1
|
Synthesis and characterization of a hybrid material (C10H28N4) [CoCl4]2 using Hirshfeld surface, vibrational and optical spectroscopy, DFT calculations and biological activities. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131804] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
2
|
Chen HW, Xia HC, Hakeim OA, Song QH. Phenothiazine and semi-cyanine based colorimetric and fluorescent probes for detection of sulfites in solutions and in living cells. RSC Adv 2021; 11:34643-34651. [PMID: 35494729 PMCID: PMC9042716 DOI: 10.1039/d1ra06868g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 10/18/2021] [Indexed: 12/21/2022] Open
Abstract
Four hemicyanine probes for selectively detecting sulfites (HSO3−/SO32−) have been constructed by the condensation reaction of 7-substituted (CN, Br, H and OH) phenothiazine aldehyde with 1-ethyl-2,3,3-trimethylindolium iodide. All four probes show a fast and sensitive response to HSO3−/SO32−via a Michael addition, with a detection limit lower than 40 nM based on monitoring their UV/vis absorption changes. Although all four probes display an increase in fluorescence when responding to HSO3−/SO32−, the increment is larger for the probe with an electron-withdrawing group than the probe with an electron-donating group, except for Br. Thus, among four probes the 7-cyano probe (PI-CN) possesses the largest fluorescent response to HSO3−/SO32−, and the lowest detection limit (7.5 nM). More expediently and easily, a film and a test paper with PI-CN have been prepared to detect HSO3−/SO32− in a sample aqueous solution selectively. Finally, the detection of HSO3−/SO32− by PI-CN in biological environments has been demonstrated by cell imaging. Four 7-substituted phenothiazine hemicyanines display a substituent effect on the fluorescence response toward sulfites. The CN-substituted probe exhibits the best sensing behavior.![]()
Collapse
Affiliation(s)
- Hong-Wei Chen
- Department of Chemistry, University of Science and Technology of China Hefei 230026 P. R. China
| | - Hong-Cheng Xia
- Department of Chemistry, University of Science and Technology of China Hefei 230026 P. R. China .,School of Pharmacy, Xinxiang Medical University Xinxiang Henan 453003 P. R. China
| | - O A Hakeim
- National Research Centre, Textile Research Division Tahrir St., Dokki Cairo Egypt
| | - Qin-Hua Song
- Department of Chemistry, University of Science and Technology of China Hefei 230026 P. R. China
| |
Collapse
|
3
|
Wang H, Zhao S, Xu Y, Li L, Li B, Pei M, Zhang G. A new fluorescent probe based on imidazole[2,1-b]benzothiazole for sensitive and selective detection of Cu2+. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2019.127384] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
|
4
|
Kalhor HR, Rezaei M. Conversion of 3,6‐O‐Dimethylfluorescein to Fluorescein‐Based Xanthylium Derivative: Characterization and Covalent Attachment to Bovine Serum Albumin. ChemistrySelect 2019. [DOI: 10.1002/slct.201902296] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Hamid Reza Kalhor
- Biochemistry Research LaboratoryChemistry Department, SharifUniversity of technology, Tehran Iran
| | - Mohsen Rezaei
- Biochemistry Research LaboratoryChemistry Department, SharifUniversity of technology, Tehran Iran
| |
Collapse
|
5
|
Wei T, Wang F, Zhang Z, Qiang J, Lv J, Chen T, Li J, Chen X. Recent Progress in the Development of Fluorometric Chemosensors to Detect Enzymatic Activity. Curr Med Chem 2019; 26:3923-3957. [DOI: 10.2174/0929867325666180214105552] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2017] [Revised: 12/10/2017] [Accepted: 12/27/2017] [Indexed: 12/16/2022]
Abstract
Enzymes are a class of macromolecules that function as highly efficient and specific
biological catalysts requiring only mild reaction conditions. Enzymes are essential to
maintaining life activities, including promoting metabolism and homeostasis, and participating
in a variety of physiological functions. Accordingly, enzymatic levels and activity are
closely related to the health of the organism, where enzymatic dysfunctions often lead to corresponding
diseases in the host. Due to this, diagnosis of certain diseases is based on the levels
and activity of certain enzymes. Therefore, rapid real-time and accurate detection of enzymes
in situ are important for diagnosis, monitoring, clinical treatment and pathological
studies of disease. Fluorescent probes have unique advantages in terms of detecting enzymes,
including being simple to use in highly sensitive and selective real-time rapid in-situ noninvasive
and highly spatial resolution visual imaging. However, fluorescent probes are most
commonly used to detect oxidoreductases, transferases and hydrolases due to the processes
and types of enzyme reactions. This paper summarizes the application of fluorescent probes to
detect these three types of enzymes over the past five years. In addition, we introduce the
mechanisms underlying detection of these enzymes by their corresponding probes.
Collapse
Affiliation(s)
- Tingwen Wei
- State Key laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing 210009, China
| | - Fang Wang
- State Key laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing 210009, China
| | - Zhijie Zhang
- State Key laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing 210009, China
| | - Jiang Qiang
- State Key laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing 210009, China
| | - Jing Lv
- State Key laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing 210009, China
| | - Tiantian Chen
- State Key laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing 210009, China
| | - Jia Li
- State Key laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing 210009, China
| | - Xiaoqiang Chen
- State Key laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing 210009, China
| |
Collapse
|
6
|
Yang L, Liu M, Sheng K, Li X, Du J, Ning Y, Wang X, Li J, Zhang Y, Wu S. Design and synthesis of a novel colorimetric fluorescent probe for the selective detection of sulfur dioxide in SH-SY5Y neuroblastoma cells and its applications in traditional Chinese medicines. NEW J CHEM 2019. [DOI: 10.1039/c8nj06326e] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A fast response time, low limit of detection and high fluorescence quantum yield probe DTCC was designed and synthesized to detect SO2 derivatives based on coumarin-thiophene dye which was fused with a coumarin moiety and 2-thiophenecarboxaldehyde.
Collapse
|
7
|
Xu J, Zheng DJ, Su MM, Chen YC, Jiao QC, Yang YS, Zhu HL. A rapid cell-permeating turn-on probe for sensitive and selective detection of sulfite in living cells. Org Biomol Chem 2018; 16:8318-8324. [DOI: 10.1039/c8ob01908h] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A rapid cell-permeating probeNJUXJ-1was introduced for sensitive and selective detection of sulfite in living cells.
Collapse
Affiliation(s)
- Jing Xu
- State Key Laboratory of Pharmaceutical Biotechnology
- School of Life Sciences
- Nanjing University
- Nanjing
- China
| | - Da-Jun Zheng
- State Key Laboratory of Pharmaceutical Biotechnology
- School of Life Sciences
- Nanjing University
- Nanjing
- China
| | - Mi-Mi Su
- State Key Laboratory of Pharmaceutical Biotechnology
- School of Life Sciences
- Nanjing University
- Nanjing
- China
| | - Yan-Chi Chen
- State Key Laboratory of Pharmaceutical Biotechnology
- School of Life Sciences
- Nanjing University
- Nanjing
- China
| | - Qing-Cai Jiao
- State Key Laboratory of Pharmaceutical Biotechnology
- School of Life Sciences
- Nanjing University
- Nanjing
- China
| | - Yu-Shun Yang
- State Key Laboratory of Pharmaceutical Biotechnology
- School of Life Sciences
- Nanjing University
- Nanjing
- China
| | - Hai-Liang Zhu
- State Key Laboratory of Pharmaceutical Biotechnology
- School of Life Sciences
- Nanjing University
- Nanjing
- China
| |
Collapse
|
8
|
Yu H, Dai G, He QR, Tang JJ. Enantioselective synthesis and evaluation of 4-styryldihydropyrimidin-2-thiones as anti-proliferative agents. Med Chem Res 2017. [DOI: 10.1007/s00044-017-1790-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
|
9
|
Paritala H, Palde PB, Carroll KS. Functional Site Discovery in a Sulfur Metabolism Enzyme by Using Directed Evolution. Chembiochem 2016; 17:1873-1878. [PMID: 27411165 DOI: 10.1002/cbic.201600264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Indexed: 11/07/2022]
Abstract
In human pathogens, the sulfate assimilation pathway provides reduced sulfur for biosynthesis of essential metabolites, including cysteine and low-molecular-weight thiol compounds. Sulfonucleotide reductases (SRs) catalyze the first committed step of sulfate reduction. In this reaction, activated sulfate in the form of adenosine-5'-phosphosulfate (APS) or 3'-phosphoadenosine 5'-phosphosulfate (PAPS) is reduced to sulfite. Gene knockout, transcriptomic and proteomic data have established the importance of SRs in oxidative stress-inducible antimicrobial resistance mechanisms. In previous work, we focused on rational and high-throughput design of small-molecule inhibitors that target the active site of SRs. However, another critical goal is to discover functionally important regions in SRs beyond the traditional active site. As an alternative to conservation analysis, we used directed evolution to rapidly identify functional sites in PAPS reductase (PAPR). Four new regions were discovered that are essential to PAPR function and lie outside the substrate binding pocket. Our results highlight the use of directed evolution as a tool to rapidly discover functionally important sites in proteins.
Collapse
Affiliation(s)
- Hanumantharao Paritala
- Department of Chemistry, The Scripps Research Institute, 130 Scripps Way, 2B2, Jupiter, FL, 33458, USA
| | - Prakash B Palde
- Department of Chemistry, The Scripps Research Institute, 130 Scripps Way, 2B2, Jupiter, FL, 33458, USA
| | - Kate S Carroll
- Department of Chemistry, The Scripps Research Institute, 130 Scripps Way, 2B2, Jupiter, FL, 33458, USA.
| |
Collapse
|
10
|
Palde PB, Bhaskar A, Pedrό Rosa LE, Madoux F, Chase P, Gupta V, Spicer T, Scampavia L, Singh A, Carroll KS. First-in-Class Inhibitors of Sulfur Metabolism with Bactericidal Activity against Non-Replicating M. tuberculosis. ACS Chem Biol 2016; 11:172-84. [PMID: 26524379 PMCID: PMC4729198 DOI: 10.1021/acschembio.5b00517] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Development of effective therapies to eradicate persistent, slowly replicating M. tuberculosis (Mtb) represents a significant challenge to controlling the global TB epidemic. To develop such therapies, it is imperative to translate information from metabolome and proteome adaptations of persistent Mtb into the drug discovery screening platforms. To this end, reductive sulfur metabolism is genetically and pharmacologically implicated in survival, pathogenesis, and redox homeostasis of persistent Mtb. Therefore, inhibitors of this pathway are expected to serve as powerful tools in its preclinical and clinical validation as a therapeutic target for eradicating persisters. Here, we establish a first functional HTS platform for identification of APS reductase (APSR) inhibitors, a critical enzyme in the assimilation of sulfate for the biosynthesis of cysteine and other essential sulfur-containing molecules. Our HTS campaign involving 38 350 compounds led to the discovery of three distinct structural classes of APSR inhibitors. A class of bioactive compounds with known pharmacology displayed potent bactericidal activity in wild-type Mtb as well as MDR and XDR clinical isolates. Top compounds showed markedly diminished potency in a conditional ΔAPSR mutant, which could be restored by complementation with Mtb APSR. Furthermore, ITC studies on representative compounds provided evidence for direct engagement of the APSR target. Finally, potent APSR inhibitors significantly decreased the cellular levels of key reduced sulfur-containing metabolites and also induced an oxidative shift in mycothiol redox potential of live Mtb, thus providing functional validation of our screening data. In summary, we have identified first-in-class inhibitors of APSR that can serve as molecular probes in unraveling the links between Mtb persistence, antibiotic tolerance, and sulfate assimilation, in addition to their potential therapeutic value.
Collapse
Affiliation(s)
- Prakash B. Palde
- Department of Chemistry, The Scripps Research Institute, Jupiter, Florida 33458, United States
| | - Ashima Bhaskar
- Department of Microbiology and Cell Biology (MCBL), Center for Infectious Disease Research (CIDR), Indian Institute of Science (IISc.), Bangalore 560012, India
| | - Laura E. Pedrό Rosa
- Lead Identification Division, The Scripps Research Institute, Jupiter, Florida 33458, United States
| | - Franck Madoux
- Lead Identification Division, The Scripps Research Institute, Jupiter, Florida 33458, United States
| | - Peter Chase
- Lead Identification Division, The Scripps Research Institute, Jupiter, Florida 33458, United States
| | - Vinayak Gupta
- Department of Chemistry, The Scripps Research Institute, Jupiter, Florida 33458, United States
| | - Timothy Spicer
- Lead Identification Division, The Scripps Research Institute, Jupiter, Florida 33458, United States
| | - Louis Scampavia
- Lead Identification Division, The Scripps Research Institute, Jupiter, Florida 33458, United States
| | - Amit Singh
- Department of Microbiology and Cell Biology (MCBL), Center for Infectious Disease Research (CIDR), Indian Institute of Science (IISc.), Bangalore 560012, India
| | - Kate S. Carroll
- Department of Chemistry, The Scripps Research Institute, Jupiter, Florida 33458, United States
| |
Collapse
|
11
|
Paritala H, Suzuki Y, Carroll KS. Design, synthesis and evaluation of Fe-S targeted adenosine 5'-phosphosulfate reductase inhibitors. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2015; 34:199-220. [PMID: 25710356 DOI: 10.1080/15257770.2014.978012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Adenosine 5'-phosphosulfate reductase (APR) is an iron-sulfur enzyme that is vital for survival of Mycobacterium tuberculosis during dormancy and is an attractive target for the treatment of latent tuberculosis (TB) infection. The 4Fe-4S cluster is coordinated to APR by sulfur atoms of four cysteine residues, is proximal to substrate, adenosine 5'-phopsphosulfate (APS), and is essential for catalytic activity. Herein, we present an approach for the development of a new class of APR inhibitors. As an initial step, we have employed an improved solid-phase chemistry method to prepare a series of N(6)-substituted adenosine analogues and their 5'-phosphates as well as adenosine 5'-phosphate diesters bearing different Fe and S binding groups, such as thiols or carboxylic and hydroxamic acid moieties. Evaluation of the resulting compounds indicates a clearly defined spacing requirement between the Fe-S targeting group and adenosine scaffold and that smaller Fe-S targeting groups are better tolerated. Molecular docking analysis suggests that the S atom of the most potent inhibitor may establish a favorable interaction with an S atom in the cluster. In summary, this study showcases an improved solid-phase method that expedites the preparation of adenosine and related 5'-phosphate derivatives and presents a unique Fe-S targeting strategy for the development of APR inhibitors.
Collapse
|
12
|
Lin VS, Chen W, Xian M, Chang CJ. Chemical probes for molecular imaging and detection of hydrogen sulfide and reactive sulfur species in biological systems. Chem Soc Rev 2015; 44:4596-4618. [PMID: 25474627 PMCID: PMC4456340 DOI: 10.1039/c4cs00298a] [Citation(s) in RCA: 705] [Impact Index Per Article: 78.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Hydrogen sulfide (H2S), a gaseous species produced by both bacteria and higher eukaryotic organisms, including mammalian vertebrates, has attracted attention in recent years for its contributions to human health and disease. H2S has been proposed as a cytoprotectant and gasotransmitter in many tissue types, including mediating vascular tone in blood vessels as well as neuromodulation in the brain. The molecular mechanisms dictating how H2S affects cellular signaling and other physiological events remain insufficiently understood. Furthermore, the involvement of H2S in metal-binding interactions and formation of related RSS such as sulfane sulfur may contribute to other distinct signaling pathways. Owing to its widespread biological roles and unique chemical properties, H2S is an appealing target for chemical biology approaches to elucidate its production, trafficking, and downstream function. In this context, reaction-based fluorescent probes offer a versatile set of screening tools to visualize H2S pools in living systems. Three main strategies used in molecular probe development for H2S detection include azide and nitro group reduction, nucleophilic attack, and CuS precipitation. Each of these approaches exploits the strong nucleophilicity and reducing potency of H2S to achieve selectivity over other biothiols. In addition, a variety of methods have been developed for the detection of other reactive sulfur species (RSS), including sulfite and bisulfite, as well as sulfane sulfur species and related modifications such as S-nitrosothiols. Access to this growing chemical toolbox of new molecular probes for H2S and related RSS sets the stage for applying these developing technologies to probe reactive sulfur biology in living systems.
Collapse
Affiliation(s)
- Vivian S Lin
- Department of Chemistry, University of California, Berkeley, California, USA
| | - Wei Chen
- Department of Chemistry, Washington State University, Pullman, Washington, USA
| | - Ming Xian
- Department of Chemistry, Washington State University, Pullman, Washington, USA
| | - Christopher J Chang
- Department of Chemistry, University of California, Berkeley, California, USA
- Department of Molecular and Cell Biology, University of California, Berkeley, California, USA
- Howard Hughes Medical Institute, University of California, Berkeley, California, USA
| |
Collapse
|
13
|
Jiao X, Liu C, Huang K, Zhang S, He S, Zhao L, Zeng X. Molecular design and synthesis of a pH independent and cell permeant fluorescent dye and its applications. Org Biomol Chem 2015; 13:6647-53. [DOI: 10.1039/c5ob00448a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel xanthene fluorescent dye with a combination of the desirable characters for fluorescent chemosensors and biomarkers including low molecular weight, water solubility, cell permeability, good biocompatibility, and strong tolerance to pH has been designed and synthesized.
Collapse
Affiliation(s)
- Xiaojie Jiao
- Tianjin Key Laboratory for Photoelectric Materials and Devices
- School of Material Science and Engineering
- Tianjin University of Technology
- Tianjin 300384
- China
| | - Chang Liu
- Tianjin Key Laboratory for Photoelectric Materials and Devices
- School of Material Science and Engineering
- Tianjin University of Technology
- Tianjin 300384
- China
| | - Kun Huang
- Tianjin Key Laboratory for Photoelectric Materials and Devices
- School of Material Science and Engineering
- Tianjin University of Technology
- Tianjin 300384
- China
| | - Siwen Zhang
- Tianjin Key Laboratory for Photoelectric Materials and Devices
- School of Material Science and Engineering
- Tianjin University of Technology
- Tianjin 300384
- China
| | - Song He
- Tianjin Key Laboratory for Photoelectric Materials and Devices
- School of Material Science and Engineering
- Tianjin University of Technology
- Tianjin 300384
- China
| | - Liancheng Zhao
- Tianjin Key Laboratory for Photoelectric Materials and Devices
- School of Material Science and Engineering
- Tianjin University of Technology
- Tianjin 300384
- China
| | - Xianshun Zeng
- Tianjin Key Laboratory for Photoelectric Materials and Devices
- School of Material Science and Engineering
- Tianjin University of Technology
- Tianjin 300384
- China
| |
Collapse
|
14
|
Xiang X, Pan G, Rong T, Zheng ZL, Leustek T. A luciferase-based method for assay of 5'-adenylylsulfate reductase. Anal Biochem 2014; 460:22-8. [PMID: 24857786 DOI: 10.1016/j.ab.2014.05.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Revised: 05/13/2014] [Accepted: 05/14/2014] [Indexed: 01/13/2023]
Abstract
A luciferase-based method was developed for measurement of 5'-adenylylsulfate (APS) reductase (APR), an enzyme of the reductive sulfate assimilation pathway in prokaryotes and plants. APR catalyzes the two-electron reduction of APS and forms sulfite and adenosine 5'-monophospahate (AMP). The luciferase-based assay measures AMP production using an enzyme-coupled system that generates luminescence. The method is shown to provide an accurate measurement of APR kinetic properties and can be used for both endpoint and continuous assays. APR activity can be measured from pure enzyme preparations as well as from crude protein extracts of tissues. In addition, the assay is ideally suited to high-throughput sample analysis of APR activity in a microtiter dish format. The method adds new capability to the study of the biochemistry and physiology of APR.
Collapse
Affiliation(s)
- Xiaoli Xiang
- Department of Plant Biology and Pathology, Rutgers University, New Brunswick, NJ 08901, USA; Institute of Maize Research, Key Laboratory of Biology and Genetic Improvement of Maize in the Southwest Region, Ministry of Agriculture, Sichuan Agricultural University, Chengdu 611130, China
| | - Guangtang Pan
- Institute of Maize Research, Key Laboratory of Biology and Genetic Improvement of Maize in the Southwest Region, Ministry of Agriculture, Sichuan Agricultural University, Chengdu 611130, China
| | - Tingzhao Rong
- Institute of Maize Research, Key Laboratory of Biology and Genetic Improvement of Maize in the Southwest Region, Ministry of Agriculture, Sichuan Agricultural University, Chengdu 611130, China
| | - Zhi-Liang Zheng
- Department of Biological Sciences, Lehman College, City University of New York, Bronx, NY 10468, USA
| | - Thomas Leustek
- Department of Plant Biology and Pathology, Rutgers University, New Brunswick, NJ 08901, USA.
| |
Collapse
|
15
|
Rodriguez AC, Kohler JJ. Recognition of diazirine-modified O-GlcNAc by human O-GlcNAcase. MEDCHEMCOMM 2014; 5:1227-1234. [PMID: 25068034 DOI: 10.1039/c4md00164h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The mammalian O-GlcNAc hydrolase (OGA) removes O-GlcNAc from serine and threonine residues on intracellular glycoproteins. OGA activity is sensitive to N-acyl substitutions to O-GlcNAc, with alkyl diazirine-modified O-GlcNAc (O-GlcNDAz) being completely resistant to removal by OGA. Using homology modeling, we identified OGA residues proximal to the N-acyl position of O-GlcNAc substrate. Mutation of one of these residues, C215, results in mutant enzymes that are able to hydrolytically remove O-GlcNDAz from a model compound. Further, the C215A mutant is capable of removing O-GlcNDAz from a peptide substrate. These results can be used to improve metabolism of O-GlcNAc analogs in cells. In addition, the enzyme specificity studies reported here provide new insight into the active site of OGA, an important drug target.
Collapse
Affiliation(s)
- Andrea C Rodriguez
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX 75390-9038
| | - Jennifer J Kohler
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX 75390-9038
| |
Collapse
|