Orientation of cohesive end site cos determines the active orientation of chi sequence in stimulating recA . recBC-mediated recombination in phage lambda lytic infections - PubMed (original) (raw)
Orientation of cohesive end site cos determines the active orientation of chi sequence in stimulating recA . recBC-mediated recombination in phage lambda lytic infections
I Kobayashi et al. Proc Natl Acad Sci U S A. 1982 Oct.
Abstract
Sequence chi, 5'G-C-T-G-G-T-G-G, locally enhances homologous recombination by recA and recBC proteins of Escherichia coli. Previous work showed that, in phage lambda, chi is more active in one orientation (leftward) than in the other (rightward). Inverting cos, the sequence for the mature DNA ends of lambda, reverses this orientation dependence: the rightward chi becomes fully active, and the leftward chi becomes relatively inactive. We surmise that chi action in phage lambda is coupled with DNA packaging or injection.
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