High-level expression of the cloned ada gene of Escherichia coli by deletion of its regulatory sequence

Keizo Tano, Robert S. Foote, Sankar Mitra

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

The Ada protein, a methyltransferase for repair of several alkyl adducts in DNA, was expressed in its native form at a high level in Escherichia coli from a pUC9 recombinant plasmid carrying ada gene from which the sequence controlling the Ada induction was deleted. The regulatory sequence appears to act as a terminator of transcription initiated from the lac promoter of the vector. However, deletion of the regulatory sequence resulted in elimination of ada induction by alkylating agents, providing confirmation of its role in activation of ada expression.

Original languageEnglish (US)
Pages (from-to)305-311
Number of pages7
JournalGene
Volume64
Issue number2
DOIs
StatePublished - Apr 29 1988

Keywords

  • adaptive response
  • DNA repair
  • O-methylguanine-DNA methyltransferase
  • Recombinant DNA
  • regulon
  • site-directed mutagenesis
  • terminator

ASJC Scopus subject areas

  • Genetics

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