ISSN:
1617-4623
Keywords:
Streptomyces setonii ISP5395
;
Cryptic gene
;
Carotenogenesis
;
Sigma factor
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract In many species of actinomycetes, carotenogenesis can be photoinduced. The capacity to respond to photoinduction is, however unstable and, in various strains of Streptomyces, is lost at a relatively high frequency. In Streptomyces setonii ISP5395, which normally produces no carotenoids, carotenoid-producing mutants can be obtained following protoplast regeneration. We report here the characterization of a gene, crtS, which was isolated from one such mutant and can confer on wild-type S. setonii ISP5395 cells the capacity to synthesize carotenoids. Sequence analysis of crtS reveals an open reading frame, which shows homology to genes that encode alternative sigma factors in Bacillus subtilis. We propose that crtS encodes a sigma factor which is necessary for the expression of a cryptic gene(s) for carotenoid biosynthesis in S. setonii ISP5395.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00293207
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