1887

Abstract

MbtH-like proteins are a family of small proteins encoded by genes found in many, but not all, non-ribosomal peptide synthetase-encoding gene clusters that direct the biosynthesis of peptide antibiotics and siderophores. Studies published to date have not elucidated the function of MbtH-like proteins, nor have they clarified whether they are required for metabolite biosynthesis. Here it is shown that only one of two genes ( or ) encoding MbtH-like proteins in is required for biosynthesis of the peptide siderophore coelichelin and the calcium-dependent peptide antibiotic (CDA). The and genes can functionally complement each other , suggesting that CdaX and CchK can cross-talk with the coelichelin and CDA biosynthetic pathways, respectively. Transcriptional analyses of wild-type and a double replacement mutant indicate that CchK and CdaX may not be involved in transcriptional regulation of coelichelin and CDA biosynthetic gene clusters.

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2007-05-01
2019-10-15
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vol. , part 5, pp. 1405-1412

A table of oligonucleotide primers used in this study is available here.



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