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Yang JI, Jung HC, Oh HM, Choi BG, Lee HS, Kang SG. NADP + or CO 2 reduction by frhAGB-encoded hydrogenase through interaction with formate dehydrogenase 3 in the hyperthermophilic archaeon Thermococcus onnurineus NA1. Appl Environ Microbiol 2023; 89:e0147423. [PMID: 37966269 PMCID: PMC10734459 DOI: 10.1128/aem.01474-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Accepted: 09/23/2023] [Indexed: 11/16/2023] Open
Abstract
IMPORTANCE The strategy using structural homology with the help of structure prediction by AlphaFold was very successful in finding potential targets for the frhAGB-encoded hydrogenase of Thermococcus onnurineus NA1. The finding that the hydrogenase can interact with FdhB to reduce the cofactor NAD(P)+ is significant in that the enzyme can function to supply reducing equivalents, just as F420-reducing hydrogenases in methanogens use coenzyme F420 as an electron carrier. Additionally, it was identified that T. onnurineus NA1 could produce formate from H2 and CO2 by the concerted action of frhAGB-encoded hydrogenase and formate dehydrogenase Fdh3.
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Affiliation(s)
- Ji-in Yang
- Marine Biotechnology Research Center, Korea Institute of Ocean Science & Technology, Busan, South Korea
- Department of Applied Ocean Science, University of Science and Technology, Daejeon, South Korea
| | - Hae-Chang Jung
- Marine Biotechnology Research Center, Korea Institute of Ocean Science & Technology, Busan, South Korea
| | | | - Bo Gyoung Choi
- Marine Biotechnology Research Center, Korea Institute of Ocean Science & Technology, Busan, South Korea
| | - Hyun Sook Lee
- Marine Biotechnology Research Center, Korea Institute of Ocean Science & Technology, Busan, South Korea
- Department of Applied Ocean Science, University of Science and Technology, Daejeon, South Korea
| | - Sung Gyun Kang
- Marine Biotechnology Research Center, Korea Institute of Ocean Science & Technology, Busan, South Korea
- Department of Applied Ocean Science, University of Science and Technology, Daejeon, South Korea
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Lever J, Kreuder F, Henry J, Hung A, Allard PM, Brkljača R, Rix C, Taki AC, Gasser RB, Kaslin J, Wlodkowic D, Wolfender JL, Urban S. Targeted Isolation of Antibiotic Brominated Alkaloids from the Marine Sponge Pseudoceratina durissima Using Virtual Screening and Molecular Networking. Mar Drugs 2022; 20:md20090554. [PMID: 36135743 PMCID: PMC9503778 DOI: 10.3390/md20090554] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 08/22/2022] [Accepted: 08/25/2022] [Indexed: 11/23/2022] Open
Abstract
Many targeted natural product isolation approaches rely on the use of pre-existing bioactivity information to inform the strategy used for the isolation of new bioactive compounds. Bioactivity information can be available either in the form of prior assay data or via Structure Activity Relationship (SAR) information which can indicate a potential chemotype that exhibits a desired bioactivity. The work described herein utilizes a unique method of targeted isolation using structure-based virtual screening to identify potential antibacterial compounds active against MRSA within the marine sponge order Verongiida. This is coupled with molecular networking-guided, targeted isolation to provide a novel drug discovery procedure. A total of 12 previously reported bromotyrosine-derived alkaloids were isolated from the marine sponge species Pseudoceratina durissima, and the compound, (+)-aeroplysinin-1 (1) displayed activity against the MRSA pathogen (MIC: <32 µg/mL). The compounds (1−3, 6 and 9) were assessed for their central nervous system (CNS) interaction and behavioral toxicity to zebrafish (Danio rerio) larvae, whereby several of the compounds were shown to induce significant hyperactivity. Anthelmintic activity against the parasitic nematode Haemonchus contorutus was also evaluated (2−4, 6−8).
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Affiliation(s)
- James Lever
- School of Science (Applied Chemistry and Environmental Sciences), RMIT University, GPO Box 2476 Melbourne, VIC 3001, Australia
| | - Florian Kreuder
- Australian Regenerative Medicine Institute, Monash University, Clayton, VIC 3800, Australia
| | - Jason Henry
- Neurotoxicology Lab., School of Science (Biosciences), RMIT University, Bundoora, VIC 3083, Australia
| | - Andrew Hung
- School of Science (Applied Chemistry and Environmental Sciences), RMIT University, GPO Box 2476 Melbourne, VIC 3001, Australia
| | | | - Robert Brkljača
- Monash Biomedical Imaging, Monash University, Clayton, VIC 3168, Australia
| | - Colin Rix
- School of Science (Applied Chemistry and Environmental Sciences), RMIT University, GPO Box 2476 Melbourne, VIC 3001, Australia
| | - Aya C. Taki
- Department of Veterinary Biosciences, Melbourne Veterinary School, Faculty of Veterinary and Agriculture Sciences, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Robin B. Gasser
- Department of Veterinary Biosciences, Melbourne Veterinary School, Faculty of Veterinary and Agriculture Sciences, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Jan Kaslin
- Australian Regenerative Medicine Institute, Monash University, Clayton, VIC 3800, Australia
| | - Donald Wlodkowic
- Neurotoxicology Lab., School of Science (Biosciences), RMIT University, Bundoora, VIC 3083, Australia
| | - Jean-Luc Wolfender
- School of Pharmaceutical Sciences of Western Switzerland, University of Geneva, CMU, Rue Michel-Servet 1, 1211 Geneva, Switzerland
- Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, CMU, 1211 Geneva, Switzerland
| | - Sylvia Urban
- School of Science (Applied Chemistry and Environmental Sciences), RMIT University, GPO Box 2476 Melbourne, VIC 3001, Australia
- Correspondence:
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Structural analysis revealed a novel conformation of the NTRC reductase domain from Chlamydomonas reinhardtii. J Struct Biol 2021; 214:107829. [PMID: 34974142 DOI: 10.1016/j.jsb.2021.107829] [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: 09/17/2021] [Revised: 12/07/2021] [Accepted: 12/27/2021] [Indexed: 11/20/2022]
Abstract
In plant chloroplasts, thiol regulation is driven by two systems. One relies on the activity of thioredoxins through their light dependent reduction by ferredoxin via a ferredoxin-thioredoxin reductase (FTR). In the other system, a NADPH-dependent redox regulation is driven by a NADPH-thioredoxin reductase C (NTRC). While the thioredoxin system has been deeply studied, a more thorough understanding of the function of this plant specific NTRC is desirable. NTRC is a single polypeptide harbouring a thioredoxin domain (Trx) at the C-terminus of a NADPH-dependent Thioredoxin reductase (TrxR). To provide functional and structural insights, we studied the crystal structure of the TrxR domain of the NTRC from Chlamydomonas reinhardtii (CrNTRC, Cre01.g054150.t1.2) and its Cys136Ser (C136S) mutant, which is characterized by the mutation of the resolving cysteine in the active site of the TrxR domain. Furthermore, we confirmed the role of NTRC as electron donor for 2-Cys peroxiredoxin (PRX) also in C. reinhardtii. The structural data of TrxR were employed to develop a scheme of action which addresses electron transfer between TrxR and Trx of NTRC and between NTRC and its substrates.
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Chun HL, Chang YJ, Park HH. Crystal structure of the cofactor-free form of thioredoxin reductase from Acinetobacter baumannii. FEBS Lett 2021; 595:1977-1986. [PMID: 34118067 DOI: 10.1002/1873-3468.14149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 06/02/2021] [Accepted: 06/07/2021] [Indexed: 11/09/2022]
Abstract
Thioredoxin reductase (TrxR) is a central component in the thioredoxin system by involving in catalyzing the reduction of thioredoxin, which is critical for organism survival. Because this system is essential, it is a promising target for novel antimicrobial agents. Herein, we solved the 1.9 Å high-resolution structure of TrxR from Acinetobacter baumannii Thioredoxin reductase (AbTrxR), which is a Gram-negative, pathogenic bacterium and a drug-resistant superbug. AbTrxR was cofactor-free and formed a dimer in solution. AbTrxR contained a longer dimerization loop2 and a shorter β7 -β8 connecting loop than other TrxRs. AbTrxR cofactor-free form exhibited a flavin-oxidizing (FO) conformation, whose NADPH domain was located close to the dimeric interface. This structural information might be helpful for development of new antibiotic agents targeting superbugs.
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Affiliation(s)
- Hye Lin Chun
- College of Pharmacy, Chung-Ang University, Seoul, Korea.,Department of Global Innovative Drugs, Graduate School of Chung-Ang University, Seoul, Korea
| | - Ye Ji Chang
- College of Pharmacy, Chung-Ang University, Seoul, Korea.,Department of Global Innovative Drugs, Graduate School of Chung-Ang University, Seoul, Korea
| | - Hyun Ho Park
- College of Pharmacy, Chung-Ang University, Seoul, Korea.,Department of Global Innovative Drugs, Graduate School of Chung-Ang University, Seoul, Korea
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