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Human Senataxin Resolves RNA/DNA Hybrids Formed at Transcriptional Pause Sites to Promote Xrn2-Dependent Termination

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Skourti-Stathaki, Konstantina, Proudfoot, Nicholas J., Gromak, Natalia·2011·Molecular Cell

Abstract

We present a molecular dissection of pause site-dependent transcriptional termination for mammalian RNA polymerase II (Pol II)-transcribed genes. We show that nascent transcripts form RNA/DNA hybrid structures (R-loops) behind elongating Pol II and are especially prevalent over G-rich pause sites positioned downstream of gene poly(A) signals. Senataxin, a helicase protein associated with AOA2/ALS4 neurodegenerative disorders, acts to resolve these R-loop structures and by so doing allows access of the 5'-3' exonuclease Xrn2 at 3' cleavage poly(A) sites. This affords 3' transcript degradation and consequent Pol II termination. In effect, R-loops formed over G-rich pause sites, followed by their resolution by senataxin, are key steps in the termination process.

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Crossref · 10.1016/j.molcel.2011.04.026

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Metadata

Authors
Skourti-Stathaki, K., Proudfoot, N. J., & Gromak, N.
Venue
Molecular Cell
Publisher
Elsevier BV
Published
2011-06
Volume
42
Issue
6
Pages
794-805
ISSN
1097-2765 (ISSN-L)
OpenAlex
W2161887614
Cited by
819
References
2
FWCI
13.28
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: Human Senataxin Resolves RNA/DNA Hybrids Formed at Transcriptional Pause Sites to Promote Xrn2-Dependent Termination. https://app.cochat.ai/papers/10.1016/j.molcel.2011.04.026
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Skourti-Stathaki, K., Proudfoot, N. J., & Gromak, N. (2011). Human Senataxin Resolves RNA/DNA Hybrids Formed at Transcriptional Pause Sites to Promote Xrn2-Dependent Termination. Molecular Cell. https://doi.org/10.1016/j.molcel.2011.04.026

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