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Kim J, Oh EK, Kim EJ, Lee JK. Photoautotrophic Growth Rate Enhancement of Synechocystis sp. PCC6803 by Heterologous Production of 2-Oxoglutarate:Ferredoxin Oxidoreductase from Chlorobaculum tepidum. BIOLOGY 2022; 12:biology12010059. [PMID: 36671751 PMCID: PMC9855186 DOI: 10.3390/biology12010059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/27/2022] [Accepted: 12/27/2022] [Indexed: 01/01/2023]
Abstract
2-Oxoglutarate:ferredoxin oxidoreductase from Chlorobaculum tepidum (CtOGOR) is a carbon-fixing enzyme in the reductive TCA cycle that reversibly carboxylates succinyl-CoA to yield 2-oxoglutarate. CtOGOR is a heterotetramer of two large (α = 68 kDa) and two small (β = 38 kDa) subunits. The αβ protomer harbors one thiamine pyrophosphate and two 4Fe-4S clusters. Nonetheless, the enzyme has a considerable oxygen tolerance with a half-life of 143 min at 215 μM dissolved oxygen. Kinetic analyses of the purified recombinant CtOGOR revealed a lower Km for succinyl-CoA than for 2-oxoglutarate. Cellular levels of 2-oxoglutarate and glutamate—a product of glutamine oxoglutarate aminotransferase and glutamate dehydrogenase—increased more than twofold in the exponential phase compared with the control strain, leading to an approximately >30% increase in the photoautotrophic growth rate. Thus, CtOGOR was successfully produced in Synechocystis, thereby boosting carboxylation, resulting in enhanced photoautotrophic growth.
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Affiliation(s)
- June Kim
- Department of Life Science, Sogang University, Seoul 121-742, Republic of Korea
| | - Eun Kyoung Oh
- Department of Life Science, Sogang University, Seoul 121-742, Republic of Korea
| | - Eui-Jin Kim
- Microbial Research Department, Nakdonggang National Institute of Biological Resources, Sangju 37242, Republic of Korea
- Correspondence: (E.-J.K.); (J.K.L.); Tel.: +82-54-530-0860 (E.-J.K.); +82-2-705-8459 (J.K.L.); Fax: +82-54-530-0869 (E.-J.K.); +82-2-704-3601 (J.K.L.)
| | - Jeong K. Lee
- Department of Life Science, Sogang University, Seoul 121-742, Republic of Korea
- Correspondence: (E.-J.K.); (J.K.L.); Tel.: +82-54-530-0860 (E.-J.K.); +82-2-705-8459 (J.K.L.); Fax: +82-54-530-0869 (E.-J.K.); +82-2-704-3601 (J.K.L.)
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Ma Q, Wang X, Luan F, Han P, Zheng X, Yin Y, Zhang X, Zhang Y, Gao X. Functional Studies on an Indel Loop between the Subtypes of meso-Diaminopimelate Dehydrogenase. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01799] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Qinyuan Ma
- School of Life Science and Medicine, Shandong University of Technology, Zibo 255000, China
| | - Xiaoxiao Wang
- School of Life Science and Medicine, Shandong University of Technology, Zibo 255000, China
| | - Fang Luan
- School of Life Science and Medicine, Shandong University of Technology, Zibo 255000, China
| | - Ping Han
- School of Life Science and Medicine, Shandong University of Technology, Zibo 255000, China
| | - Xue Zheng
- School of Life Science and Medicine, Shandong University of Technology, Zibo 255000, China
| | - Yanmiao Yin
- School of Life Science and Medicine, Shandong University of Technology, Zibo 255000, China
| | - Xianghe Zhang
- School of Life Science and Medicine, Shandong University of Technology, Zibo 255000, China
| | - Yàning Zhang
- School of Life Science and Medicine, Shandong University of Technology, Zibo 255000, China
| | - Xiuzhen Gao
- School of Life Science and Medicine, Shandong University of Technology, Zibo 255000, China
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Hirasawa M, Solis J, Vaidyanathan N, Srivastava AP, Wynn RM, Sutton RB, Knaff DB. Identification of the ferredoxin interaction sites on ferredoxin-dependent glutamate synthase from Synechocystis sp. PCC 6803. PHOTOSYNTHESIS RESEARCH 2017; 134:317-328. [PMID: 28975508 DOI: 10.1007/s11120-017-0446-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Accepted: 09/19/2017] [Indexed: 06/07/2023]
Abstract
Based on in silico docking methods, five amino acids in glutamate synthase (Gln-467, His-1144, Asn-1147, Arg-1162, and Trp-676) likely constitute key binding residues in the interface of a glutamate synthase:ferredoxin complex. Although all interfacial mutants studied showed the ability to form a complex under low ionic strength, these docking mutations showed significantly less ferredoxin-dependent activities, while still retaining enzymatic activity. Furthermore, isothermal titration calorimetry showed a possible 1:2 molar ratio between the wild-type glutamate synthase and ferredoxin. However, each of our interfacial mutants showed only a 1:1 complex with ferredoxin, suggesting that the mutations directly affect the glutamate synthase:ferredoxin heterodimer interface.
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Affiliation(s)
- Masakazu Hirasawa
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX, 79409-1061, USA
| | - Jacaranda Solis
- Center for Biotechnology and Genomics, Texas Tech University, Lubbock, TX, 79409-3132, USA
- Immunology and Molecular Microbiology, Texas Tech University Health Science Center, Lubbock, TX, 79430-6591, USA
| | - Nanditha Vaidyanathan
- Center for Biotechnology and Genomics, Texas Tech University, Lubbock, TX, 79409-3132, USA
- Depuy Synthes Companies, 1302 Wrights Lane East, West Chester, PA, 19380, USA
| | - Anurag P Srivastava
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX, 79409-1061, USA
- Department of Biochemistry and Molecular Biology, Rosalind Franklin University of Medicine and Science, North Chicago, Illinoi, 60064, USA
| | - R Max Wynn
- Departments of Internal Medicine and Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX, 75390-9038, USA.
| | - Roger B Sutton
- Department of Cell Physiology and Molecular Biophysics, Texas Tech Health Science Center, Lubbock, TX, 79430-6551, USA
| | - David B Knaff
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX, 79409-1061, USA
- Center for Biotechnology and Genomics, Texas Tech University, Lubbock, TX, 79409-3132, USA
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Zeng DD, Qin R, Li M, Alamin M, Jin XL, Liu Y, Shi CH. The ferredoxin-dependent glutamate synthase (OsFd-GOGAT) participates in leaf senescence and the nitrogen remobilization in rice. Mol Genet Genomics 2016; 292:385-395. [DOI: 10.1007/s00438-016-1275-z] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2016] [Accepted: 11/21/2016] [Indexed: 10/20/2022]
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