Publication: Disruption of sscR encoding a γ-butyrolactone autoregulator receptor in Streptomyces scabies NBRC 12914 affects production of secondary metabolites
Issued Date
2008-04-01
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00155632
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2-s2.0-44349148445
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Mahidol University
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SCOPUS
Bibliographic Citation
Folia Microbiologica. Vol.53, No.2 (2008), 115-124
Suggested Citation
S. Kitani, M. Hoshika, T. Nihira Disruption of sscR encoding a γ-butyrolactone autoregulator receptor in Streptomyces scabies NBRC 12914 affects production of secondary metabolites. Folia Microbiologica. Vol.53, No.2 (2008), 115-124. doi:10.1007/s12223-008-0017-y Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/19342
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Title
Disruption of sscR encoding a γ-butyrolactone autoregulator receptor in Streptomyces scabies NBRC 12914 affects production of secondary metabolites
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Abstract
We report the cloning and sequence analysis of a γ-butyrolactone autoregulator regulatory island that includes an sscR gene encoding the γ-butyrolactone autoregulator receptor from Streptomyces scabies NBRC 12914, a plant pathogenic strain. γ-Butyrolactone autoregulators trigger secondary metabolism, and sometimes morphological differentiation in the Gram-positive genus Streptomyces through binding to a specific autoregulator receptor. This gene cluster showed close similarity to other regulatory islands of Streptomyces origin that are responsible for the control of secondary metabolism. The recombinant SscR protein expressed in Escherichia coli prefers a γ-butyrolactone autoregulator containing a long C-2 side chain and β-hydroxyl group at the C-6 position. An inactivation experiment confirmed that this γ-butyrolactone autoregulator receptor was involved in secondary metabolism but had no effects on the morphological differentiation. In the sscR-deleted mutant, the binding activity of the γ-butyrolactone autoregulator was completely abolished, suggesting that its primary role is to detect the presence of an autoregulator in the environment. HPLC analysis of the culture broth showed that some peaks disappeared and new peaks that were not present in the broth of the wild-type strain appeared. © 2008 Institute of Microbiology, v.v.i, Academy of Sciences of the Czech Republic.