Reference: Cağlayan M, et al. (2014) Role of polymerase β in complementing aprataxin deficiency during abasic-site base excision repair. Nat Struct Mol Biol 21(5):497-9

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Abstract


DNA polymerase β (pol β) lyase removal of 5'-deoxyribose phosphate (5'-dRP) from base excision repair (BER) intermediates is critical in mammalian BER involving the abasic site. We found that pol β also removes 5'-adenylated dRP from BER intermediates after abortive ligation. The crystal structure of a human pol β-DNA complex showed the 5'-AMP-dRP group positioned in the lyase active site. Pol β expression rescued methyl methanesulfonate sensitivity in aprataxin (hnt3)- and FEN1 (rad27)-deficient yeast.

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Journal Article | Research Support, N.I.H., Intramural
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Cağlayan M, Batra VK, Sassa A, Prasad R, Wilson SH
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