UNSPECIFIED (1993) LIGHT-INDUCED CAROTENOGENESIS IN MYXOCOCCUS-XANTHUS - GENETIC-ANALYSIS OF THE CARR REGION. MOLECULAR MICROBIOLOGY, 7 (3). pp. 471-488. ISSN 0950-382X

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Abstract

Carotenogenesis is light-inducible in the non-photosynthetic, Gram-negative, bacterium Myxococcus xanthus. We report the characterization of the carR region which controls this phenomenon. Insertion of transposon Tn5 close to the carR region caused a dominant, carotenoid-constitutive mutation because of the presence of a constitutive, outward-reading promoter in the IS50L component of Tn5. In wild-type cells, a powerful, tightly-regulated, light-inducible promoter directs the transcription of two genetic functions. One of these functions is to activate transcription of the genetically unlinked carB gene, which is involved in carotenoid synthesis. The second function (carR) regulates the light-inducible promoter. We also report the mapping of two carotenoid constitutive mutations to the previously characterized carA locus.

Item Type:	Journal Article
Subjects:	Q Science > QD Chemistry Q Science > QR Microbiology
Journal or Publication Title:	MOLECULAR MICROBIOLOGY
Publisher:	BLACKWELL SCIENCE LTD
ISSN:	0950-382X
Date:	February 1993
Volume:	7
Number:	3
Number of Pages:	18
Page Range:	pp. 471-488
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/21551

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