Hierarchical control on polyene macrolide biosynthesis: PimR modulates pimaricin production via the PAS-LuxR transcriptional activator PimM.

Control of polyene macrolide production in Streptomyces natalensis is mediated by the transcriptional activator PimR. This regulator combines an N-terminal domain corresponding to the Streptomyces antibiotic regulatory protein (SARP) family of transcriptional activators with a C-terminal half homolo...

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Autores principales:	Javier Santos-Aberturas, Cláudia M Vicente, Tamara D Payero, Lara Martín-Sánchez, Carmen Cañibano, Juan F Martín, Jesús F Aparicio
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2012
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d6846085a137452284e13b06761630f0
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spelling	oai:doaj.org-article:d6846085a137452284e13b06761630f02021-11-18T07:16:17ZHierarchical control on polyene macrolide biosynthesis: PimR modulates pimaricin production via the PAS-LuxR transcriptional activator PimM.1932-620310.1371/journal.pone.0038536https://doaj.org/article/d6846085a137452284e13b06761630f02012-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22693644/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203Control of polyene macrolide production in Streptomyces natalensis is mediated by the transcriptional activator PimR. This regulator combines an N-terminal domain corresponding to the Streptomyces antibiotic regulatory protein (SARP) family of transcriptional activators with a C-terminal half homologous to guanylate cyclases and large ATP-binding regulators of the LuxR family. The PimR SARP domain (PimR(SARP)) was expressed in Escherichia coli as a glutathione S-transferase (GST)-fused protein. Electrophoretic mobility shift assays showed that GST-PimR(SARP) binds a single target, the intergenic region between the regulatory genes pimR and pimMs in the pimaricin cluster. The PimR(SARP)-binding site was investigated by DNaseI protection studies, revealing that it contains three heptameric direct repeats adjusting to the consensus 5'-CGGCAAG-3'. Transcription start points of pimM and pimR promoters were identified by 5'-RACE, revealing that unlike other SARPs, PimR(SARP) does not interact with the -35 region of its target promoter. Quantitative transcriptional analysis of these regulatory genes on mutants on each of them has allowed the identification of the pimM promoter as the transcriptional target for PimR. Furthermore, the constitutive expression of pimM restored pimaricin production in a pimaricin-deficient strain carrying a deletion mutant of pimR. These results reveal that PimR exerts its positive effect on pimaricin production by controlling pimM expression level, a regulator whose gene product activates transcription from eight different promoters of pimaricin structural genes directly.Javier Santos-AberturasCláudia M VicenteTamara D PayeroLara Martín-SánchezCarmen CañibanoJuan F MartínJesús F AparicioPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 7, Iss 6, p e38536 (2012)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Javier Santos-Aberturas Cláudia M Vicente Tamara D Payero Lara Martín-Sánchez Carmen Cañibano Juan F Martín Jesús F Aparicio Hierarchical control on polyene macrolide biosynthesis: PimR modulates pimaricin production via the PAS-LuxR transcriptional activator PimM.
description	Control of polyene macrolide production in Streptomyces natalensis is mediated by the transcriptional activator PimR. This regulator combines an N-terminal domain corresponding to the Streptomyces antibiotic regulatory protein (SARP) family of transcriptional activators with a C-terminal half homologous to guanylate cyclases and large ATP-binding regulators of the LuxR family. The PimR SARP domain (PimR(SARP)) was expressed in Escherichia coli as a glutathione S-transferase (GST)-fused protein. Electrophoretic mobility shift assays showed that GST-PimR(SARP) binds a single target, the intergenic region between the regulatory genes pimR and pimMs in the pimaricin cluster. The PimR(SARP)-binding site was investigated by DNaseI protection studies, revealing that it contains three heptameric direct repeats adjusting to the consensus 5'-CGGCAAG-3'. Transcription start points of pimM and pimR promoters were identified by 5'-RACE, revealing that unlike other SARPs, PimR(SARP) does not interact with the -35 region of its target promoter. Quantitative transcriptional analysis of these regulatory genes on mutants on each of them has allowed the identification of the pimM promoter as the transcriptional target for PimR. Furthermore, the constitutive expression of pimM restored pimaricin production in a pimaricin-deficient strain carrying a deletion mutant of pimR. These results reveal that PimR exerts its positive effect on pimaricin production by controlling pimM expression level, a regulator whose gene product activates transcription from eight different promoters of pimaricin structural genes directly.
format	article
author	Javier Santos-Aberturas Cláudia M Vicente Tamara D Payero Lara Martín-Sánchez Carmen Cañibano Juan F Martín Jesús F Aparicio
author_facet	Javier Santos-Aberturas Cláudia M Vicente Tamara D Payero Lara Martín-Sánchez Carmen Cañibano Juan F Martín Jesús F Aparicio
author_sort	Javier Santos-Aberturas
title	Hierarchical control on polyene macrolide biosynthesis: PimR modulates pimaricin production via the PAS-LuxR transcriptional activator PimM.
title_short	Hierarchical control on polyene macrolide biosynthesis: PimR modulates pimaricin production via the PAS-LuxR transcriptional activator PimM.
title_full	Hierarchical control on polyene macrolide biosynthesis: PimR modulates pimaricin production via the PAS-LuxR transcriptional activator PimM.
title_fullStr	Hierarchical control on polyene macrolide biosynthesis: PimR modulates pimaricin production via the PAS-LuxR transcriptional activator PimM.
title_full_unstemmed	Hierarchical control on polyene macrolide biosynthesis: PimR modulates pimaricin production via the PAS-LuxR transcriptional activator PimM.
title_sort	hierarchical control on polyene macrolide biosynthesis: pimr modulates pimaricin production via the pas-luxr transcriptional activator pimm.
publisher	Public Library of Science (PLoS)
publishDate	2012
url	https://doaj.org/article/d6846085a137452284e13b06761630f0
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Hierarchical control on polyene macrolide biosynthesis: PimR modulates pimaricin production via the PAS-LuxR transcriptional activator PimM.

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