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A rapid method for the isolation of ribonuclease from yeast (Saccharomyces carlsbergensis).

ABSTRACT: A ribonuclease (RNAase; EC 3.1.14.1) from brewer's yeast was purified 90-fold. Crude RNAase was initially separated from other proteins by precipitation at pH 4.0 after incubation of the mechanically disrupted yeast cells at pH 6.0 and 52 degrees C for 30 min. The RNAase was purified from the supernatant by ultrafiltration with a PM-30 membrane and adsorption chromatography on hydroxyapatite. RNAase preparation was free of phosphatase, deoxyribonuclease and phosphodiesterase activities. It showed maximum activity at pH 6.0 and a temperature optimum of 52 degrees C with yeast RNA as substrate. This RNAase hydrolysed yeast RNA to nucleoside 3'-phosphates and showed no evidence of base specificity.

SUBMITTER: Shetty JK

PROVIDER: S-EPMC1162006 | biostudies-other | 1980 Aug

REPOSITORIES: biostudies-other

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Genome sequence of Saccharomyces carlsbergensis, the world's first pure culture lager yeast.

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