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  • Book
    Uma Lakshmipathy, Chad C. MacArthur, Mahalakshmi Sridharan, Rene H. Quintanilla.
    Digital Access Wiley 2018
  • Article
    Hafner EW, Tabor CW, Tabor H.
    J Bacteriol. 1977 Dec;132(3):832-40.
    An Escherichia coli metK mutant, designated metK110, was isolated among spontaneous ethionine-resistant organisms selected at 42 degrees C. The S-adenosylmethionine synthetase activity of this mutant was present at lower levels than in the corresponding wild-type strain and was more labile than the wild-type enzyme when heated or dialyzed. A mixture of mutant and wild-type enzyme preparations had an activity equal to the sum of the component activities. These facts strongly suggest that the mutated gene in this strain is the structural gene for this enzyme. Genetic mapping experiments placed the metK110 mutation near or at the site of other known metK mutants (i.e., 63 min), confirming its designation as a metK mutant. A revised gene order has been established for this region, i.e., metC glc speC metK speB serA.
    Digital Access Access Options