The PWWP2A Histone Deacetylase Complex Represses Intragenic Spurious Transcription Initiation in MESCs

Overview

Journal iScience

Publisher Cell Press

Date 2020 Nov 25

PMID 33235983

Citations 5

Authors

Guifeng Wei

Neil Brockdorff

Tianyi Zhang

Affiliations

Soon will be listed here.

Abstract

Transcriptional fidelity depends on accurate promoter selection and initiation from the correct sites. In yeast, H3K36me3-mediated recruitment of the Rpd3S HDAC complex to gene bodies suppresses spurious transcription initiation. Here we describe an equivalent pathway in metazoans. PWWP2A/B is an H3K36me3 reader that forms a stable complex with HDAC1/2. We used CAGE-seq to profile all transcription initiation sites in wild-type mESCs and cells lacking PWWP2A/B. Loss of PWWP2A/B enhances spurious initiation from intragenic sites present in wild-type mESCs, and this effect is associated with increased levels of initiating Pol-II and histone acetylation. Spurious initiation events in DKO mESCs do not overlap in genomic location or chromatin features with spurious sites that arise in KO mESCs, previously reported to function in the suppression of intragenic transcriptional initiation, suggesting these pathways function cooperatively in maintaining the fidelity of transcription initiation in metazoans.

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