1
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Abstract
Luminogens with aggregation-induced emission (AIEgens) properties have numerous broad applications in fields of chemical and biological analyses due to their exceptional photostability, excellent signal reliability, high quantum yield, and large Stokes' shift. In particular, AIEgens also bring new blood for immunoassay. Since publication of the first 2004 paper, AIEgens-based immunoassays have received significant attention because of their high sensitivity, specificity, accuracy, and reliability. However, until now, there have been no comprehensive literature reviews focused on the evolving field of AIEgens-based immunoassays. Thus, we have extensively reviewed AIEgens-based immunoassays from their basic working principles to specific applications. We focus on several fundamental elements of AIEgens-based immunoassays, including the typical structures of AIEgens, emission mechanism of AIEgens probes, function of AIEgens in immunoassays, and platform of AIEgens-based immunoassays. Then, the representative applications of AIEgens-based immunoassays in food safety, medical diagnostics, and environmental monitoring are explored. Thus, proposals on how to further improve the AIEgens-based immunoassay performance are also discussed, as well as future challenges and perspectives, aiming to provide brief and valid guidelines for choosing suitable AIEgens-based immunoassays according to specific application requirements.
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Affiliation(s)
- Leina Dou
- Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety and Beijing Laboratory for Food Quality and Safety, College of Veterinary Medicine, China Agricultural University, Beijing 100193, People's Republic of China
| | - Qing Li
- Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety and Beijing Laboratory for Food Quality and Safety, College of Veterinary Medicine, China Agricultural University, Beijing 100193, People's Republic of China
| | - Zhanhui Wang
- Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety and Beijing Laboratory for Food Quality and Safety, College of Veterinary Medicine, China Agricultural University, Beijing 100193, People's Republic of China
| | - Jianzhong Shen
- Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety and Beijing Laboratory for Food Quality and Safety, College of Veterinary Medicine, China Agricultural University, Beijing 100193, People's Republic of China
| | - Wenbo Yu
- Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety and Beijing Laboratory for Food Quality and Safety, College of Veterinary Medicine, China Agricultural University, Beijing 100193, People's Republic of China
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2
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Gruba N, Rachubik P, Piwkowska A, Lesner A. Analysis of urinary kallikrein-related peptidase 13 for monitoring bladder cancer. Biomarkers 2021; 26:770-779. [PMID: 34704886 DOI: 10.1080/1354750x.2021.1999502] [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] [Indexed: 10/20/2022]
Abstract
BACKGROUND Bladder cancer (BC) is one of the 10 most common types of cancer worldwide, with approximately 550,000 new cases each year. Early detection and appropriate diagnosis are important factors in successful treatment of the disease. MATERIAL AND METHODS We used specific fluorogenic substrate for the quantitative determination of urine kallikrein 13 (KLK13) activity in healthy (n = 15) and BC (n = 54) patients. The proteolytic activity in individual urine samples was determined by fluorescence measurements. Then, immunoenzymatic analyses (ELISA, Western blot) were performed to confirm the presence of KLK13 in the tested samples. RESULTS Urine samples from patients with G2 and G3 grade BC contained proteolytically active KLK13, as confirmed by kinetic analysis and immunochemical detection. KLK13 was not detected in the urine of patients with G1 grade BC. DISCUSSION Previous clinical study reveals the KLK13 significance for BC prognosis as increased KLK13 expression was highlighted in bladder tumours compared to normal adjacent tissues. Our findings correlate to the report. KLK13 activity was confirmed in BC patients with G2 and G3 stage of disease development. CONCLUSIONS Using specific chromogenic/fluorogenic peptides could be useful for the non-invasive disease monitoring of BC progress.
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Affiliation(s)
- Natalia Gruba
- Department of Environmental Technology, Faculty of Chemistry, University of Gdańsk, Gdańsk, Poland
| | - Patrycja Rachubik
- Laboratory of Molecular and Cellular Nephrology, Mossakowski Medical Research Institute, Polish Academy of Sciences, Gdańsk, Poland
| | - Agnieszka Piwkowska
- Laboratory of Molecular and Cellular Nephrology, Mossakowski Medical Research Institute, Polish Academy of Sciences, Gdańsk, Poland.,Department of Molecular Biotechnology, Faculty of Chemistry, University of Gdańsk, Gdańsk, Poland
| | - Adam Lesner
- Department of Environmental Technology, Faculty of Chemistry, University of Gdańsk, Gdańsk, Poland
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3
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Breidenbach J, Lemke C, Pillaiyar T, Schäkel L, Al Hamwi G, Diett M, Gedschold R, Geiger N, Lopez V, Mirza S, Namasivayam V, Schiedel AC, Sylvester K, Thimm D, Vielmuth C, Phuong Vu L, Zyulina M, Bodem J, Gütschow M, Müller CE. Targeting the Main Protease of SARS-CoV-2: From the Establishment of High Throughput Screening to the Design of Tailored Inhibitors. Angew Chem Int Ed Engl 2021; 60:10423-10429. [PMID: 33655614 PMCID: PMC8014119 DOI: 10.1002/anie.202016961] [Citation(s) in RCA: 75] [Impact Index Per Article: 25.0] [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: 12/21/2020] [Revised: 02/08/2021] [Indexed: 12/11/2022]
Abstract
The main protease of SARS‐CoV‐2 (Mpro), the causative agent of COVID‐19, constitutes a significant drug target. A new fluorogenic substrate was kinetically compared to an internally quenched fluorescent peptide and shown to be ideally suitable for high throughput screening with recombinantly expressed Mpro. Two classes of protease inhibitors, azanitriles and pyridyl esters, were identified, optimized and subjected to in‐depth biochemical characterization. Tailored peptides equipped with the unique azanitrile warhead exhibited concomitant inhibition of Mpro and cathepsin L, a protease relevant for viral cell entry. Pyridyl indole esters were analyzed by a positional scanning. Our focused approach towards Mpro inhibitors proved to be superior to virtual screening. With two irreversible inhibitors, azanitrile 8 (kinac/Ki=37 500 m−1 s−1, Ki=24.0 nm) and pyridyl ester 17 (kinac/Ki=29 100 m−1 s−1, Ki=10.0 nm), promising drug candidates for further development have been discovered.
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Affiliation(s)
- Julian Breidenbach
- Pharmaceutical Institute, Pharmaceutical & Medicinal Chemistry, University of Bonn, An der Immenburg 4, 53121, Bonn, Germany), E-mails
| | - Carina Lemke
- Pharmaceutical Institute, Pharmaceutical & Medicinal Chemistry, University of Bonn, An der Immenburg 4, 53121, Bonn, Germany), E-mails
| | - Thanigaimalai Pillaiyar
- Pharmaceutical Institute, Pharmaceutical & Medicinal Chemistry, University of Bonn, An der Immenburg 4, 53121, Bonn, Germany), E-mails.,Present address: Pharmaceutical Institute, Pharmaceutical Chemistry, Eberhard-Karls-University Tübingen, Auf der Morgenstelle 8, 72076, Tübingen, Germany
| | - Laura Schäkel
- Pharmaceutical Institute, Pharmaceutical & Medicinal Chemistry, University of Bonn, An der Immenburg 4, 53121, Bonn, Germany), E-mails
| | - Ghazl Al Hamwi
- Pharmaceutical Institute, Pharmaceutical & Medicinal Chemistry, University of Bonn, An der Immenburg 4, 53121, Bonn, Germany), E-mails
| | - Miriam Diett
- Pharmaceutical Institute, Pharmaceutical & Medicinal Chemistry, University of Bonn, An der Immenburg 4, 53121, Bonn, Germany), E-mails
| | - Robin Gedschold
- Pharmaceutical Institute, Pharmaceutical & Medicinal Chemistry, University of Bonn, An der Immenburg 4, 53121, Bonn, Germany), E-mails
| | - Nina Geiger
- Institute for Virology and Immunobiology, Julius-Maximilians-University Würzburg, Versbacher Strasse 7, 97078, Würzburg, Germany
| | - Vittoria Lopez
- Pharmaceutical Institute, Pharmaceutical & Medicinal Chemistry, University of Bonn, An der Immenburg 4, 53121, Bonn, Germany), E-mails
| | - Salahuddin Mirza
- Pharmaceutical Institute, Pharmaceutical & Medicinal Chemistry, University of Bonn, An der Immenburg 4, 53121, Bonn, Germany), E-mails
| | - Vigneshwaran Namasivayam
- Pharmaceutical Institute, Pharmaceutical & Medicinal Chemistry, University of Bonn, An der Immenburg 4, 53121, Bonn, Germany), E-mails
| | - Anke C Schiedel
- Pharmaceutical Institute, Pharmaceutical & Medicinal Chemistry, University of Bonn, An der Immenburg 4, 53121, Bonn, Germany), E-mails
| | - Katharina Sylvester
- Pharmaceutical Institute, Pharmaceutical & Medicinal Chemistry, University of Bonn, An der Immenburg 4, 53121, Bonn, Germany), E-mails
| | - Dominik Thimm
- Pharmaceutical Institute, Pharmaceutical & Medicinal Chemistry, University of Bonn, An der Immenburg 4, 53121, Bonn, Germany), E-mails
| | - Christin Vielmuth
- Pharmaceutical Institute, Pharmaceutical & Medicinal Chemistry, University of Bonn, An der Immenburg 4, 53121, Bonn, Germany), E-mails
| | - Lan Phuong Vu
- Pharmaceutical Institute, Pharmaceutical & Medicinal Chemistry, University of Bonn, An der Immenburg 4, 53121, Bonn, Germany), E-mails
| | - Maria Zyulina
- Pharmaceutical Institute, Pharmaceutical & Medicinal Chemistry, University of Bonn, An der Immenburg 4, 53121, Bonn, Germany), E-mails
| | - Jochen Bodem
- Institute for Virology and Immunobiology, Julius-Maximilians-University Würzburg, Versbacher Strasse 7, 97078, Würzburg, Germany
| | - Michael Gütschow
- Pharmaceutical Institute, Pharmaceutical & Medicinal Chemistry, University of Bonn, An der Immenburg 4, 53121, Bonn, Germany), E-mails
| | - Christa E Müller
- Pharmaceutical Institute, Pharmaceutical & Medicinal Chemistry, University of Bonn, An der Immenburg 4, 53121, Bonn, Germany), E-mails
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4
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Maurits E, Degeling CG, Kisselev AF, Florea BI, Overkleeft HS. Structure-Based Design of Fluorogenic Substrates Selective for Human Proteasome Subunits. Chembiochem 2020; 21:3220-3224. [PMID: 32598532 PMCID: PMC7754458 DOI: 10.1002/cbic.202000375] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 06/29/2020] [Indexed: 11/07/2022]
Abstract
Proteasomes are established therapeutic targets for hematological cancers and promising targets for autoimmune diseases. In the past, we have designed and synthesized mechanism-based proteasome inhibitors that are selective for the individual catalytic activities of human constitutive proteasomes and immunoproteasomes: β1c, β1i, β2c, β2i, β5c and β5i. We show here that by taking the oligopeptide recognition element and substituting the electrophile for a fluorogenic leaving group, fluorogenic substrates are obtained that report on the proteasome catalytic activity also targeted by the parent inhibitor. Though not generally applicable (β5c and β2i substrates showing low activity), effective fluorogenic substrates reporting on the individual activity of β1c, β1i, β2c and β5i subunits in Raji (human B cell) lysates and purified 20S proteasome were identified in this manner. Our work thus adds to the expanding proteasome research toolbox through the identification of new and/or more effective subunit-selective fluorogenic substrates.
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Affiliation(s)
- Elmer Maurits
- Leiden Institute of ChemistryLeiden UniversityEinsteinweg 552333 CCLeidenThe Netherlands
| | - Christian G. Degeling
- Leiden Institute of ChemistryLeiden UniversityEinsteinweg 552333 CCLeidenThe Netherlands
| | - Alexei F. Kisselev
- Department of Drug Discovery and DevelopmentHarrison School of PharmacyAuburn UniversityAuburnAL 36849USA
| | - Bogdan I. Florea
- Leiden Institute of ChemistryLeiden UniversityEinsteinweg 552333 CCLeidenThe Netherlands
| | - Herman S. Overkleeft
- Leiden Institute of ChemistryLeiden UniversityEinsteinweg 552333 CCLeidenThe Netherlands
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5
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Abstract
The ability to detect, identify and quantify bacteria is crucial in clinical diagnostics, environmental testing, food security settings and in microbiology research. Recently, the threat of multidrug-resistant bacterial pathogens pushed the global scientific community to develop fast, reliable, specific and affordable methods to detect bacterial species. The use of synthetically modified enzyme substrates is a convenient approach to detect bacteria in a specific, economic and rapid manner. The method is based on the use of specific enzyme substrates for a given bacterial marker enzyme, conjugated to a signalogenic moiety. Following enzymatic reaction, the signalophor is released from the synthetic substrate, generating a specific and measurable signal. Several types of signalophors have been described and are defined by the type of signal they generate, such as chromogenic, fluorogenic, luminogenic, electrogenic and redox. Signalophors are further subdivided into groups based on their solubility in water, which is key in defining their application on solid or liquid media for bacterial culturing. This comprehensive review describes synthetic enzyme substrates and their applications for bacterial detection, showing their mechanism of action and their synthetic routes.
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Affiliation(s)
| | | | - Urs Spitz
- Biosynth Carbosynth, Axis House, High Street, Compton, Berkshire RG20 6NL, UK; (L.P.); (T.S.)
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6
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Dangi B, Davydova NY, Vavilov NE, Zgoda VG, Davydov DR. Nonadditivity in human microsomal drug metabolism revealed in a study with coumarin 152, a polyspecific cytochrome P450 substrate. Xenobiotica 2020; 50:1393-1405. [PMID: 32662751 DOI: 10.1080/00498254.2020.1775913] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
We closely characterized 7-Dimethylamino-4-trifluromethylcoumarin (Coumarin 152, C152), a substrate metabolized by multiple P450 species, to establish a new fluorogenic probe for the studies of functional integration in the cytochrome P450 ensemble. Scanning fluorescence spectroscopy and LC/MS-MS were used to characterize the products of N-demethylation of C152 and optimize their fluorometric detection. The metabolism of C152 by the individual P450 species was characterized using the microsomes containing cDNA-expressed enzymes. C152 metabolism in human liver microsomes (HLM) was studied in a preparation with quantified content of eleven P450 species. C152 is metabolized by CYP2B6, CYP3A4, CYP3A5, CYP2C19, CYP1A2, CYP2C9, and CYP2C8 listed in the order of decreasing turnover. The affinities exhibited by CYP3A5, CYP2C9, and CYP2C8 were lower than those characteristic to the other enzymes. The presumption of additivity suggests the participation of CYP3A4, CYP2B6, and CYP2C19 to be 84, 8, and 0.2%, respectively. Contrary to this prediction, inhibitory analysis identified CYP2C19 as the principal C152-metabolizing enzyme. We thoroughly characterize C152 for the studies of drug metabolism in HLM and demonstrate the limitations of the proportional projection approach by providing an example, where the involvement of individual P450 species cannot be predicted from their content.
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Affiliation(s)
- Bikash Dangi
- Department of Chemistry, Washington State University, Pullman, WA, USA
| | | | | | - Victor G Zgoda
- Institute of Biomedical Chemistry, Moscow, Russia.,Skolkovo Institute of Science and Technology, Skolkovo, Moscow region, Russia
| | - Dmitri R Davydov
- Department of Chemistry, Washington State University, Pullman, WA, USA
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7
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Wysocka M, Romanowska A, Gruba N, Michalska M, Giełdoń A, Lesner A. A Peptidomimetic Fluorescent Probe to Detect the Trypsin β2 Subunit of the Human 20S Proteasome. Int J Mol Sci 2020; 21:ijms21072396. [PMID: 32244300 PMCID: PMC7177456 DOI: 10.3390/ijms21072396] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 03/25/2020] [Accepted: 03/29/2020] [Indexed: 01/20/2023] Open
Abstract
This work describes the chemical synthesis, combinatorial selection, and enzymatic evaluation of peptidomimetic fluorescent substrates specific for the trypsin-like (β2) subunit of the 20S human proteasome. After deconvolution of a library comprising nearly 6000 compounds composed of peg substituted diaminopropionic acid DAPEG building blocks, the sequence ABZ–Dap(O2(Cbz))–Dap(GO1)–Dap(O2(Cbz))–Arg–ANB–NH2, where ABZ is 2-aminobenzoic acid, and ANB- 5 amino 2- nitro benzoic acid was selected. Its cleavage followed sigmoidal kinetics, characteristic for allosteric enzymes, with Km = 3.22 ± 0.02 μM, kcat = 245 s−1, and kcat/Km = 7.61 × 107 M−1 s−1. This process was practically halted when a selective inhibitor of the β2 subunit of the 20S human proteasome was supplemented to the reaction system. Titration of the substrate resulting in decreased amounts of proteasome 20S produced a linear signal up to 10−11 M. Using this substrate, we detected human proteasome 20S in human urine samples taken from the bladders of cancer patients. This observation could be useful for the noninvasive diagnosis of this severe disease.
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Affiliation(s)
| | | | | | | | | | - Adam Lesner
- Correspondence: ; Tel.: +48-585-235-095; Fax: +48-585-235-472
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8
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Gitlin-Domagalska A, Mangold M, Dębowski D, Ptaszyńska N, Łęgowska A, Gütschow M, Rolka K. Matriptase-2: monitoring and inhibiting its proteolytic activity. Future Med Chem 2018. [PMID: 30518272 DOI: 10.4155/fmc-2018-0346] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Matriptase-2 (MT2) is a membrane-anchored proteolytic enzyme. It acts as the proteolytic key regulator in human iron homeostasis. A high expression level can lead to iron overload diseases, whereas mutations in the gene encoding MT2, TMPRSS6, may result in various forms of iron deficiency anemia. Recently, MT2 has been reported as a positive prognostic factor in breast and prostate cancers. However, the exact functions of MT2 in various pathophysiological conditions are still not fully understood. In this review, we describe the synthetic tools designed and synthesized to regulate or monitor MT2 proteolytic activity and present the latest knowledge about the role of MT2 in iron homeostasis and cancer.
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9
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White A, Koelper A, Russell A, Larsen EM, Kim C, Lavis LD, Hoops GC, Johnson RJ. Fluorogenic structure activity library pinpoints molecular variations in substrate specificity of structurally homologous esterases. J Biol Chem 2018; 293:13851-13862. [PMID: 30006352 DOI: 10.1074/jbc.ra118.003972] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [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: 05/14/2018] [Revised: 07/11/2018] [Indexed: 01/08/2023] Open
Abstract
Cellular esterases catalyze many essential biological functions by performing hydrolysis reactions on diverse substrates. The promiscuity of esterases complicates assignment of their substrate preferences and biological functions. To identify universal factors controlling esterase substrate recognition, we designed a 32-member structure-activity relationship (SAR) library of fluorogenic ester substrates and used this library to systematically interrogate esterase preference for chain length, branching patterns, and polarity to differentiate common classes of esterase substrates. Two structurally homologous bacterial esterases were screened against this library, refining their previously broad overlapping substrate specificity. Vibrio cholerae esterase ybfF displayed a preference for γ-position thioethers and ethers, whereas Rv0045c from Mycobacterium tuberculosis displayed a preference for branched substrates with and without thioethers. We determined that this substrate differentiation was partially controlled by individual substrate selectivity residues Tyr-119 in ybfF and His-187 in Rv0045c; reciprocal substitution of these residues shifted each esterase's substrate preference. This work demonstrates that the selectivity of esterases is tuned based on transition state stabilization, identifies thioethers as an underutilized functional group for esterase substrates, and provides a rapid method for differentiating structural isozymes. This SAR library could have multifaceted future applications, including in vivo imaging, biocatalyst screening, molecular fingerprinting, and inhibitor design.
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Affiliation(s)
- Alex White
- From the Department of Chemistry and Biochemistry, Butler University, Indianapolis, Indiana 46208-3443 and
| | - Andrew Koelper
- From the Department of Chemistry and Biochemistry, Butler University, Indianapolis, Indiana 46208-3443 and
| | - Arielle Russell
- From the Department of Chemistry and Biochemistry, Butler University, Indianapolis, Indiana 46208-3443 and
| | - Erik M Larsen
- From the Department of Chemistry and Biochemistry, Butler University, Indianapolis, Indiana 46208-3443 and
| | - Charles Kim
- the Howard Hughes Medical Institute, Janelia Research Campus, Ashburn, Virginia 20147-2439
| | - Luke D Lavis
- the Howard Hughes Medical Institute, Janelia Research Campus, Ashburn, Virginia 20147-2439
| | - Geoffrey C Hoops
- From the Department of Chemistry and Biochemistry, Butler University, Indianapolis, Indiana 46208-3443 and
| | - R Jeremy Johnson
- From the Department of Chemistry and Biochemistry, Butler University, Indianapolis, Indiana 46208-3443 and
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10
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Bassett B, Waibel B, White A, Hansen H, Stephens D, Koelper A, Larsen EM, Kim C, Glanzer A, Lavis LD, Hoops GC, Johnson RJ. Measuring the Global Substrate Specificity of Mycobacterial Serine Hydrolases Using a Library of Fluorogenic Ester Substrates. ACS Infect Dis 2018; 4:904-911. [PMID: 29648787 PMCID: PMC5993602 DOI: 10.1021/acsinfecdis.7b00263] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [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] [Indexed: 01/08/2023]
Abstract
Among the proteins required for lipid metabolism in Mycobacterium tuberculosis are a significant number of uncharacterized serine hydrolases, especially lipases and esterases. Using a streamlined synthetic method, a library of immolative fluorogenic ester substrates was expanded to better represent the natural lipidomic diversity of Mycobacterium. This expanded fluorogenic library was then used to rapidly characterize the global structure activity relationship (SAR) of mycobacterial serine hydrolases in M. smegmatis under different growth conditions. Confirmation of fluorogenic substrate activation by mycobacterial serine hydrolases was performed using nonspecific serine hydrolase inhibitors and reinforced the biological significance of the SAR. The hydrolases responsible for the global SAR were then assigned using gel-resolved activity measurements, and these assignments were used to rapidly identify the relative substrate specificity of previously uncharacterized mycobacterial hydrolases. These measurements provide a global SAR of mycobacterial hydrolase activity, a picture of cycling hydrolase activity, and a detailed substrate specificity profile for previously uncharacterized hydrolases.
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Affiliation(s)
- Braden Bassett
- Department of Chemistry and Biochemistry, Butler University, 4600 Sunset Ave., Indianapolis, IN 46208-3443 (USA)
| | - Brent Waibel
- Department of Chemistry and Biochemistry, Butler University, 4600 Sunset Ave., Indianapolis, IN 46208-3443 (USA)
| | - Alex White
- Department of Chemistry and Biochemistry, Butler University, 4600 Sunset Ave., Indianapolis, IN 46208-3443 (USA)
| | - Heather Hansen
- Department of Chemistry and Biochemistry, Butler University, 4600 Sunset Ave., Indianapolis, IN 46208-3443 (USA)
| | - Dominique Stephens
- Department of Chemistry and Biochemistry, Butler University, 4600 Sunset Ave., Indianapolis, IN 46208-3443 (USA)
| | - Andrew Koelper
- Department of Chemistry and Biochemistry, Butler University, 4600 Sunset Ave., Indianapolis, IN 46208-3443 (USA)
| | - Erik M. Larsen
- Department of Chemistry and Biochemistry, Butler University, 4600 Sunset Ave., Indianapolis, IN 46208-3443 (USA)
| | - Charles Kim
- Howard Hughes Medical Institute, Janelia Research Campus, 19700 Helix Dr., Ashburn, VA 20147-2439 (USA)
| | - Adam Glanzer
- Department of Chemistry and Biochemistry, Butler University, 4600 Sunset Ave., Indianapolis, IN 46208-3443 (USA)
| | - Luke D. Lavis
- Howard Hughes Medical Institute, Janelia Research Campus, 19700 Helix Dr., Ashburn, VA 20147-2439 (USA)
| | - Geoffrey C. Hoops
- Department of Chemistry and Biochemistry, Butler University, 4600 Sunset Ave., Indianapolis, IN 46208-3443 (USA)
| | - R. Jeremy Johnson
- Department of Chemistry and Biochemistry, Butler University, 4600 Sunset Ave., Indianapolis, IN 46208-3443 (USA)
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11
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Wei X, Ma Y, Wu Q, Zhang J, Cai Z, Lu M. An Improved Helferich Method for the α/β-Stereoselective Synthesis of 4-Methylumbelliferyl Glycosides for the Detection of Microorganisms. Molecules 2015; 20:21681-99. [PMID: 26690097 PMCID: PMC6331929 DOI: 10.3390/molecules201219789] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Revised: 11/26/2015] [Accepted: 11/26/2015] [Indexed: 12/22/2022] Open
Abstract
An improved Helferich method is presented. It involves the glycosylation of 4-methyl-umbelliferone with glycosyl acetates in the presence of boron trifluoride etherate combined with triethylamine, pyridine, or 4-dimethylaminopyridine under mild conditions, followed by deprotection to give fluorogenic 4-methylumbelliferyl glycoside substrates. Due to the use of base, the glycosylation reaction proceeds more easily, is uncommonly α- or β-stereoselective, and affords the corresponding products in moderate to excellent yields (51%-94%) under appropriate conditions.
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Affiliation(s)
- Xianhu Wei
- Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou 510650, China.
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangzhou 510070, China.
- Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangzhou 510070, China.
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, Guangzhou 510070, China.
- University of Chinese Academy of Sciences, Beijing 100039, China.
| | - Yanxia Ma
- Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou 510650, China.
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangzhou 510070, China.
- Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangzhou 510070, China.
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, Guangzhou 510070, China.
- University of Chinese Academy of Sciences, Beijing 100039, China.
| | - Qingping Wu
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangzhou 510070, China.
- Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangzhou 510070, China.
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, Guangzhou 510070, China.
| | - Jumei Zhang
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangzhou 510070, China.
- Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangzhou 510070, China.
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, Guangzhou 510070, China.
| | - Zhihe Cai
- Guangdong Huankai Microbial Sci. & Tech. Co., Ltd., Guangzhou 510663, China.
| | - Mianfei Lu
- Guangdong Huankai Microbial Sci. & Tech. Co., Ltd., Guangzhou 510663, China.
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12
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Cárdenas-Maestre JM, Pérez-López AM, Bradley M, Sánchez-Martín RM. Microsphere-based intracellular sensing of caspase-3/7 in apoptotic living cells. Macromol Biosci 2014; 14:923-8. [PMID: 24664851 DOI: 10.1002/mabi.201300525] [Citation(s) in RCA: 10] [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: 11/25/2013] [Revised: 01/30/2014] [Indexed: 11/10/2022]
Abstract
A novel multifunctional probe to monitor intracellular enzymatic activity in living cells is successfully developed. Their use as accurate intracellular sensors by conjugation of an internal control (that gives an extra feature to both evaluate cellular-uptake efficiency and track probes over time) is reported. In particular, a specific application of these multifunctional microspheres as sensors of caspase-3/7 to monitor apoptosis by flow cytometry is described. The preparation of these devices together with a kinetic study towards caspase-3 and caspase-7 and their evaluation as flow cytometry probe in apoptotic living cells are reported.
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13
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Abstract
The dynamic addition of O-GlcNAc to target proteins is now recognized as a major signaling paradigm impacting phosphorylation, protein turnover, gene expression, and other posttranslational modifications influencing epigenetics. Here we describe the production of and methods for assay of the recombinant enzymes of O-GlcNAc cycling: O-linked GlcNAc Transferase (OGT) and O-GlcNAcase (OGA).
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Affiliation(s)
- Eun Ju Kim
- Laboratory Cell Biochemistry and Biology, NIDDK, National Institutes of Health, Bethesda, MD, USA
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Sun X, Zhang A, Baker B, Sun L, Howard A, Buswell J, Maurel D, Masharina A, Johnsson K, Noren CJ, Xu MQ, Corrêa IR. Development of SNAP-tag fluorogenic probes for wash-free fluorescence imaging. Chembiochem 2011; 12:2217-26. [PMID: 21793150 PMCID: PMC3213346 DOI: 10.1002/cbic.201100173] [Citation(s) in RCA: 206] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2011] [Indexed: 12/22/2022]
Abstract
The ability to specifically attach chemical probes to individual proteins represents a powerful approach to the study and manipulation of protein function in living cells. It provides a simple, robust and versatile approach to the imaging of fusion proteins in a wide range of experimental settings. However, a potential drawback of detection using chemical probes is the fluorescence background from unreacted or nonspecifically bound probes. In this report we present the design and application of novel fluorogenic probes for labeling SNAP-tag fusion proteins in living cells. SNAP-tag is an engineered variant of the human repair protein O(6)-alkylguanine-DNA alkyltransferase (hAGT) that covalently reacts with benzylguanine derivatives. Reporter groups attached to the benzyl moiety become covalently attached to the SNAP tag while the guanine acts as a leaving group. Incorporation of a quencher on the guanine group ensures that the benzylguanine probe becomes highly fluorescent only upon labeling of the SNAP-tag protein. We describe the use of intramolecularly quenched probes for wash-free labeling of cell surface-localized epidermal growth factor receptor (EGFR) fused to SNAP-tag and for direct quantification of SNAP-tagged β-tubulin in cell lysates. In addition, we have characterized a fast-labeling variant of SNAP-tag, termed SNAP(f), which displays up to a tenfold increase in its reactivity towards benzylguanine substrates. The presented data demonstrate that the combination of SNAP(f) and the fluorogenic substrates greatly reduces the background fluorescence for labeling and imaging applications. This approach enables highly sensitive spatiotemporal investigation of protein dynamics in living cells.
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Affiliation(s)
- Xiaoli Sun
- New England Biolabs, Inc240 County Road, Ipswich, MA 01938 (USA)
| | - Aihua Zhang
- New England Biolabs, Inc240 County Road, Ipswich, MA 01938 (USA)
| | - Brenda Baker
- New England Biolabs, Inc240 County Road, Ipswich, MA 01938 (USA)
| | - Luo Sun
- New England Biolabs, Inc240 County Road, Ipswich, MA 01938 (USA)
| | - Angela Howard
- New England Biolabs, Inc240 County Road, Ipswich, MA 01938 (USA)
| | - John Buswell
- New England Biolabs, Inc240 County Road, Ipswich, MA 01938 (USA)
| | - Damien Maurel
- Institute of Chemical Sciences and Engineering, Ecole Polytechnique Federal de Lausanne (EPFL)1015 Lausanne (Switzerland)
| | - Anastasiya Masharina
- Institute of Chemical Sciences and Engineering, Ecole Polytechnique Federal de Lausanne (EPFL)1015 Lausanne (Switzerland)
| | - Kai Johnsson
- Institute of Chemical Sciences and Engineering, Ecole Polytechnique Federal de Lausanne (EPFL)1015 Lausanne (Switzerland)
| | | | - Ming-Qun Xu
- New England Biolabs, Inc240 County Road, Ipswich, MA 01938 (USA)
| | - Ivan R Corrêa
- New England Biolabs, Inc240 County Road, Ipswich, MA 01938 (USA)
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Abstract
A method is presented for detection of lysosomal hydrolase activity in situ in colonies of Chinese hamster ovary cells. This method was used to screen for mutants deficient in lysosomal alpha-mannosidase. Mutagenized cells were replicated onto filter papers [Esko, J. D. & Raetz, C. R. H. (1978) Proc. Natl. Acad. Sci. USA 75, 1190-1193] and allowed to divide for 11-14 days; cells on the filter replicas were lysed, and the filters were incubated with 4-methylumbelliferyl-alpha-D-mannopyranoside at pH 4.4 and then photographed under UV light. Colonies for which the replicas exhibited little or no fluorescence were picked from the master plates and purified; mutants with decreased alpha-mannosidase activity were obtained at a frequency of 1 per 1500 mutagenized cells. Analysis of one of these mutants showed that lysosomal alpha-mannosidase activity was 18% of that from wild-type cells, whereas the activities of alpha-mannosidases not of lysosomal origin were similar in the wild type and mutant (these included both Golgi-associated and cytosolic enzymes as well as a novel acid alpha-mannosidase seen only in cells from confluent culture). The mutant contained normal levels of other lysosomal hydrolases. Both wild-type and mutant cells secreted alpha-mannosidase into the medium at levels proportional to those found inside the cells. Incubation of mutant cells with secretions from the wild type resulted in partial restoration of enzyme activity. Added enzyme was localized in the lysosomal fractions; uptake of added enzyme was inhibited by mannose 6-phosphate and fructose 1-phosphate, which are known to inhibit uptake of lysosomal enzymes into human diploid fibroblasts.
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