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Nucleic acid enzymology of extremely halophilic bacteria. Halobacterium cutirubrum deoxyribonucleic acid-dependent ribonucleic acid polymerase.


ABSTRACT: 1. DNA-dependent RNA polymerase was purified 150-fold from crude extracts of the extreme halophile Halobacterium cutirubrum. 2. The enzyme requires the presence of native DNA and all four nucleoside triphosphates to incorporate (14)C-labelled nucleoside triphosphate into an acid-insoluble ribonuclease-sensitive product. 3. It has an absolute requirement for both Mn(2+) and Mg(2+). 4. The polymerase requires a high salt concentration for stability, but is markedly inhibited by univalent cations. 5. Its molecular weight is very low compared with that of Escherichia coli RNA polymerase.

SUBMITTER: Louis BG 

PROVIDER: S-EPMC1176638 | biostudies-other | 1971 Feb

REPOSITORIES: biostudies-other

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