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| Content Provider | PubMed Central |
|---|---|
| Author | Satre, M. Bof, M. Vignais, P. V. |
| Abstract | Aurovertins B and D inhibited the adenosine triphosphatase (ATPase) activity of soluble Escherichia coli coupling factor ATPase (BF1) isolated from wile-type E. coli K-12. Half inhibition was obtained with 2 microns aurovertin B and 0.9 microns aurovertin D. Aurovertins B and D had no inhibitory effect on BF1 isolated from the aurovertin-resistant E. coli mutant MA12. Acetylation or saponification of aurovertin D yielded a derivative which was devoid of inhibitory effect on BF1. Citreoviridin also inhibited wild-type BF1 but with much less efficiency (half inhibition at 60 microns) than aurovertin. Citreoviridin had no effect on the aurovertin-resistant BF1. The fluorescence intensity of aurovertins B and D was markedly enhanced upon addition to purified BF1. There was no enhancement of fluorescence when the aurovertins were added to BF1 isolated from the aurovertin-resistant mutant. The fluorescence of the aurovertin-BF1 complex was enhanced by adenosine 5'-diphosphate and by low concentrations of adenosine 5'-triphosphate. The adenosine 5'-diphosphate-enhanced fluorescence of the aurovertin-BF1 complex was quenched by high concentrations of adenosine 5'-triphosphate or by MG2+. Aurovertin bound selectively to the beta subunit of BF1 isolated from wile-type cells. By complementation assays in vitro, using a reconstituted system made of subunits isolated from wild-type and aurovertin-resistant BF1, it was shown that the altered peptide in aurovertin-resistant BF1 was the beta subunit. |
| Starting Page | 768 |
| File Format | |
| ISSN | 10985530 |
| e-ISSN | 10985530 |
| Journal | Journal of Bacteriology |
| Issue Number | 3 |
| Volume Number | 142 |
| Language | English |
| Publisher Date | 1980-06-01 |
| Access Restriction | Open |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Molecular Biology Microbiology |
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