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J. Biol. Chem., Vol. 280, Issue 32, 28852-28857, August 12, 2005
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From the
Laboratoire de Chimie Bactérienne, Institut de Biologie Structurale et Microbiologie, CNRS, 31 Chemin Joseph Aiguier, 13402 Marseille Cedex 20 and ¶Laboratoire des Enveloppes Bactériennes et Antibiotiques, Institut de Biochimie et Biophysique Moléculaire et Cellulaire, UMR 8619 CNRS, Université Paris-Sud, B
timent 430, 91405 Orsay Cedex, France
Overexpression of the BcrCBs protein, formerly called YwoA, in Escherichia coli or in Bacillus subtilis allows these bacteria to stand higher concentrations of bacitracin. It was suggested that BcrCBs was a membrane-spanning domain of an ATP binding cassette (ABC) transporter involved in bacitracin resistance. However, we hypothesized that this protein has an undecaprenyl pyrophosphate (UPP) phosphatase activity able to compete with bacitracin for UPP. We found that overexpression of a recombinant His6-BcrCBs protein in E. coli (i) increased the resistance of the cells to bacitracin and (ii) increased UPP phosphatase activity in membrane preparations by 600-fold. We solubilized and prepared an electrophoretically pure protein exhibiting a strong UPP phosphatase activity. BcrCBs, which belongs to the type 2 phosphatidic acid phosphatase (PAP2) phosphatase superfamily (PF01569), differs totally from the already known BacA UPP phosphatase from E. coli, a member of the PF02673 family of the Protein family (Pfam) database. Thus, BcrCBs and its orthologs form a new class of proteins within the PAP2 phosphatase superfamily, and likely all of them share a UPP phosphatase activity.
Received for publication, December 7, 2004 , and in revised form, May 31, 2005.
* This work was supported by grants from the Centre National de la Recherche Scientifique (to D. M.-L. and F. D.) and by grants from the European Community (Grant FP6, LSHM-CT-2003-503335, "COBRA" project) (to D. M.-L.) and from Hoechst Marion Roussel (Grant FRHMR2/9932) (to F. D.). The costs of publication of this article were defrayed in part by the payment of page charges. This article must therefore be hereby marked "advertisement" in accordance with 18 U.S.C. Section 1734 solely to indicate this fact.
Recipients of a scholarship from the Ministère de l'Education Nationale, de la Recherche et de la Technologie.
|| To whom correspondence should be addressed. Tel.: 33-4-91164387; Fax: 33-4-91718914; E-mail: denizot{at}ibsm.cnrs-mrs.fr.
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