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Carbon-source-dependent transcriptional control involved in the initiation of cellular differentiation in Streptomyces griseus

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Abstract

Carbon source is one of the environmental factors that affects cellular differentiation of Streptomyces. We have identified the craA gene as a putative negative regulator involved in the carbon-source-dependent initiation of cellular differentiation in Streptomyces griseus. Carbon-source-dependent transcriptional repression of craA, which is caused by binding of a putative repressor protein to its promoter region, is proposed to result in the initiation of aerial mycelium formation. The presence of a craA homologue in the chromosome of Streptomyces coelicolor A3(2) implicates the existence of a similar regulatory mechanism in this organism. The repression of craA-promoter activity in glucose media could be alleviated not only by replacing glucose with maltose but also by supplying copper, which suggests that the stimulatory effect of copper on cellular differentiation in Streptomyces is excerted via abolishment of glucose-repression of craA.

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Correspondence to Kenji Ueda.

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Ueda, K., Endo, K., Takano, H. et al. Carbon-source-dependent transcriptional control involved in the initiation of cellular differentiation in Streptomyces griseus . Antonie Van Leeuwenhoek 78, 263–268 (2000). https://doi.org/10.1023/A:1010220614293

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  • DOI: https://doi.org/10.1023/A:1010220614293

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