Abstract
The Escherichia coli gene murZ was recently shown to encode UDP-N-acetylglucosamine enolpyruvyl transferase, which catalyzes the first committed step of peptidoglycan biosynthesis (J. L. Marquardt, D. A. Siegele, R. Kolter, and C. T. Walsh, J. Bacteriol. 174:5748-5752, 1992). The map position of murZ (69.3 min) differed from that determined for murA (90 min), a gene which had been previously proposed to encode the same activity (P.S. Venkateswaran and H. C. Wu, J. Bacteriol. 110:935-944, 1972). Here we describe the construction of a chromosomal deletion of murZ and a plasmid containing murZ under arabinose control. Growth of cells containing the murZ deletion was dependent on the expression of murZ from the plasmid. We conclude that murZ is an essential gene and encodes the sole UDP-N-acetylglucosamine enolpyruvyl transferase of E. coli. To simplify the nomenclature, we recommend that murA be used to designate the gene at 69.3 min that encodes this activity and that the designation murZ be abandoned.
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Selected References
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- Blomfield I. C., Vaughn V., Rest R. F., Eisenstein B. I. Allelic exchange in Escherichia coli using the Bacillus subtilis sacB gene and a temperature-sensitive pSC101 replicon. Mol Microbiol. 1991 Jun;5(6):1447–1457. doi: 10.1111/j.1365-2958.1991.tb00791.x. [DOI] [PubMed] [Google Scholar]
- Brown E. D., Marquardt J. L., Lee J. P., Walsh C. T., Anderson K. S. Detection and characterization of a phospholactoyl-enzyme adduct in the reaction catalyzed by UDP-N-acetylglucosamine enolpyruvoyl transferase, MurZ. Biochemistry. 1994 Sep 6;33(35):10638–10645. doi: 10.1021/bi00201a010. [DOI] [PubMed] [Google Scholar]
- Connell N., Han Z., Moreno F., Kolter R. An E. coli promoter induced by the cessation of growth. Mol Microbiol. 1987 Sep;1(2):195–201. doi: 10.1111/j.1365-2958.1987.tb00512.x. [DOI] [PubMed] [Google Scholar]
- Guzman L. M., Belin D., Carson M. J., Beckwith J. Tight regulation, modulation, and high-level expression by vectors containing the arabinose PBAD promoter. J Bacteriol. 1995 Jul;177(14):4121–4130. doi: 10.1128/jb.177.14.4121-4130.1995. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Hamilton C. M., Aldea M., Washburn B. K., Babitzke P., Kushner S. R. New method for generating deletions and gene replacements in Escherichia coli. J Bacteriol. 1989 Sep;171(9):4617–4622. doi: 10.1128/jb.171.9.4617-4622.1989. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Kahan F. M., Kahan J. S., Cassidy P. J., Kropp H. The mechanism of action of fosfomycin (phosphonomycin). Ann N Y Acad Sci. 1974 May 10;235(0):364–386. doi: 10.1111/j.1749-6632.1974.tb43277.x. [DOI] [PubMed] [Google Scholar]
- Marquardt J. L., Siegele D. A., Kolter R., Walsh C. T. Cloning and sequencing of Escherichia coli murZ and purification of its product, a UDP-N-acetylglucosamine enolpyruvyl transferase. J Bacteriol. 1992 Sep;174(17):5748–5752. doi: 10.1128/jb.174.17.5748-5752.1992. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Venkateswaran P. S., Wu H. C. Isolation and characterization of a phosphonomycin-resistant mutant of Escherichia coli K-12. J Bacteriol. 1972 Jun;110(3):935–944. doi: 10.1128/jb.110.3.935-944.1972. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Way J. C., Davis M. A., Morisato D., Roberts D. E., Kleckner N. New Tn10 derivatives for transposon mutagenesis and for construction of lacZ operon fusions by transposition. Gene. 1984 Dec;32(3):369–379. doi: 10.1016/0378-1119(84)90012-x. [DOI] [PubMed] [Google Scholar]
- Wu H. C., Venkateswaran P. S. Fosfomycin-resistant mutant of Escherichia coli. Ann N Y Acad Sci. 1974 May 10;235(0):587–592. doi: 10.1111/j.1749-6632.1974.tb43292.x. [DOI] [PubMed] [Google Scholar]