METTL3-mediated m6A modification stabilizes TERRA and maintains telomere stability.
METTL3-mediated m6A modification stabilizes TERRA and maintains telomere stability.
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DOI:
10.1093/nar/gkac1027
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发表时间:
2022-11-11
影响因子:
14.9
通讯作者:
Liu, Haiying
中科院分区:
文献类型:
--
作者:
Chen, Liping;Zhang, Canfeng;Ma, Wenbin;Huang, Junjiu;Zhao, Yong;Liu, Haiying
Telomeric repeat-containing RNA (TERRA) is a type of long non-coding RNA transcribed from telomeres, and it forms R-loops by invasion into telomeric DNA. Since either an excessive or inadequate number of R-loops leads to telomere instability, the TERRA levels need to be delicately modulated. In this study, we found that m6A modification presents on the subtelomeric regions of TERRA and stabilizes it, and the loss of METTL3 impacts telomere stability. Mechanically, the m6A modification on TERRA is catalyzed by METTL3, recognized and stabilized by the m6A reader YTHDC1. Knockdown of either METTL3 or YTHDC1 enhances TERRA degradation. The m6A-modified TERRA forms R-loops and promotes homologous recombination which is essential for the alternative lengthening of telomeres (ALT) pathway in cancer cells. METTL3 depletion leads to R-loop reduction, telomere shortening and instability. Altogether, these findings reveal that METTL3 protects telomeres by catalyzing m6A modification on TERRA, indicating that inhibition or deletion of METTL3 is potentially a new avenue for ALT cancer therapy.
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影响因子:
16.6
作者:
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通讯作者:
Azzalin, Claus M.
DOI:
10.1126/science.1170633
发表时间:
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期刊:
Science (New York, N.Y.)
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DOI:
10.1126/science.1257216
发表时间:
2015-01-16
期刊:
Science (New York, N.Y.)
影响因子:
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通讯作者:
Zou L