Evidence map›Paper›PMID 23124065›Full record

ArticleGenes & development2012

Brr2p-mediated conformational rearrangements in the spliceosome during activation and substrate repositioning.

Daniela Hahn, Grzegorz Kudla, David Tollervey, Jean D Beggs

Open access · diamondAbstract read
In one paragraph

Article in Genes & development, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 54 papers.

0numbers the graph read from it
0cells of the map it votes in
54citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

54 citing papers in PubMed, 79 citations in OpenAlex.

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  19. Life and Death of mRNA Molecules inFrontiers in cellular and infection microbiology · 2018
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

4 authors at 1 institution in 1 country.

Daniela HahnWellcome Trust Centre for Cell Biology, University of Edinburgh, Edinburgh EH9 3JR, United Kingdom.
Grzegorz Kudla
David Tollervey
Jean D Beggs
Wellcome Centre for Cell Biology · GB

Funding

Wellcome Trust 077248Wellcome Trust 087551Wellcome Trust 092076
6 · The paper itself

Abstract

Brr2p is one of eight RNA helicases involved in pre-mRNA splicing. Detailed understanding of the functions of Brr2p and other spliceosomal helicases has been limited by lack of knowledge of their in vivo substrates. To address this, sites of direct Brr2p-RNA interaction were identified by in vivo UV cross-linking in budding yeast. Cross-links identified in the U4 and U6 small nuclear RNAs (snRNAs) suggest U4/U6 stem I as a Brr2p substrate during spliceosome activation. Further Brr2p cross-links were identified in loop 1 of the U5 snRNA and near splice sites and 3' ends of introns, suggesting the possibility of a previously uncharacterized function for Brr2p in the catalytic center of the spliceosome. Consistent with this, mutant brr2-G858R reduced second-step splicing efficiency and enhanced cross-linking to 3' ends of introns. Furthermore, RNA sequencing indicated preferential inhibition of splicing of introns with structured 3' ends. The Brr2-G858Rp cross-linking pattern in U6 was consistent with an open conformation for the catalytic center of the spliceosome during first-to-second-step transition. We propose a previously unsuspected function for Brr2p in driving conformational rearrangements that lead to competence for the second step of splicing.

Indexed as

Enzyme ActivationProtein BindingProtein ConformationRNA, FungalRNA HelicasesRNA, Small NuclearRNA SplicingSaccharomyces cerevisiaeSaccharomyces cerevisiae ProteinsSpliceosomesBRR2 protein, S cerevisiaeRNA, FungalRNA HelicasesRNA, Small NuclearSaccharomyces cerevisiae ProteinsU6 small nuclear RNA

Identifiers

PMID23124065
PMCPMC3489999
OpenAlexW2157070284

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.