RNA-dependent chromatin targeting of TET2 for endogenous retrovirus control in pluripotent stem cells.

RNA-dependent chromatin targeting of TET2 for endogenous retrovirus control in pluripotent stem cells.
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DOI:
10.1038/s41588-018-0060-9
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发表时间:
2018-03
期刊:
影响因子:
30.8
通讯作者:
Wang J
Wang J
中科院分区:
生物学1区
文献类型:
--
作者:
Guallar D;Bi X;Pardavila JA;Huang X;Saenz C;Shi X;Zhou H;Faiola F;Ding J;Haruehanroengra P;Yang F;Li D;Sanchez-Priego C;Saunders A;Pan F;Valdes VJ;Kelley K;Blanco MG;Chen L;Wang H;Sheng J;Xu M;Fidalgo M;Shen X;Wang J

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Ten-eleven translocation (TET) proteins play key roles in regulating the methylation status of DNA through oxidizing methylcytosines (5mC), generating 5-hydroxymethylcytosines (5hmC) that can both serve as stable epigenetic marks and participate in active demethylation. Unlike the other TET-family members, TET2 does not contain a DNA-binding domain, and it remains unclear how it is recruited to chromatin. Here we show that TET2 is recruited by the RNA-binding protein Paraspeckle component 1 (PSPC1) through transcriptionally active loci, including endogenous retroviruses (ERVs) whose long terminal repeats (LTRs) have been co-opted by mammalian genomes as stage- and tissue-specific transcriptional regulatory modules. We find that PSPC1 and TET2 contribute to ERVL and ERVL-associated gene regulation by both transcriptional repression via histone deacetylases and posttranscriptional destabilization of RNAs through 5hmC modification. Our findings provide evidence for a functional role of transcriptionally active ERVs as specific docking sites for RNA epigenetic modulation and gene regulation.
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