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Genetic requirements for conjugational recombination in the presence of lambda Gam protein in Escherichia coli

Ivančić-Baće, Ivana; Škrobot Vidaček, Nikolina; Zahradka, Davor; Salaj-Šmic, Erika; Brčić-Kostić, Krunoslav (2002) Genetic requirements for conjugational recombination in the presence of lambda Gam protein in Escherichia coli. Food Technology and Biotechnology, 40 (4). pp. 261-265. ISSN 1330-9862

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The Gam protein of phage λ is a well-known inhibitor of the enzymatic activities of the RecBCD enzyme, the major enzyme involved in homologous recombination in bacteria Escherichia coli. In this work, we studied (i) the effect of the RecA loading-deficient recB (recBD1080A) mutation on conjugational recombination in the presence of λ phage Gam protein and (ii) additional genetic requirements for the RecBCD Gam-mediated conjugational recombination. For this purpose, we introduced Gam+ and Gam– expressing plasmids into wild type cells and different mutants of E. coli (recJ, recBD1080A, recB, recN, recF, recR, recO, recD), and determined the yields of recombinants after Hfr mediated conjugation. The obtained results suggest that RecA loading activity is not inhibited by Gam and that conjugational recombination in the presence of Gam is partially dependent on recJ and recO gene products.

Item Type: Article
Uncontrolled Keywords: Escherichia coli; phage lambda; conjugational recombination; RecBCD enzyme; Gam protein
Subjects: NATURAL SCIENCES > Biology
Divisions: Division of Molecular Biology
Project titleProject leaderProject codeProject type
Raznolikost , struktura i evolucija genoma viših biljaka i nekih životinjaDražena Papeš0119112UNSPECIFIED
Regulacija rekombinacije i rekombinacijskog Mirjana Petranović0098071UNSPECIFIED
Uloga rekombinacije u popravku DNA i stabilnosti genomaErika Salaj-Šmic0098070UNSPECIFIED
Depositing User: Sofija Konjević
Date Deposited: 11 Apr 2016 13:22

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