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• W2120976955 abstract "Corynebacterium glutamicum cg1790/pgk encodes an enzyme active as a 3-phosphoglycerate kinase (PGK) (EC 2.7.2.3) catalyzing phosphoryl transfer from 1,3-biphosphoglycerate (bPG) to ADP to yield 3-phosphoglycerate (3-PG) and ATP in substrate chain phosphorylation. C. glutamicum 3-phosphoglycerate kinase was purified to homogeneity from the soluble fraction of recombinant E. coli. PGKHis was found to be active as a homodimer with molecular weight of 104 kDa. The enzyme preferred conditions of pH 7.0 to 7.4 and required Mg2+ for its activity. PGKHis is thermo labile and it has shown maximal activity at 50–65°C. The maximal activity of PGKHis was estimated to be 220 and 150 U mg-1 with KM values of 0.26 and 0.11 mM for 3-phosphoglycerate and ATP, respectively. A 3-phosphoglycerate kinase negative C. glutamicum strain ∆pgk was constructed and shown to lack the ability to grow under glycolytic or gluconeogenic conditions unless PGK was expressed from a plasmid to restore growth. When pgk was overexpressed in L-arginine and L-ornithine production strains the production increased by 8% and by 17.5%, respectively. Unlike many bacterial PGKs, C. glutamicum PGK is active as a homodimer. PGK is essential for growth of C. glutamicum with carbon sources requiring glycolysis and gluconeogenesis. Competitive inhibition by ADP reveals the critical role of PGK in gluconeogenesis by energy charge. Pgk overexpression improved the productivity in L-arginine and L-ornithine production strains." @default.
• W2120976955 created "2016-06-24" @default.
• W2120976955 creator A5045955900 @default.
• W2120976955 creator A5091393671 @default.
• W2120976955 date "2014-01-01" @default.
• W2120976955 modified "2023-09-27" @default.
• W2120976955 title "Characterization of 3-phosphoglycerate kinase from Corynebacterium glutamicum and its impact on amino acid production" @default.
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• W2120976955 doi "https://doi.org/10.1186/1471-2180-14-54" @default.
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