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Millán-Pacheco C, Serratos IN, del Rosario Sánchez González S, Galano A. Newly designed melatonin analogues with potential neuroprotective effects. Theor Chem Acc 2022. [DOI: 10.1007/s00214-022-02907-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Guo H, Yang Y, Zhang Q, Deng JR, Yang Y, Li S, So PK, Lam TC, Wong MK, Zhao Q. Integrated Mass Spectrometry Reveals Celastrol As a Novel Catechol-O-methyltransferase Inhibitor. ACS Chem Biol 2022; 17:2003-2009. [PMID: 35302751 DOI: 10.1021/acschembio.2c00011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Natural product celastrol is known to have various biological activities, yet its molecular targets that correspond to many activities remain unclear. Here, we used multiple mass-spectrometry-based approaches to identify catechol-O-methyltransferase (COMT) as a major binding target of celastrol and characterized their interaction comprehensively. Celastrol was found to inhibit the enzymatic activity of COMT and increased the dopamine level in neuroendocrine chromaffin cells significantly. Our study not only revealed a novel binding target of celastrol but also provided a new scaffold and cysteine hot spot for developing new generation COMT inhibitors in combating neurological disorders.
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Affiliation(s)
- Haijun Guo
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, SAR 999077, China
| | - Yang Yang
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, SAR 999077, China
| | - Qi Zhang
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, SAR 999077, China
- Centre for Eye and Vision Research, 17W Hong Kong Science Park, Hong Kong, SAR 999077, China
| | - Jie-Ren Deng
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, SAR 999077, China
| | - Ying Yang
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, SAR 999077, China
| | - Shuqi Li
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, SAR 999077, China
| | - Pui-Kin So
- University Research Facility in Life Sciences, The Hong Kong Polytechnic University, Hong Kong, SAR 999077, China
| | - Thomas C. Lam
- Centre for Eye and Vision Research, 17W Hong Kong Science Park, Hong Kong, SAR 999077, China
- Centre for Myopia Research, School of Optometry, The Hong Kong Polytechnic University, Hong Kong, SAR 999077, China
- Research Centre for SHARP Vision, The Hong Kong Polytechnic University, Hong Kong, SAR 999077, China
| | - Man-kin Wong
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, SAR 999077, China
| | - Qian Zhao
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, SAR 999077, China
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Rutherford K, Daggett V. A hotspot of inactivation: The A22S and V108M polymorphisms individually destabilize the active site structure of catechol O-methyltransferase. Biochemistry 2009; 48:6450-60. [PMID: 19435324 DOI: 10.1021/bi900174v] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Human catechol O-methyltransferase (COMT) contains three common polymorphisms (A22S, A52T, and V108M), two of which (A22S and V108M) render the protein susceptible to deactivation by temperature or oxidation. We have performed multiple molecular dynamics simulations of the wild-type, A22S, A52T, and V108M COMT proteins to explore the structural consequences of these mutations. In total, we have amassed more than 1.4 micros of simulation time, representing the largest set of simulations detailing the effects of polymorphisms on a protein system to date. The A52T mutation had no significant effect on COMT structure in accord with experiment, thereby serving as a good negative control for the simulation set. Residues 22 (alpha2) and 108 (alpha5) interact with each other throughout the simulations and are located in a polymorphic hotspot approximately 20 A from the active site. Introduction of either the larger Ser (22) or Met (108) tightens this interaction, pulling alpha2 and alpha5 toward each other and away from the protein core. The V108M polymorphism rearranges active-site residues in alpha5, beta3, and alpha6, increasing the S-adenosylmethionine site solvent exposure. The A22S mutation reorients alpha2, moving critical catechol-binding residues away from the substrate-binding pocket. The A22S and V108M polymorphisms evolved independently in Northern European and Asian populations. While the decreased activities of both A22S and V108M COMT are associated with an increased risk for schizophrenia, the V108M-induced destabilization is also linked with improved cognitive function. These results suggest that polymorphisms within this hotspot may have evolved to regulate COMT activity and that heterozygosity for either mutation may be advantageous.
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Affiliation(s)
- Karen Rutherford
- Department of Biochemistry, University of Washington, Seattle, Washington 98195-5013, USA
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Rutherford K, Alphandéry E, McMillan A, Daggett V, Parson W. The V108M mutation decreases the structural stability of catechol O-methyltransferase. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2008; 1784:1098-105. [DOI: 10.1016/j.bbapap.2008.04.006] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2008] [Revised: 04/01/2008] [Accepted: 04/03/2008] [Indexed: 12/31/2022]
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Rutherford K, Le Trong I, Stenkamp R, Parson W. Crystal Structures of Human 108V and 108M Catechol O-Methyltransferase. J Mol Biol 2008; 380:120-30. [DOI: 10.1016/j.jmb.2008.04.040] [Citation(s) in RCA: 98] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2008] [Revised: 04/14/2008] [Accepted: 04/16/2008] [Indexed: 11/29/2022]
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