Title : Structure and kinetic analysis of H2S production by human mercaptopyruvate sulfurtransferase.

Pub. Date : 2013 Jul 5

PMID : 23698001






2 Functional Relationships(s)
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1 The kinetics of H2S production by MST from 3-MP was studied at pH 7.4 in the presence of various physiological persulfide acceptors: cysteine, dihydrolipoic acid, glutathione, homocysteine, and thioredoxin, and in the presence of cyanide. persulfides mercaptopyruvate sulfurtransferase Homo sapiens
2 The crystal structure analysis allows us to propose a detailed mechanism for MST in which an Asp-His-Ser catalytic triad is positioned to activate the nucleophilic cysteine residue and participate in general acid-base chemistry, whereas our kinetic analysis indicates that thioredoxin is likely to be the major physiological persulfide acceptor for MST. persulfides mercaptopyruvate sulfurtransferase Homo sapiens