Polθ reverse transcribes RNA and promotes RNA-templated DNA repair.
Polθ reverse transcribes RNA and promotes RNA-templated DNA repair.
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DOI:
10.1126/sciadv.abf1771
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发表时间:
2021-06
期刊:
影响因子:
13.6
通讯作者:
Pomerantz RT
中科院分区:
文献类型:
--
作者:
Chandramouly G;Zhao J;McDevitt S;Rusanov T;Hoang T;Borisonnik N;Treddinick T;Lopezcolorado FW;Kent T;Siddique LA;Mallon J;Huhn J;Shoda Z;Kashkina E;Brambati A;Stark JM;Chen XS;Pomerantz RT
Polθ reverse transcribes RNA by undergoing a significant conformational change and promotes RNA-templated DNA repair. Genome-embedded ribonucleotides arrest replicative DNA polymerases (Pols) and cause DNA breaks. Whether mammalian DNA repair Pols efficiently use template ribonucleotides and promote RNA-templated DNA repair synthesis remains unknown. We find that human Polθ reverse transcribes RNA, similar to retroviral reverse transcriptases (RTs). Polθ exhibits a significantly higher velocity and fidelity of deoxyribonucleotide incorporation on RNA versus DNA. The 3.2-Å crystal structure of Polθ on a DNA/RNA primer-template with bound deoxyribonucleotide reveals that the enzyme undergoes a major structural transformation within the thumb subdomain to accommodate A-form DNA/RNA and forms multiple hydrogen bonds with template ribose 2′-hydroxyl groups like retroviral RTs. Last, we find that Polθ promotes RNA-templated DNA repair in mammalian cells. These findings suggest that Polθ was selected to accommodate template ribonucleotides during DNA repair.
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影响因子:
64.8
作者:
Mateos-Gomez PA;Gong F;Nair N;Miller KM;Lazzerini-Denchi E;Sfeir A
通讯作者:
Sfeir A
影响因子:
8.8
作者:
Chandramouly G;Liao S;Rusanov T;Borisonnik N;Calbert ML;Kent T;Sullivan-Reed K;Vekariya U;Kashkina E;Skorski T;Yan H;Pomerantz RT
通讯作者:
Pomerantz RT
影响因子:
16.8
作者:
Kent, Tatiana;Chandramouly, Gurushankar;McDevitt, Shane Michael;Ozdemir, Ahmet Y.;Pomerantz, Richard T.
通讯作者:
Pomerantz, Richard T.
影响因子:
4.8
作者:
Su, Yan;Egli, Martin;Guengerich, F. Peter
通讯作者:
Guengerich, F. Peter
DOI:
10.1073/pnas.89.15.6919
发表时间:
1992-08-01
影响因子:
11.1
作者:
BOYER, JC;BEBENEK, K;KUNKEL, TA
通讯作者:
KUNKEL, TA