A response regulator‐like protein that functions at an intermediate stage of sporulation in Streptomyces coelicolor A3(2)

whiI is one of several loci originally described as essential for sporulation in Streptomyces coelicolor A3(2). We have characterized whiI at the molecular level. It encodes an atypical member of the response regulator family of proteins, lacking at least two of the residues strongly conserved in th...

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Veröffentlicht in:Molecular microbiology 1999-11, Vol.34 (3), p.607-619
Hauptverfasser: Aínsa, José A., Parry, Huw D., Chater, Keith F.
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container_title Molecular microbiology
container_volume 34
creator Aínsa, José A.
Parry, Huw D.
Chater, Keith F.
description whiI is one of several loci originally described as essential for sporulation in Streptomyces coelicolor A3(2). We have characterized whiI at the molecular level. It encodes an atypical member of the response regulator family of proteins, lacking at least two of the residues strongly conserved in the conventional phosphorylation pocket. It is not adjacent to a potential sensor kinase gene. Fifteen mutant alleles of whiI were sequenced, revealing, among others, six mutations affecting conserved amino acids, several frameshift mutations and one mutation in the promoter. The whiI promoter is specifically transcribed by the sporulation‐specific σWhiG‐containing form of RNA polymerase. Transcription of whiI is temporally controlled, reaching a maximum level coincident with the formation of spores. Further transcriptional studies suggested that WhiI is involved directly or indirectly in repressing its own expression and that of another σWhiG‐dependent sporulation‐specific regulatory gene, whiH.
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We have characterized whiI at the molecular level. It encodes an atypical member of the response regulator family of proteins, lacking at least two of the residues strongly conserved in the conventional phosphorylation pocket. It is not adjacent to a potential sensor kinase gene. Fifteen mutant alleles of whiI were sequenced, revealing, among others, six mutations affecting conserved amino acids, several frameshift mutations and one mutation in the promoter. The whiI promoter is specifically transcribed by the sporulation‐specific σWhiG‐containing form of RNA polymerase. Transcription of whiI is temporally controlled, reaching a maximum level coincident with the formation of spores. Further transcriptional studies suggested that WhiI is involved directly or indirectly in repressing its own expression and that of another σWhiG‐dependent sporulation‐specific regulatory gene, whiH.</abstract><cop>Oxford BSL</cop><pub>Blackwell Science Ltd</pub><pmid>10564501</pmid><doi>10.1046/j.1365-2958.1999.01630.x</doi><tpages>13</tpages><oa>free_for_read</oa></addata></record>
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subjects Amino Acid Sequence
Bacterial Proteins
Base Sequence
Cloning, Molecular
frameshift mutant
Gene Expression Regulation, Bacterial
Genes, Bacterial
Genetic Complementation Test
Molecular Sequence Data
Mutation
Promoter Regions, Genetic
Repressor Proteins - chemistry
Repressor Proteins - genetics
Repressor Proteins - metabolism
Repressor Proteins - physiology
Sequence Alignment
Sequence Analysis, DNA
Spores, Bacterial - genetics
Spores, Bacterial - physiology
Streptomyces - genetics
Streptomyces - physiology
Streptomyces coelicolor
Whil gene
title A response regulator‐like protein that functions at an intermediate stage of sporulation in Streptomyces coelicolor A3(2)
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