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. 1980 Jan 15;186(1):191–199. doi: 10.1042/bj1860191

The mother-cell-membrane adenosine triphosphatase of sporulating Clostridium pasteurianum

David J Clarke 1, J Gareth Morris 1
PMCID: PMC1161519  PMID: 6245640

Abstract

1. Sporulation of Clostridium pasteurianum effects several changes in its proton-translocating cell-membrane H+-ATPase. Notable among these are the acquisition of susceptibility to activation by trypsin and a changed protein subunit composition. 2. A protein was isolated from the mother-cell membrane that inhibited the ATP phosphohydrolase activity of purified vegetative-cell-membrane H+-ATPase [BF0F1 complex, which consists of soluble ATPase (BF1) and the proton-channel component (BF0)] and rendered it susceptible to trypsin activation. 3. This trypsin-sensitive inhibitor protein had a molecular weight of 10000 and on sodium dodecyl sulphate/polyacrylamide-gel electrophoresis was indistinguishable from the novel protein subunit e of the mother-cell-membrane ATPase 4. In bacteriorhodopsin-containing everted membrane vesicles, the specific ATP synthetase activity of the mother-cell-membrane ATPase was significantly greater than that of the vegetative-cell-membrane ATPase. 5. Treatment with trypsin-sensitive inhibitor protein of artificial proteoliposomes containing bacteriorhodopsin and vegetative-cell-membrane H+-ATPase (BF0F1) significantly increased the specific ATP synthetase activity of this enzyme. 6. The ATP synthetase activity of crude cell-membrane preparations from cultures of Clostridium pasteurianum increased during that period in the course of sporulation when the membrane ATP phosphohydrolase was both most rapidly decreasing in specific activity and acquiring its susceptibility to activation by trypsin.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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