Phenotypic reversal in dam mutants of Escherichia coli K-12 by a recombinant plasmid containing the dam+ gene

J Bacteriol. 1983 Jan;153(1):562-5. doi: 10.1128/jb.153.1.562-565.1983.

Abstract

A recombinant plasmid, pMQ3, carrying the dam gene of Escherichia coli K-12, was constructed and transformed into dam+ and dam- strains. Both dam- and dam+ strains containing pMQ3 showed a wild phenotype for all traits, including mutation rate, except for a 10-fold increase in DNA adenine methylase activity.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Cloning, Molecular
  • DNA (Cytosine-5-)-Methyltransferases / genetics*
  • DNA, Recombinant
  • Escherichia coli / enzymology
  • Escherichia coli / genetics*
  • Genes, Bacterial*
  • Methyltransferases / genetics*
  • Mutation
  • Phenotype
  • Plasmids
  • Site-Specific DNA-Methyltransferase (Adenine-Specific)
  • Transformation, Bacterial*

Substances

  • DNA, Recombinant
  • Methyltransferases
  • DNA (Cytosine-5-)-Methyltransferases
  • Site-Specific DNA-Methyltransferase (Adenine-Specific)