Reconstituting the Key Steps of the DNA Double-Strand Break Repair In Vitro

  • Matthew J. Rossi
  • Dmitry V. Bugreev
  • Olga M. Mazina
  • Alexander V. MazinEmail author
Part of the Methods in Molecular Biology book series (MIMB, volume 745)


Double-stranded DNA breaks (DSB), the most harmful type of DNA lesions, cause cell death and genome instability. Homologous recombination repairs DSB using homologous DNA sequences as templates. Here we describe a set of reactions that lead to reconstitution of the double-stranded DNA break repair process in vitro employing purified human homologous recombination proteins and DNA polymerase η. Reconstitution of critical steps of DSB repair in vitro may help to better understand the mechanisms of recombinational DNA repair and the role of various human homologous recombination proteins in this process.

Key words

Homologous recombination DNA strand exchange branch migration Holliday junction joint molecules D-loops 



This work was supported by the NIH Grant CA100839, MH084119, and the Leukemia and Lymphoma Society Scholar Award 1054-09 (to AVM) and NIH Grant F31 AG033484-01 (to MJR).


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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Matthew J. Rossi
    • 1
  • Dmitry V. Bugreev
    • 1
  • Olga M. Mazina
    • 1
  • Alexander V. Mazin
    • 1
    Email author
  1. 1.Department of Biochemistry and Molecular BiologyDrexel University College of MedicinePhiladelphiaUSA

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