[Some pathways of biosynthesis and degradation of polyphosphates from green algae Acetabularia mediterranea].

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Biokhimiia. 1977 Jun;42(6):1083-9.

[Some pathways of biosynthesis and degradation of polyphosphates from green algae Acetabularia mediterranea].

Biokhimiia (Moscow, Russia)

[Article in Russian]
P M Rubtsov, I S Kulaev

PMID: 19106

Abstract

The activity of ATP: polyphosphate phosphotransferase was detected in free-cellular extracts of Acetabularia mediterranea. The enzyme activity in cells originally deficient in phosphorus and subsequently transferred into the phosphate-containing medium increases 5-10-fold as compared to normal. Polyphosphate degradation in A. mediterranea is probably produced by polyphosphatase, which was also detected in the free-cellular extract. It was shown that the polyphosphatase activity has two pH optima, i.e. 4.5 and 7.5, and is considerably increased when the cells are transferred into the phosphate-free medium. It is assumed that high-molecular polyphosphates involved in A. Mediterranea metabolism are responsible for regulation of orthophosphate and ATP level in the cells by ATP: polyphosphate phosphotransferase and polyphosphatase.

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[Some pathways of biosynthesis and degradation of polyphosphates from green algae Acetabularia mediterranea].

Abstract

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