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dc.contributor.author Whitworth, David E.
dc.contributor.author Hodgson, David A.
dc.date.accessioned 2008-12-04T17:07:48Z
dc.date.available 2008-12-04T17:07:48Z
dc.date.issued 2008-12-04
dc.identifier.citation Whitworth , D E & Hodgson , D A 2008 , ' Light-induced carotenogenesis in Myxococcus xanthus: evidence that CarS acts as an anti-repressor of CarA ' Molecular Microbiology , pp. 809-819 . en
dc.identifier.other PURE: 100086
dc.identifier.other dspace: 2160/1388
dc.identifier.uri http://hdl.handle.net/2160/1388
dc.identifier.uri http://www.ingentaconnect.com/content/bsc/mole/2001/00000042/00000003/art02679 en
dc.description David E. Whitworth, David A. Hodgson (2001). Light-induced carotenogenesis in Myxococcus xanthus: evidence that CarS acts as an anti-repressor of CarA. Molecular Microbiology, 42(3), 809-819. en
dc.description.abstract In the bacterium Myxococcus xanthus, carotenoids are produced in response to illumination, as a result of expression of the crt carotenoid biosynthesis genes. The majority of crt genes are clustered in the crtEBDC operon, which is repressed in the dark by CarA. Genetic data suggest that, in the light, CarS is synthesized and achieves activation of the crtEBDC operon by removing the repressive action of CarA. As CarS contains no known DNA-binding motif, the relief of CarA-mediated repression was postulated to result from a direct interaction between these two proteins. Use of the yeast two-hybrid system demonstrated direct interaction between CarA and CarS. The two-hybrid system also implied that CarA and, possibly, CarS are capable of homodimerization. Direct evidence for CarS anti-repressor action was provided in vitro. A glutathione S-transferase (GST)¿CarA protein fusion was shown to bind specifically to a palindromic operator sequence within the crtEBDC promoter. CarA was prevented from binding to its operator, and prebound CarA was removed by the addition of purified CarS. CarS is therefore an anti-repressor. en
dc.format.extent 11 en
dc.language.iso eng
dc.relation.ispartof Molecular Microbiology en
dc.title Light-induced carotenogenesis in Myxococcus xanthus: evidence that CarS acts as an anti-repressor of CarA en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.contributor.institution Institute of Biological, Environmental and Rural Sciences en
dc.description.status Peer reviewed en


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