Ultraviolet-induced RNA:DNA hybrids interfere with chromosomal DNA synthesis.
Ultraviolet-induced RNA:DNA hybrids interfere with chromosomal DNA synthesis.
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DOI:
10.1093/nar/gkab147
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发表时间:
2021-04-19
影响因子:
14.9
通讯作者:
Kuzminov A
中科院分区:
文献类型:
--
作者:
Kouzminova EA;Kuzminov A
Ultraviolet (UV) induces pyrimidine dimers (PDs) in DNA and replication-dependent fragmentation in chromosomes. The rnhAB mutants in Escherichia coli, accumulating R-loops and single DNA-rNs, are generally resistant to DNA damage, but are surprisingly UV-sensitive, even though they remove PDs normally, suggesting irreparable chromosome lesions. We show here that the RNase H defect does not cause additional chromosome fragmentation after UV, but inhibits DNA synthesis after replication restart. Genetic analysis implies formation of R-loop-anchored transcription elongation complexes (R-loop-aTECs) in UV-irradiated rnhAB mutants, predicting that their chromosomal DNA will accumulate: (i) RNA:DNA hybrids; (ii) a few slow-to-remove PDs. We confirm both features and also find that both, surprisingly, depend on replication restart. Finally, enriching for the UV-induced RNA:DNA hybrids in the rnhAB uvrA mutants also co-enriches for PDs, showing their co-residence in the same structures. We propose that PD-triggered R-loop-aTECs block head-on replication in RNase H-deficient mutants.
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影响因子:
14.9
作者:
Chon H;Sparks JL;Rychlik M;Nowotny M;Burgers PM;Crouch RJ;Cerritelli SM
通讯作者:
Cerritelli SM
影响因子:
4.5
作者:
De Septenville, Anne L.;Duigou, Stephane;Michel, Benedicte
通讯作者:
Michel, Benedicte
DOI:
10.1007/bf00273933
发表时间:
1991-07-01
期刊:
MOLECULAR & GENERAL GENETICS
影响因子:
--
作者:
ITAYA, M;CROUCH, RJ
通讯作者:
CROUCH, RJ
DOI:
10.1084/jem.20120876
发表时间:
2012-07-30
期刊:
The Journal of experimental medicine
影响因子:
--
作者:
Hiller B;Achleitner M;Glage S;Naumann R;Behrendt R;Roers A
通讯作者:
Roers A
影响因子:
64.5
作者:
Hamperl S;Bocek MJ;Saldivar JC;Swigut T;Cimprich KA
通讯作者:
Cimprich KA