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Inducible expression of choline sulfatase and its regulator BetR in Pseudomonas sp. ATCC19151.

Authors :
Jovcic, Branko
Venturi, Vittorio
Topisirovic, Ljubisa
Kojic, Milan
Source :
Archives of Microbiology. Jun2011, Vol. 193 Issue 6, p399-405. 7p. 1 Black and White Photograph, 1 Diagram, 1 Chart, 3 Graphs.
Publication Year :
2011

Abstract

Pseudomonas sp. strain ATCC19151 is a natural isolate from sewage with the ability to degrade detergents. Genes encoding potential choline sulfatase ( betC), substrate-binding ABC transporter protein ( betD), sulfate transporter ( betE), and divergent putative transcriptional regulator ( betR) were cloned and characterized from strain ATCC19151. In silico analysis revealed that (1) the BetC protein belongs to alkPPc superfamily and shares CXPXR sequence with the cysteine sulfatases of group I, (2) BetR belongs to the LysR family of transcriptional regulators, (3) BetD is part of the PBPb superfamily of periplasmic and membrane-associated proteins, and (4) BetE is a permease and contains STAS domain. Insertional mutagenesis and genetic complementation show that betC gene encodes a functional choline sulfatase. Analysis of the betC (P) and betR (P) promoters revealed that they are inducible. BetR activates betC and betR transcription in the presence of choline sulfate, whilst in the absence of choline sulfate, BetR represses its own transcription. It was further established that BetR directly binds to betC- betR intergenic region in vitro, with higher affinity in the presence of choline sulfate as cofactor. Transcription of betC and betR was not induced in the presence of high concentration of NaCl. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
03028933
Volume :
193
Issue :
6
Database :
Academic Search Index
Journal :
Archives of Microbiology
Publication Type :
Academic Journal
Accession number :
60644135
Full Text :
https://doi.org/10.1007/s00203-011-0685-x