Abstract
The mutB gene of Salmonella typhimurium is involved in a methylation-independent repair pathway specific for A/G or A/C mismatches and is the homolog of the Escherichia coli mutY gene. The mutB gene of S. typhimurium was cloned and sequenced. The isolated mutB clone reduced the mutation rate of the mutB mutant to wild-type levels and also restored A/G mismatch-specific nicking activity, which is defective in mutB extracts. The amino acid sequence encoded by the mutB gene is 91% homologous to that encoded by the E. coli mutY gene.
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- Au K. G., Cabrera M., Miller J. H., Modrich P. Escherichia coli mutY gene product is required for specific A-G----C.G mismatch correction. Proc Natl Acad Sci U S A. 1988 Dec;85(23):9163–9166. doi: 10.1073/pnas.85.23.9163. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Au K. G., Clark S., Miller J. H., Modrich P. Escherichia coli mutY gene encodes an adenine glycosylase active on G-A mispairs. Proc Natl Acad Sci U S A. 1989 Nov;86(22):8877–8881. doi: 10.1073/pnas.86.22.8877. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Harley C. B., Reynolds R. P. Analysis of E. coli promoter sequences. Nucleic Acids Res. 1987 Mar 11;15(5):2343–2361. doi: 10.1093/nar/15.5.2343. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Lu A. L., Chang D. Y. A novel nucleotide excision repair for the conversion of an A/G mismatch to C/G base pair in E. coli. Cell. 1988 Sep 9;54(6):805–812. doi: 10.1016/s0092-8674(88)91109-9. [DOI] [PubMed] [Google Scholar]
- Lu A. L., Chang D. Y. Repair of single base-pair transversion mismatches of Escherichia coli in vitro: correction of certain A/G mismatches is independent of dam methylation and host mutHLS gene functions. Genetics. 1988 Apr;118(4):593–600. doi: 10.1093/genetics/118.4.593. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Lu A. L., Cuipa M. J., Ip M. S., Shanabruch W. G. Specific A/G-to-C.G mismatch repair in Salmonella typhimurium LT2 requires the mutB gene product. J Bacteriol. 1990 Mar;172(3):1232–1240. doi: 10.1128/jb.172.3.1232-1240.1990. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Michaels M. L., Cruz C., Grollman A. P., Miller J. H. Evidence that MutY and MutM combine to prevent mutations by an oxidatively damaged form of guanine in DNA. Proc Natl Acad Sci U S A. 1992 Aug 1;89(15):7022–7025. doi: 10.1073/pnas.89.15.7022. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Michaels M. L., Miller J. H. The GO system protects organisms from the mutagenic effect of the spontaneous lesion 8-hydroxyguanine (7,8-dihydro-8-oxoguanine). J Bacteriol. 1992 Oct;174(20):6321–6325. doi: 10.1128/jb.174.20.6321-6325.1992. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Michaels M. L., Pham L., Nghiem Y., Cruz C., Miller J. H. MutY, an adenine glycosylase active on G-A mispairs, has homology to endonuclease III. Nucleic Acids Res. 1990 Jul 11;18(13):3841–3845. doi: 10.1093/nar/18.13.3841. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Nghiem Y., Cabrera M., Cupples C. G., Miller J. H. The mutY gene: a mutator locus in Escherichia coli that generates G.C----T.A transversions. Proc Natl Acad Sci U S A. 1988 Apr;85(8):2709–2713. doi: 10.1073/pnas.85.8.2709. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Radicella J. P., Clark E. A., Fox M. S. Some mismatch repair activities in Escherichia coli. Proc Natl Acad Sci U S A. 1988 Dec;85(24):9674–9678. doi: 10.1073/pnas.85.24.9674. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Sanger F., Nicklen S., Coulson A. R. DNA sequencing with chain-terminating inhibitors. Proc Natl Acad Sci U S A. 1977 Dec;74(12):5463–5467. doi: 10.1073/pnas.74.12.5463. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Shanabruch W. G., Behlau I., Walker G. C. Spontaneous mutators of salmonella typhimurium LT2 generated by insertion of transposable elements. J Bacteriol. 1981 Sep;147(3):827–835. doi: 10.1128/jb.147.3.827-835.1981. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Su S. S., Lahue R. S., Au K. G., Modrich P. Mispair specificity of methyl-directed DNA mismatch correction in vitro. J Biol Chem. 1988 May 15;263(14):6829–6835. [PubMed] [Google Scholar]
- Tsai-Wu J. J., Liu H. F., Lu A. L. Escherichia coli MutY protein has both N-glycosylase and apurinic/apyrimidinic endonuclease activities on A.C and A.G mispairs. Proc Natl Acad Sci U S A. 1992 Sep 15;89(18):8779–8783. doi: 10.1073/pnas.89.18.8779. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Tsai-Wu J. J., Radicella J. P., Lu A. L. Nucleotide sequence of the Escherichia coli micA gene required for A/G-specific mismatch repair: identity of micA and mutY. J Bacteriol. 1991 Mar;173(6):1902–1910. doi: 10.1128/jb.173.6.1902-1910.1991. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Watanabe M., Nohmi T., Ishidate M., Jr New tester strains of Salmonella typhimurium highly sensitive to mutagenic nitroarenes. Biochem Biophys Res Commun. 1987 Sep 30;147(3):974–979. doi: 10.1016/s0006-291x(87)80165-1. [DOI] [PubMed] [Google Scholar]