Identification of a mutation within the structural gene for the a subunit of DNA-dependent RNA polymerase of E. coli.
An E. coli mutant rpoA109 unable to support the growth of phage P2 produces DNA-dependent RNA polymerase with an altered alpha subunit. Histidine is substituted for leucine in one tryptic peptide from the mutant alpha subunit. The existence of only one rpoA gene within the E. coli chromosome is indicated.
D000595:Amino Acid Sequence; D012321:DNA-Directed RNA Polymerases; D004926:Escherichia coli; D005796:Genes; D006639:Histidine; D007930:Leucine; D009154:Mutation
D006639:Histidine; D012321:DNA-Directed RNA Polymerases; D007930:Leucine