Genetic recombination in Escherichia coli

Holliday junctions made by RecA protein are resolved by fractionated cell-free extracts

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

Escherichia coli RecA protein catalyzes reciprocal strand-exchange reactions between duplex DNA molecules, provided that one contains a single-stranded gap or tail, to form recombination intermediates containing Holliday junctions. Recombination reactions are thought to occur within helical RecA-nucleoprotein filaments in which DNA molecules are interwound. Structures generated in vitro by RecA protein have been used to detect an activity from fractionated E. coli extracts that resolves the intermediates into heteroduplex recombinant products. Resolution occurs by specific endonucleolytic cleavage at the Holliday junction. The products of cleavage are characteristic of patch and splice recombinants.
Original languageEnglish
Pages (from-to)8476-8480
Number of pages5
JournalPNAS
Volume87
Issue number21
DOIs
Publication statusPublished - 1 Nov 1990

Fingerprint

Cruciform DNA
Rec A Recombinases
Cell Extracts
Genetic Recombination
Escherichia coli
Nucleoproteins
Escherichia coli Proteins
DNA

Keywords

  • Adenosine Triphosphate
  • Bacteriophage phi X 174
  • DNA, Circular
  • DNA, Single-Stranded
  • DNA, Viral
  • Escherichia coli
  • Rec A Recombinases
  • Recombination, Genetic

Cite this

Genetic recombination in Escherichia coli : Holliday junctions made by RecA protein are resolved by fractionated cell-free extracts. / Connolly, Bernadette; West, S C.

In: PNAS, Vol. 87, No. 21, 01.11.1990, p. 8476-8480.

Research output: Contribution to journalArticle

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abstract = "Escherichia coli RecA protein catalyzes reciprocal strand-exchange reactions between duplex DNA molecules, provided that one contains a single-stranded gap or tail, to form recombination intermediates containing Holliday junctions. Recombination reactions are thought to occur within helical RecA-nucleoprotein filaments in which DNA molecules are interwound. Structures generated in vitro by RecA protein have been used to detect an activity from fractionated E. coli extracts that resolves the intermediates into heteroduplex recombinant products. Resolution occurs by specific endonucleolytic cleavage at the Holliday junction. The products of cleavage are characteristic of patch and splice recombinants.",
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KW - Rec A Recombinases

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