Integrator enforces the fidelity of transcriptional termination at protein-coding genes.
Integrator enforces the fidelity of transcriptional termination at protein-coding genes.
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集成剂在蛋白质编码基因上执行转录终止的保真度。
DOI:
10.1126/sciadv.abe3393
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发表时间:
2021-11-05
期刊:
影响因子:
13.6
通讯作者:
Shiekhattar R
中科院分区:
文献类型:
--
作者:
Dasilva LF;Blumenthal E;Beckedorff F;Cingaram PR;Gomes Dos Santos H;Edupuganti RR;Zhang A;Dokaneheifard S;Aoi Y;Yue J;Kirstein N;Tayari MM;Shilatifard A;Shiekhattar R
Integrator directly binds and terminates protein-coding transcripts enriched in alternative polyadenylation sequences. Integrator regulates the 3′-end processing and termination of multiple classes of noncoding RNAs. Depletion of INTS11, the catalytic subunit of Integrator, or ectopic expression of its catalytic dead enzyme impairs the 3′-end processing and termination of a set of protein-coding transcripts termed Integrator-regulated termination (IRT) genes. This defect is manifested by increased RNA polymerase II (RNAPII) readthrough and occupancy of serine-2 phosphorylated RNAPII, de novo trimethylation of lysine-36 on histone H3, and a compensatory elevation of the cleavage and polyadenylation (CPA) complex beyond the canonical polyadenylation sites. 3′ RNA sequencing reveals that proximal polyadenylation site usage relies on the endonuclease activity of INTS11. The DNA sequence encompassing the transcription end sites of IRT genes features downstream polyadenylation motifs and an enrichment of GC content that permits the formation of secondary structures within the 3′UTR. Together, this study identifies a subset of protein-coding transcripts whose 3′ end processing requires the Integrator complex.
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