Mechanism of microhomology-mediated end-joining promoted by human DNA polymerase θ.
Mechanism of microhomology-mediated end-joining promoted by human DNA polymerase θ.
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DOI:
10.1038/nsmb.2961
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发表时间:
2015-03
影响因子:
16.8
通讯作者:
Pomerantz, Richard T.
中科院分区:
文献类型:
--
作者:
Kent, Tatiana;Chandramouly, Gurushankar;McDevitt, Shane Michael;Ozdemir, Ahmet Y.;Pomerantz, Richard T.
Microhomology-mediated end-joining (MMEJ) is an error-prone alternative double-strand break repair pathway that utilizes sequence microhomology to recombine broken DNA. Although MMEJ is implicated in cancer development, the mechanism of this pathway is unknown. We demonstrate that purified human DNA polymerase θ (Polθ) performs MMEJ of DNA containing 3’ single-strand DNA overhangs with two or more base-pairs of homology, including DNA modeled after telomeres, and show that MMEJ is dependent on Polθ in human cells. Our data support a mechanism whereby Polθ facilitates end-joining and microhomology annealing then utilizes the opposing overhang as a template in trans which stabilizes the DNA synapse. Polθ exhibits a preference for DNA containing a 5’-terminal phosphate, similar to polymerases involved in non-homologous end-joining. Lastly, we identify a conserved loop domain that is essential for MMEJ and higher-order structures of Polθ which likely promote DNA synapse formation.
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DOI:
10.1016/j.tig.2008.08.007
发表时间:
2008-11
期刊:
Trends in genetics : TIG
影响因子:
--
作者:
McVey M;Lee SE
通讯作者:
Lee SE
影响因子:
4.8
作者:
Wang, Weina;Wu, Eugene Y.;Beese, Lorena S.
通讯作者:
Beese, Lorena S.
影响因子:
4.5
作者:
Simsek D;Brunet E;Wong SY;Katyal S;Gao Y;McKinnon PJ;Lou J;Zhang L;Li J;Rebar EJ;Gregory PD;Holmes MC;Jasin M
通讯作者:
Jasin M
影响因子:
14.9
作者:
Prasad R;Longley MJ;Sharief FS;Hou EW;Copeland WC;Wilson SH
通讯作者:
Wilson SH
影响因子:
8.8
作者:
Brissett NC;Martin MJ;Bartlett EJ;Bianchi J;Blanco L;Doherty AJ
通讯作者:
Doherty AJ