PTEN modulates gene transcription by redistributing genome-wide RNA polymerase II occupancy.
Journal
Human molecular genetics
ISSN: 1460-2083
Titre abrégé: Hum Mol Genet
Pays: England
ID NLM: 9208958
Informations de publication
Date de publication:
01 09 2019
01 09 2019
Historique:
received:
05
03
2019
revised:
27
04
2019
accepted:
20
05
2019
pubmed:
28
5
2019
medline:
10
3
2020
entrez:
26
5
2019
Statut:
ppublish
Résumé
Control of gene expression is one of the most complex yet continuous physiological processes impacting cellular homeostasis. RNA polymerase II (Pol II) transcription is tightly regulated at promoter-proximal regions by intricate dynamic processes including Pol II pausing, release into elongation and premature termination. Pol II pausing is a phenomenon where Pol II complex pauses within 30-60 nucleotides after initiating the transcription. Negative elongation factor (NELF) and DRB sensitivity inducing factor (DSIF) contribute in the establishment of Pol II pausing, and positive transcription elongation factor b releases (P-TEFb) paused complex after phosphorylating DSIF that leads to dissociation of NELF. Pol II pausing is observed in most expressed genes across the metazoan. The precise role of Pol II pausing is not well understood; however, it's required for integration of signals for gene regulation. In the present study, we investigated the role of phosphatase and tensin homolog (PTEN) in genome-wide transcriptional regulation using PTEN overexpression and PTEN knock-down models. Here we identify that PTEN alters the expression of hundreds of genes, and its restoration establishes genome-wide Pol II promoter-proximal pausing in PTEN null cells. Furthermore, PTEN re-distributes Pol II occupancy across the genome and possibly impacts Pol II pause duration, release and elongation rate in order to enable precise gene regulation at the genome-wide scale. Our observations demonstrate an imperative role of PTEN in global transcriptional regulation that will provide a new direction to understand PTEN-associated pathologies and its management.
Identifiants
pubmed: 31127935
pii: 5498730
doi: 10.1093/hmg/ddz112
pmc: PMC6735678
doi:
Substances chimiques
RNA Polymerase II
EC 2.7.7.-
PTEN Phosphohydrolase
EC 3.1.3.67
PTEN protein, human
EC 3.1.3.67
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
2826-2834Informations de copyright
© The Author(s) 2019. Published by Oxford University Press.
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