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Perreault M, Means J, Gerson E, James M, Cotton S, Bergeron CG, Simon M, Carlin DA, Schmidt N, Moore TC, Blasbalg J, Sondheimer N, Ndugga-Kabuye K, Denney WS, Isabella VM, Lubkowicz D, Brennan A, Hava DL. The live biotherapeutic SYNB1353 decreases plasma methionine via directed degradation in animal models and healthy volunteers. Cell Host Microbe 2024; 32:382-395.e10. [PMID: 38309259 DOI: 10.1016/j.chom.2024.01.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 12/07/2023] [Accepted: 01/12/2024] [Indexed: 02/05/2024]
Abstract
Methionine is an essential proteinogenic amino acid, but its excess can lead to deleterious effects. Inborn errors of methionine metabolism resulting from loss of function in cystathionine β-synthase (CBS) cause classic homocystinuria (HCU), which is managed by a methionine-restricted diet. Synthetic biotics are gastrointestinal tract-targeted live biotherapeutics that can be engineered to replicate the benefits of dietary restriction. In this study, we assess whether SYNB1353, an E. coli Nissle 1917 derivative, impacts circulating methionine and homocysteine levels in animals and healthy volunteers. In both mice and nonhuman primates (NHPs), SYNB1353 blunts the appearance of plasma methionine and plasma homocysteine in response to an oral methionine load. A phase 1 clinical study conducted in healthy volunteers subjected to an oral methionine challenge demonstrates that SYNB1353 is well tolerated and blunts plasma methionine by 26%. Overall, SYNB1353 represents a promising approach for methionine reduction with potential utility for the treatment of HCU.
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Crystal structure of BtrK, a decarboxylase involved in the (S)-4-amino-2-hydroxybutyrate (AHBA) formation during butirosin biosynthesis. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Zheng Z, Ren S, Geng WC, Cui X, Wu B, Wang H. Monitoring Methionine Decarboxylase by Supramolecular Tandem Assay. Chem Asian J 2022; 17:e202200106. [PMID: 35333438 DOI: 10.1002/asia.202200106] [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: 02/04/2022] [Revised: 03/24/2022] [Indexed: 11/12/2022]
Abstract
Methionine is an essential amino acid involved in many physiological and pathological processes. Methionine starvation caused by methionine decarboxylase ( MetDC) degradation becomes a promising strategy for cancer treatment. Multistep colorimetric method, the present approach to monitor the MetDC activity, possesses drawbacks of the complicated process, low accuracy, and poor anti-interference due to indirect detecting. Herein, we report a facile and easy-to-use supramolecular tandem assay (STA) with cucurbit[7]uril and acridine orange reporter pair for the direct and real-time monitoring of MetDC activity. The applicability of this strategy for measuring enzyme-kinetic parameters and screening of inhibitors are also demonstrated. The STA for MetDC activity detection not only provides a feasible method for methionine-related disease diagnosing but also opens a perspective for cancer therapy.
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Affiliation(s)
- Zhe Zheng
- China University of Mining and Technology - Xuzhou Campus: China University of Mining and Technology, School of Chemical Engineering & Technology, No. 1, Daxue Road, 221116, XuZhou, CHINA
| | - Siying Ren
- China University of Mining and Technology - Xuzhou Campus: China University of Mining and Technology, School of Chemical Engineering & Technology, CHINA
| | - Wen-Chao Geng
- Tianjin Institute of Industrial Biotechnology Chinese Academy of Sciences, Key Laboratory of Systems Microbial Biotechnology, CHINA
| | - Xuexian Cui
- Institute of Microbiology Chinese Academy of Sciences, CAS Key Laboratory of Microbial Physiological and Metabolic Engineering, State Key Laboratory of Microbial Resources, CHINA
| | - Bian Wu
- Institute of Microbiology Chinese Academy of Sciences, CAS Key Laboratory of Microbial Physiological and Metabolic Engineering, State Key Laboratory of Microbial Resources, CHINA
| | - Hong Wang
- China University of Mining and Technology, School of Chemical Engineering & Technology, No1,Daxue Road, 221116, Xuzhou, CHINA
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Oda Y, Nakata K, Miyano H, Mizukoshi T, Yamaguchi H, Kashiwagi T. Structural insights into the enhanced thermostability of cysteine substitution mutants of L-histidine decarboxylase from Photobacterium phosphoreum. J Biochem 2021; 171:31-40. [PMID: 34622278 DOI: 10.1093/jb/mvab103] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Accepted: 10/01/2021] [Indexed: 11/13/2022] Open
Abstract
Enzymatic amino acid assays are important in physiological research and clinical diagnostics because abnormal amino acid concentrations in biofluids are associated with various diseases. L-histidine decarboxylase from Photobacterium phosphoreum (PpHDC) is a pyridoxal 5'-phosphate-dependent enzyme and a candidate for use in an L-histidine quantitation assay. Previous cysteine substitution experiments demonstrated that the PpHDC C57S mutant displayed improved long-term storage stability and thermostability when compared with those of the wild-type enzyme. In this study, combinational mutation experiments of single cysteine substitution mutants of PpHDC were performed, revealing that the PpHDC C57S/C101V/C282V mutant possessed the highest thermostability. The stabilizing mechanism of these mutations were elucidated by solving the structures of PpHDC C57S and C57S/C101V/C282V mutants by X-ray crystallography. In the crystal structures, two symmetry-related PpHDC molecules form a domain-swapped homodimer. The side chain of S57 is solvent exposed in the structure, indicating that the C57S mutation eliminates chemical oxidation or disulfide bond formation with a free thiol group, thereby providing greater stability. Residues 101 and 282 form hydrophobic interactions with neighboring hydrophobic residues. Mutations C101V and C282V enhanced thermostability of PpHDC by filling a cavity present in the hydrophobic core (C101V) and increasing hydrophobic interactions.
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Affiliation(s)
- Yuki Oda
- Ajinomoto Co., Inc., Kawasaki, Kanagawa 210-8681, Japan
| | - Kunio Nakata
- Ajinomoto Co., Inc., Kawasaki, Kanagawa 210-8681, Japan
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Okawa A, Shiba T, Hayashi M, Onoue Y, Murota M, Sato D, Inagaki J, Tamura T, Harada S, Inagaki K. Structural basis for substrate specificity of l-methionine decarboxylase. Protein Sci 2021; 30:663-677. [PMID: 33452696 DOI: 10.1002/pro.4027] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 12/09/2020] [Accepted: 01/11/2021] [Indexed: 11/08/2022]
Abstract
l -Methionine decarboxylase (MetDC) from Streptomyces sp. 590 is a vitamin B6 -dependent enzyme and catalyzes the non-oxidative decarboxylation of l -methionine to produce 3-methylthiopropylamine and carbon dioxide. We present here the crystal structures of the ligand-free form of MetDC and of several enzymatic reaction intermediates. Group II amino acid decarboxylases have many residues in common around the active site but the residues surrounding the side chain of the substrate differ. Based on information obtained from the crystal structure, and mutational and biochemical experiments, we propose a key role for Gln64 in determining the substrate specificity of MetDC, and for Tyr421 as the acid catalyst that participates in protonation after the decarboxylation reaction.
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Affiliation(s)
- Atsushi Okawa
- Department of Biofunctional Chemistry, Okayama University, Okayama, Japan
| | - Tomoo Shiba
- Department of Applied Biology, Kyoto Institute of Technology, Kyoto, Japan.,The Center for Advanced Insect Research Promotion (CAIRP), Kyoto Institute of Technology, Kyoto, Japan
| | - Masaya Hayashi
- Department of Biofunctional Chemistry, Okayama University, Okayama, Japan
| | - Yuki Onoue
- Department of Applied Biology, Kyoto Institute of Technology, Kyoto, Japan
| | - Masaki Murota
- Department of Applied Biology, Kyoto Institute of Technology, Kyoto, Japan
| | - Dan Sato
- Department of Applied Biology, Kyoto Institute of Technology, Kyoto, Japan
| | - Junko Inagaki
- Dentistry and Pharmaceutical Sciences, Okayama University Graduate School of Medicine, Okayama, Japan
| | - Takashi Tamura
- Department of Biofunctional Chemistry, Okayama University, Okayama, Japan
| | - Shigeharu Harada
- Department of Applied Biology, Kyoto Institute of Technology, Kyoto, Japan
| | - Kenji Inagaki
- Department of Biofunctional Chemistry, Okayama University, Okayama, Japan
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