Kinetics of branch migration in double-stranded DNA - PubMed (original) (raw)

Kinetics of branch migration in double-stranded DNA

B J Thompson et al. Proc Natl Acad Sci U S A. 1976 Jul.

Abstract

The rate of branch migration in double stranded DNA has been measured by the use of a unique substrate formed by the action of the EcoRI restriction endonuclease on the dimeric figure-8 configuration of the replicative form DNA of phage G4. The figure-8 and the X-form derived from it contain a junction of the kind postulated to occur in the Holliday structure and to be an essential feature of a number of models of recombination. In the X-form this junction can branch migrate to an irreversible terminal configuration consisting of two linear monomers. The disappearance of X-forms was measured by electron microscopy. A treatment of branch migration as a random walk process was developed to permit the determination of the rate of the intrinsic process, a step movement of the junction by a distance of one base pair. A value of about 6 kilobase pairs per sec at 37 degrees was obtained.

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References

    1. Annu Rev Microbiol. 1974;28(0):445-68 - PubMed
    1. Annu Rev Genet. 1973;7:87-111 - PubMed
    1. Nat New Biol. 1973 Mar 7;242(114):9-12 - PubMed
    1. Adv Genet. 1973;17:411-90 - PubMed
    1. J Mol Biol. 1973 Nov 25;81(1):1-16 - PubMed

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