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The Streptomyces coelicolor whiB gene encodes a small transcription factor-like protein dispensable for growth but essential for sporulation

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Summary

A non-sporulating mutant (whiB218) of Streptomyces coelicolor A3(2), which proved to contain a deletion of more than 5 kb of DNA including whiB, was complemented by a small cloned DNA fragment, deduced from DNA sequencing* to encode a protein of only 87 amino acids. This protein would bear some similarities to transcription factors, including an acidic, somewhat amphipathic α-helical region predicted near its N-terminus, and a basic α-helical region predicted at its C-terminus. A point mutation (whiB70) giving a phenotype indistinguishable from that of the whiB218 deletion mutant would cause a leucine to proline change at the start of the latter region. The whiB homologue from the closely related species S. lividans differed at only one base from its S. coelicolor counterpart, and would specify an identical polypeptide.

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Author notes

  1. N. K. Davis

    Present address: Genetics Department, Glaxo Group Research, Greenford Road, UB6 OHE, Greenford, Middlesex, UK

Authors and Affiliations

  1. John Innes Institute, John Innes Centre for Plant Science Research, Colney Lane, NR4 7UH, Norwich, UK

    N. K. Davis & K. F. Chater

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  1. N. K. Davis
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  2. K. F. Chater
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Additional information

Communicated by H. Hennecke

The accession number in the EMBL Data Library is X62287

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Davis, N.K., Chater, K.F. The Streptomyces coelicolor whiB gene encodes a small transcription factor-like protein dispensable for growth but essential for sporulation. Molec. Gen. Genet. 232, 351–358 (1992). https://doi.org/10.1007/BF00266237

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  • DOI: https://doi.org/10.1007/BF00266237

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