Effect of sulphur pollutants on some enzymatic activities of streptomyces Rimosus

ABSTRACT

Some enzymatic activities of Streptomyces rimosus, grown in media containing different concentrations of inorganic sulphur compounds were examined. It seems that exopeptidases were very highly stimulated by sulphite or persulphate, followed equally by thiosulfate or sulphate whereas sulphide was inhibitory. Persulphate induced the maximum activity of endopeptidases, followed by sulphate whereas sulphite exerted no effect, while either thiosulfate or increased with state of oxidation of the sulphur source, though sulphite ion exerted the least effect and induced the maximum stimulation for alkaline phosphatase activity followed by thiosulfate and least by the other sources. Dithionates seemed to be more effective in stimulating GPT than monothionates especially at the higher state of oxidation. GOT activity was hardly affected by the lower concentrations of the sulphur source except sulphate ions that were remarkably stimulatory, followed by sulphite ions. Higher concentrations of the sulphur sources equally enhanced GOT activity