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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Interaction of human AP endonuclease 1 with flap endonuclease 1 and proliferating cell nuclear antigen involved in long-patch base excision repair.

To understand the mechanism involved in the coordination of the sequential repair reactions that lead to long-patch BER, we have investigated interactions between proteins involved in this pathway. We find that human AP endonuclease 1 (APE1) physically interacts with flap endonuclease 1 (FEN1) and with proliferating cell nuclear antigen. An oligonucleotide substrate containing a reduced abasic site, which was pre-incised with APE1, was employed to reconstitute the excision step of long-patch BER with purified human DNA polymerase beta and FEN1. We demonstrate that addition of APE1 to the excision reaction mixture slightly (1.5-2-fold) stimulates the removal of the displaced flap by FEN1. These results suggest the possibility that long-patch BER is coordinated and directed by protein-protein interactions.[1]

References

  1. Interaction of human AP endonuclease 1 with flap endonuclease 1 and proliferating cell nuclear antigen involved in long-patch base excision repair. Dianova, I.I., Bohr, V.A., Dianov, G.L. Biochemistry (2001) [Pubmed]
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