Retrotransposons hijack alt-EJ for DNA replication and eccDNA biogenesis.
Retrotransposons hijack alt-EJ for DNA replication and eccDNA biogenesis.
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DOI:
10.1038/s41586-023-06327-7
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发表时间:
2023-08
期刊:
影响因子:
64.8
通讯作者:
Zhang, Z. Z. Zhao
中科院分区:
文献类型:
--
作者:
Yang, Fu;Su, Weijia;Chung, Oliver W.;Tracy, Lauren;Wang, Lu;Ramsden, Dale A.;Zhang, Z. Z. Zhao
Retrotransposons are highly enriched in the animal genome. Their activation can rewrite host DNA information and fundamentally impact host biology. While developmental activation of retrotransposons can bring hosts benefits, such as against virus infection, uncontrolled activation promotes diseases or potentially drives aging. Upon activation, retrotransposons use their mRNA as templates to synthesize double-stranded DNA for making new insertions in the host genome. While the reverse transcriptase encoded by them can synthesize the 1st-strand DNA, how the 2nd-strand DNA is generated remains largely unknown. Here we report retrotransposons hijack the alternative end-joining (alt-EJ) DNA repair process from the hosts for a circularization step to synthesize their 2nd-strand DNA. We applied Nanopore sequencing to examine the fates of replicated retrotransposon DNA, and found that 10% of them achieve new insertions, while 90% exist as extrachromosomal circular DNA (eccDNA). Using eccDNA production as a readout, further genetic screens identified factors from alt-EJ as essential for retrotransposon replication. alt-EJ drives the 2nd-strand synthesis of the LTR-retrotransposon DNA via a circularization process, thus is necessitated for eccDNA production and new insertions. Together, our study reveals that alt-EJ is essential in driving the propagation of parasitic genomic retroelements. Our work uncovers a novel conserved function of this understudied DNA repair process, and provides a new perspective to understand, and potentially control, retrotransposon life cycle.
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DOI:
10.1093/bioinformatics/btq033
发表时间:
2010-03-15
期刊:
Bioinformatics (Oxford, England)
影响因子:
--
作者:
Quinlan AR;Hall IM
通讯作者:
Hall IM
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:
5.4
作者:
FINSTON, WI;CHAMPOUX, JJ
通讯作者:
CHAMPOUX, JJ
影响因子:
2.6
作者:
Lammel, U;Klämbt, C
通讯作者:
Klämbt, C
影响因子:
5.4
作者:
RHIM, H;PARK, J;MORROW, CD
通讯作者:
MORROW, CD