Arginine Gene Cluster of Serratia marcescens

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  • MATSUMOTO Hideki
    Department of Bacteriology, Faculty of Medicine, Shinshu University Central Clinical Laboratories, Shinshu University Hospital
  • HOSOGAYA Shigemi
    Department of Bacteriology, Faculty of Medicine, Shinshu University Central Clinical Laboratories, Shinshu University Hospital
  • SUZUKI Kiyoshi
    Department of Bacteriology, Faculty of Medicine, Shinshu University Central Clinical Laboratories, Shinshu University Hospital
  • TAZAKI Tadakatu
    Department of Bacteriology, Faculty of Medicine, Shinshu University Central Clinical Laboratories, Shinshu University Hospital

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  • Arginine gene cluster of Serratia marce
  • Arginine Gene Cluster of <i>Serratia marcescens</i>

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Biochemical and genetic studies on the arginine-requiring auxotrophs derived from a Serratia marcescens strain were carried out. The arg mutants were classified into seven biochemical groups based on their growth response to five precursors of arginine biosynthesis and enzyme deficiency. Reciprocal transduction tests among those arg mutants divided them into three linkage groups, and the fine mapping in each of the groups by two- or three-point crosses revealed the following arrangement of loci. (1) arg44-thy11-lys1; (2) met1-glt2-argE-(arg19-arg51)-argl20-argG-argH; (3) arg33-pyr4. Five of the seven biochemically distinct arg mutants belonged to the second linkage group, and they constituted an arg-gene cluster. A characteristic feature of the arg-gene cluster of S. marcescens is that it involves argG, which was previously reported only in the Proteus group of Enterobacteriaceae.

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