20/2013] [Indexed: 11/16/2022]
|
34
|
Pabbathi A, Patra S, Samanta A. Structural transformation of bovine serum albumin induced by dimethyl sulfoxide and probed by fluorescence correlation spectroscopy and additional methods. Chemphyschem 2013; 14:2441-9. [PMID: 23780704 DOI: 10.1002/cphc.201300313] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2013] [Revised: 05/01/2013] [Indexed: 11/10/2022]
Abstract
Determining the structure of a protein and its transformation under different conditions is key to understanding its activity. The structural stability and activity of proteins in aqueous-organic solvent mixtures, which is an intriguing topic of research in biochemistry, is dependent on the nature of the protein and the properties of the medium. Herein, the effect of a commonly used cosolvent, dimethyl sulfoxide (DMSO), on the structure and conformational dynamics of bovine serum albumin (BSA) protein is studied by fluorescence correlation spectroscopy (FCS) measurements on fluorescein isothiocyanate (FITC)-labeled BSA. The FCS study reveals a change of the hydrodynamic radius of BSA from 3.7 nm in the native state to 7.0 nm in the presence of 40% DMSO, which suggests complete unfolding of the protein under these conditions. Fluorescence self-quenching of FITC has been exploited to understand the conformational dynamics of BSA. The time constant of the conformational dynamics of BSA is found to change from 35 μs in its native state to 50 μs as the protein unfolds with increasing DMSO concentration. The FCS results are corroborated by the near-UV circular dichroism spectra of the protein, which suggest a loss of its tertiary structure with increasing concentration of DMSO. The intrinsic fluorescence of BSA and the fluorescence response of 1-anilinonaphthalene-8-sulfonic acid, used as a probe molecule, provide information that is consistent with the FCS measurements, except that aggregation of BSA is observed in the presence of 40% DMSO in the ensemble measurements.
Collapse
Affiliation(s)
- Ashok Pabbathi
- School of Chemistry, University of Hyderabad, Gachi Bowli, Hyderabad, India
| | | | | |
Collapse
|
35
|
Dash N, Mishra A, Krishnamoorthy G. Alkyl chain dependent interactions of ligands with bovine serum albumin. J Pharm Biomed Anal 2013; 77:55-62. [DOI: 10.1016/j.jpba.2013.01.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2012] [Revised: 12/16/2012] [Accepted: 01/01/2013] [Indexed: 10/27/2022]
|
36
|
Lystvet SM, Volden S, Singh G, Yasuda M, Halskau Ø, Glomm WR. Tunable photophysical properties, conformation and function of nanosized protein–gold constructs. RSC Adv 2013. [DOI: 10.1039/c2ra22479h] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
37
|
Bakkialakshmi S, Chandrakala D. A spectroscopic investigations of anticancer drugs binding to bovine serum albumin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 88:2-9. [PMID: 22226896 DOI: 10.1016/j.saa.2011.10.076] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2011] [Revised: 10/15/2011] [Accepted: 10/28/2011] [Indexed: 05/31/2023]
Abstract
The binding of anticancer drugs (i) Uracil (U), (ii) 5-Fluorouracil (5FU) and (iii) 5-Chlorouracil (5ClU), to bovine serum albumin (BSA) at two levels of temperature was studied by the fluorescence of quenching method. UV/Vis, time-resolved fluorescence, Fourier transform infrared spectroscopy (FTIR), proton nuclear magnetic resonance ((1)H NMR) and scanning electron microscope (SEM) analyses were also made. Binding constants (K(a)) and binding sites (n) at various levels of temperature were calculated. The obtained binding sites were found to be equal to one for all the three quenchers (U, 5FU and 5ClU) at two different temperature levels. Thermodynamic parameters ΔH, ΔG and ΔS have been calculated and were presented in tables. Change in FTIR absorption intensity shows strong binding of anticancer drugs to BSA. Changes in chemical shifts of NMR and fluorescence lifetimes of the drugs indicate the presence of interaction and binding of BSA to anticancer drugs. (1)H NMR spectra and SEM photographs also conform this binding.
Collapse
Affiliation(s)
- S Bakkialakshmi
- Department of Physics, Annamalai University, Annamalai nagar, Tamil Nadu, India.
| | | |
Collapse
|
38
|
Cigarette smoke induces p-benzoquinone–albumin adduct in blood serum: Implications on structure and ligand binding properties. Toxicology 2012; 292:78-89. [DOI: 10.1016/j.tox.2011.11.014] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2011] [Revised: 10/31/2011] [Accepted: 11/22/2011] [Indexed: 11/22/2022]
|
39
|
Site-selective probe for investigating the asynchronous unfolding of domains in bovine serum albumin. Talanta 2011; 84:881-6. [DOI: 10.1016/j.talanta.2011.02.027] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2010] [Revised: 02/09/2011] [Accepted: 02/16/2011] [Indexed: 11/20/2022]
|
40
|
Lystvet SM, Volden S, Yasuda M, Halskau Ø, Glomm WR. Emergent membrane-affecting properties of BSA-gold nanoparticle constructs. NANOSCALE 2011; 3:1788-1797. [PMID: 21359387 DOI: 10.1039/c0nr00948b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
By adsorbing bovine serum albumin (BSA) on gold nanoparticles (Aunps) with diameters 30 nm and 80 nm, different degrees of protein unfolding were obtained. Adsorption and adlayer conformation were characterized by UV-vis spectroscopy, ζ-potential measurements, steady-state and time-resolved fluorescence. The unfolding was also studied using 1-anilino-8-naphthalene sulfonate (ANS) as an extrinsic probe, showing that BSA unfolds more on 80 nm Aunp than on 30 nm Aunp. Langmuir monolayer studies using two distinct methods of introducing the BSA and BSA-Aunp constructs accompanied with Brewster Angle Microscopy (BAM) and Digital Video Microscope (DVM) imaging demonstrated that BSA-Aunp constructs induce film miscibility with L-α-phosphatidylethanolamine not seen for BSA or Aunp alone. The changes induced by partial unfolding clearly give better film-penetration ability, as well as disruption of liquid crystalline domains in the film, thereby inducing film miscibility. Gold or protein only does not possess the nanoscale film-affecting properties of the protein-gold constructs, and as such the surface-active and miscibility-affecting characteristics of the BSA-Aunp represent emergent qualities.
Collapse
Affiliation(s)
- Sina M Lystvet
- Ugelstad Laboratory, Department of Chemical Engineering, Norwegian University of Science and Technology (NTNU), N-7491, Trondheim, Norway.
| | | | | | | | | |
Collapse
|
41
|
Tetrakis(4-sulfonatophenyl)porphyrin fluorescence as reporter of human serum albumin structural changes induced by guanidine hydrochloride. J Photochem Photobiol A Chem 2011. [DOI: 10.1016/j.jphotochem.2010.09.028] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
|