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Kinetic mechanism of Enterococcus faecium D-aspartate ligaseŠkedelj, Veronika, 1983- ...Enterococcus faecium D-aspartate ligase (Aslfm) is a peptide bond-forming enzyme that is involved in the peptidoglycan assembly pathway. It catalyzes the ATP-dependent ligation of the ... beta-carboxylate of D-Asp to the epsilon-amino group of L-Lys in the nucleotide precursor UDP- MurNAc-pentapeptide. The enzyme is of interest as a target of new, potential, narrow-spectrum antibiotics directed against multiresistant E. faecium. The kinetic mechanism of Aslfm has not been fully characterized. To determine it, a progress curve analysis of Aslfm catalytic process using pyruvate kinase/lactate dehydrogenase ATPase detection assay was performed. With an inspection of the shape of measured progress curves and the results of specific qualitative experiments, the Aslfm reaction mechanism was singled out. The proposed Aslfm kinetics reaction scheme was evaluated by fitting the parameters of the corresponding differential equations to progress curves using the computer program ENZO. The complete kinetic analysis result is consistent with the substrate binding order 1) ATP, 2) D-Asp, and 3) UDP-MurNAc-pentapeptide. The analysis suggests that slowly establishing non-productive equilibria between the free and ATP-bound enzyme with the participating pentapeptide are responsible for initial reaction burst followed by a steady-state period before the complete depletion of the reactant added in the lowest concentration.Source: Biochimie. - ISSN 0300-9084 (Vol. 158, Mar. 2019, str. 217-223)Type of material - article, component part ; adult, seriousPublish date - 2019Language - englishCOBISS.SI-ID - 4668785
Author
Škedelj, Veronika, 1983- |
Pečar Fonović, Urša |
Molek, Peter |
Magnet, Sophie |
Mainardi, Jean-Luc |
Blanot, Didier |
Gobec, Stanislav, 1970- |
Stojan, Jure, 1956- |
Zega, Anamarija
Topics
Farmacevtska kemija |
D-aspartate ligase (Aslfm) |
Enterococcus faecium |
kinetic mechanism |
progress curve analysis
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Škedelj, Veronika, 1983- | 29903 |
Pečar Fonović, Urša | 19170 |
Molek, Peter | 32431 |
Magnet, Sophie | |
Mainardi, Jean-Luc | |
Blanot, Didier | |
Gobec, Stanislav, 1970- | 15284 |
Stojan, Jure, 1956- | 03723 |
Zega, Anamarija | 18633 |
Source: Personal bibliographies
and: SICRIS
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