RNAi and Ino80 complex control rate limiting translocation step that moves rDNA to eroding telomeres.
RNAi and Ino80 complex control rate limiting translocation step that moves rDNA to eroding telomeres.
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RNAi和INO80复合体控制将rDNA移动到侵蚀的端粒的限速易位步骤。
DOI:
10.1093/nar/gkab586
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发表时间:
2021-08-20
影响因子:
14.9
通讯作者:
Cooper JP
中科院分区:
文献类型:
--
作者:
Apte MS;Masuda H;Wheeler DL;Cooper JP
The discovery of HAATIrDNA, a telomerase-negative survival mode in which canonical telomeres are replaced with ribosomal DNA (rDNA) repeats that acquire chromosome end-protection capability, raised crucial questions as to how rDNA tracts ‘jump’ to eroding chromosome ends. Here, we show that HAATIrDNA formation is initiated and limited by a single translocation that juxtaposes rDNA from Chromosome (Chr) III onto subtelomeric elements (STE) on Chr I or II; this rare reaction requires RNAi and the Ino80 nucleosome remodeling complex (Ino80C), thus defining an unforeseen relationship between these two machineries. The unique STE-rDNA junction created by this initial translocation is efficiently copied to the remaining STE chromosome ends, independently of RNAi or Ino80C. Intriguingly, both RNAi and Ino80C machineries contain a component that plays dual roles in HAATI subtype choice. Dcr1 of the RNAi pathway and Iec1 of Ino80C both promote HAATIrDNA formation as part of their respective canonical machineries, but both also inhibit formation of the exceedingly rare HAATISTE (where STE sequences mobilize throughout the genome and assume chromosome end protection capacity) in non-canonical, pathway-independent manners. This work provides a glimpse into a previously unrecognized crosstalk between RNAi and Ino80C in controlling unusual translocation reactions that establish telomere-free linear chromosome ends.
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影响因子:
21.3
作者:
Michelini F;Pitchiaya S;Vitelli V;Sharma S;Gioia U;Pessina F;Cabrini M;Wang Y;Capozzo I;Iannelli F;Matti V;Francia S;Shivashankar GV;Walter NG;d'Adda di Fagagna F
通讯作者:
d'Adda di Fagagna F
影响因子:
16
作者:
Ferreira, MG;Cooper, JP
通讯作者:
Cooper, JP
DOI:
10.1038/nrg3355
发表时间:
2013-02
期刊:
Nature reviews. Genetics
影响因子:
--
作者:
通讯作者:
--
影响因子:
56.9
作者:
Azzalin, Claus M.;Reichenbach, Patrick;Lingner, Joachim
通讯作者:
Lingner, Joachim
影响因子:
64.5
作者:
Buhler, Marc;Verdel, André;Moazed, Danesh
通讯作者:
Moazed, Danesh