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2004•Phosphorus, sulfur, and silicon and the related elementsRequires access

THE CONDENSED PHOSPHATES AS INHIBITORS OF THE ZINC-ENZYME CARBONIC ANHYDRASE II

Rodica Căpriță, Adrian Cǎpriţǎ, Gheorghe Ilia

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Abstract

The mobilization of the zinc ion from the zinc enzyme BCA II by the condensed phosphates pyrophosphate (PP), tripolyphosphate (TPP), and higher polyphosphate (HPP) induces the inhibition of the enzymatic activity. The chelating capacity increases with the ligand concentration and with the length of the polyphosphatic chain. The activity is restored when the polyphosphate is hydrolyzed, becoming incapable of chelating the zinc ion, which is able to reform the zinc enzyme.

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What this paper is about

The mobilization of the zinc ion from the zinc enzyme BCA II by the condensed phosphates pyrophosphate (PP), tripolyphosphate (TPP), and higher polyphosphate (HPP) induces the inhibition of the enzymatic activity. The chelating capacity increases with the ligand concentration and with the length of the polyphosphatic chain. The activity is restored when the polyphosphate is hydrolyzed, becoming incapable of chelating the zinc ion, which is able to reform the zinc enzyme.

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Available abstract

The mobilization of the zinc ion from the zinc enzyme BCA II by the condensed phosphates pyrophosphate (PP), tripolyphosphate (TPP), and higher polyphosphate (HPP) induces the inhibition of the enzymatic activity. The chelating capacity increases with the ligand concentration and with the length of the polyphosphatic chain. The activity is restored when the polyphosphate is hydrolyzed, becoming incapable of chelating the zinc ion, which is able to reform the zinc enzyme.

Key concepts: Polyphosphate, Pyrophosphate, Zinc, Chemistry, Carbonic anhydrase, Chelation, Enzyme, Hydrolysis

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