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  • Title: [Methylpyrophosphate, the simplext organic substrate of yeast inorganic phyrophosphatase].
    Author: Mel'nik MS, Nazarova TI, Avaeva SM.
    Journal: Biokhimiia; 1982 Feb; 47(2):323-8. PubMed ID: 6121587.
    Abstract:
    The interaction between yeast inorganic pyrophosphatase and the simplest organic substrate, methylpyrophosphate, was studied. Methylpyrophosphate hydrolysis occurred most intensively in the presence of Zn2+ less intensively in the presence of CO2+ and Mn2+ and did not occur at all in the presence of Mg2+. The complex convertible into reaction products contains two Zn2+ and one molecule of zinc methylpyrophosphate per one active center. The activator metal ions are linked with pyrophosphatase consecutively; each of the two enzyme forms produced can bind to the substrate. The values of the maximal velocity and the constants of the substrate binding to the pyrophosphatase were calculated.
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