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. 1980 Mar;141(3):1258–1263. doi: 10.1128/jb.141.3.1258-1263.1980

Salmonella typhimurium mutants defective in acetohydroxy acid synthases I and II.

K J Shaw, C M Berg, T J Sobol
PMCID: PMC293821  PMID: 6245063

Abstract

An analysis of transposon-induced mutants shows that Salmonella typhimurium possesses two major isozymes of acetohydroxy acid synthase, the enzymes which mediate the first common step in isoleucine and valine biosynthesis. A third (minor) acetohydroxy acid synthase is present, but its significance in isoleucine and valine synthesis may be negligible. Mutants defective in acetohydroxy acid synthase II (ilvG::Tn10) require isoleucine, alpha-ketobutyrate, or threonine for growth, a mutant defective in acetohydroxy acid synthase I (ilvB::Tn5) is a prototroph, and a double mutant (ilvG::Tn10 ilvB::Tn5) requires isoleucine plus valine for growth.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. Armstrong F. B., Ishiwa H. Isoleucine-valine requiring mutants of Salmonella typhimurium. 3. Valine-sensitive strains. Genetics. 1971 Feb;67(2):171–182. doi: 10.1093/genetics/67.2.171. [DOI] [PMC free article] [PubMed] [Google Scholar]
  2. Baez M., Patin D. W., Calhoun D. H. Deletion mapping of the ilvGOEDAC genes of Escherichia coli K-12. Mol Gen Genet. 1979 Feb 1;169(3):289–297. doi: 10.1007/BF00382275. [DOI] [PubMed] [Google Scholar]
  3. Berg C. M., Shaw K. J., Vender J., Borucka-Mankiewicz M. Physiological characterization of polar Tn5-induced isoleucine-valine auxotrophs in Escherichia coli K.12: evidence for an internal promoter in the ilvOGEDA operon. Genetics. 1979 Oct;93(2):308–319. [PMC free article] [PubMed] [Google Scholar]
  4. Blatt J. M., Pledger W. J., Umbarger H. E. Isoleucine and valine metabolism in Escherichia coli. XX. Multiple forms of acetohydroxy acid synthetase. Biochem Biophys Res Commun. 1972 Jul 25;48(2):444–450. doi: 10.1016/s0006-291x(72)80071-8. [DOI] [PubMed] [Google Scholar]
  5. Cohen B. M., Jones E. W. New Map Location of ilvO in ESCHERICHIA COLI. Genetics. 1976 Jun;83(2):201–225. doi: 10.1093/genetics/83.2.201. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. De Felice M., Guardiola J., Esposito B., Iaccarino M. Structural genes for a newly recognized acetolactate synthase in Escherichia coli K-12. J Bacteriol. 1974 Dec;120(3):1068–1077. doi: 10.1128/jb.120.3.1068-1077.1974. [DOI] [PMC free article] [PubMed] [Google Scholar]
  7. De Felice M., Levinthal M., Iaccarino M., Guardiola J. Growth inhibition as a consequence of antagonism between related amino acids: effect of valine in Escherichia coli K-12. Microbiol Rev. 1979 Mar;43(1):42–58. doi: 10.1128/mr.43.1.42-58.1979. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Favre R., Wiater A., Puppo S., Iaccarino M. Expression of a valine-resistant acetolactate synthase activity mediated by the ilv O and ilv G genes of Escherichia coli K-12. Mol Gen Genet. 1976 Feb 2;143(3):243–252. doi: 10.1007/BF00269400. [DOI] [PubMed] [Google Scholar]
  9. Guardiola J., De Felice M., Iaccarino M. Mutant of Escherichia coli K-12 missing acetolactate synthase activity. J Bacteriol. 1974 Oct;120(1):536–538. doi: 10.1128/jb.120.1.536-538.1974. [DOI] [PMC free article] [PubMed] [Google Scholar]
  10. Kleckner N., Roth J., Botstein D. Genetic engineering in vivo using translocatable drug-resistance elements. New methods in bacterial genetics. J Mol Biol. 1977 Oct 15;116(1):125–159. doi: 10.1016/0022-2836(77)90123-1. [DOI] [PubMed] [Google Scholar]
  11. O'Neill J. P., Freundlich M. Temperature-sensitive growth inhibition by valine in Salmonella typhimurium: alteration of one form of acetohydroxy acid synthetase. J Bacteriol. 1973 Oct;116(1):98–106. doi: 10.1128/jb.116.1.98-106.1973. [DOI] [PMC free article] [PubMed] [Google Scholar]
  12. O'Neill J. P., Freundlich M. Two forms of biosynthetic acetohydroxy acid synthetase in Salmonella typhimurium. Biochem Biophys Res Commun. 1972 Jul 25;48(2):437–443. doi: 10.1016/s0006-291x(72)80070-6. [DOI] [PubMed] [Google Scholar]
  13. RAMAKRISHNAN T., ADELBERG E. A. REGULATORY MECHANISMS IN THE BIOSYNTHESIS OF ISOLEUCINE AND VALINE. 3. MAP ORDER OF THE STRUCTURAL GENES AND OPERATOR GENES. J Bacteriol. 1965 Mar;89:661–664. doi: 10.1128/jb.89.3.661-664.1965. [DOI] [PMC free article] [PubMed] [Google Scholar]
  14. Smith J. M., Smith F. J., Umbarger H. E. Mutations affecting the formation of acetohydroxy acid synthase II in Escherichia coli K-12. Mol Gen Genet. 1979 Feb 1;169(3):299–314. doi: 10.1007/BF00382276. [DOI] [PubMed] [Google Scholar]
  15. Smith J. M., Smolin D. E., Umbarger H. E. Polarity and the regulation of the ilv gene cluster in Escherichia coli strain K-12. Mol Gen Genet. 1976 Oct 18;148(2):111–124. doi: 10.1007/BF00268374. [DOI] [PubMed] [Google Scholar]

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