In previous experiments, a Streptomyces aureofaciens gene highly similar to the sporulation-specific whiB gene of Streptomyces coelicolor was identified. By integrative transformation, via double cross-over, a stable null mutant of the whiB-homologous gene of S. aureofaciens was obtained. The disruption blocked differentiation at a stage between the formation of aerial mycelium and the development of mature spores, producing white aerial hyphae without septation. Expression of the whiB gene was investigated during differentiation by S1 nuclease mapping, using RNA prepared from S. aureofaciens in various developmental stages. Two putative promoters were identified upstream of the whiB coding region. The stronger promoter, whiB-P2, was induced at the beginning of aerial mycelium formation, and the weaker promoter, whiB-P1, was expressed fairly constantly during differentiation. No differences in the expression of the whiB promoters were detected in an rpoZ-disrupted S. aureofaciens strain. The promoter bearing DNA fragment was inserted into the promoter-probe vector pARC1 to produce an expression pattern consistent with the results of direct RNA analysis.

Institute of Molecular Biology Slovak Academy of Sciences Bratislava Slovak Republic

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J Gen Microbiol. 1972 Aug;72(1):9-28 PubMed

J Bacteriol. 1985 Apr;162(1):406-12 PubMed

Nucleic Acids Res. 1993 Aug 11;21(16):3647-52 PubMed

Annu Rev Microbiol. 1993;47:685-713 PubMed

Can J Microbiol. 1983 Jun;29(6):653-8 PubMed

Nucleic Acids Res. 1993 May 25;21(10):2512 PubMed

Methods Enzymol. 1980;65(1):499-560 PubMed

Mol Gen Genet. 1986 Jun;203(3):468-78 PubMed

Gene. 1994 May 27;143(1):101-3 PubMed

Biotechniques. 1994 Nov;17(5):838-42 PubMed

Mol Gen Genet. 1992 Apr;232(3):351-8 PubMed

Nucleic Acids Res. 1992 Mar 11;20(5):961-74 PubMed

J Gen Microbiol. 1983 Jul;129(7):2257-69 PubMed

J Bacteriol. 1992 Oct;174(19):6215-20 PubMed

J Bacteriol. 1983 Sep;155(3):1238-48 PubMed

J Gen Microbiol. 1976 Oct;96(2):299-315 PubMed

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