Evidence map›Paper›PMID 18590050›Full record

ArticleGene expression2008

Mammalian Rrn3 is required for the formation of a transcription competent preinitiation complex containing RNA polymerase I.

Alice H Cavanaugh, Ann Evans, Lawrence I Rothblum

Open access · greenAbstract read
In one paragraph

Article in Gene expression, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
0.1field-weighted citation impact, top 43% of its field
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

16 citing papers in PubMed, 21 citations in OpenAlex.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors at 1 institution in 1 country.

Alice H CavanaughSigfried and Janet Weis Center for Research, Geisinger Clinic, Danville, PA, USA.
Ann Evans
Lawrence I Rothblum
Geisinger Medical Center · US

Funding

Ribosome Biogenesis: A Molecular Checkpoint for Cardiac HypertrophyR01HL077814 · NHLBI · UNIVERSITY OF OKLAHOMA HLTH SCIENCES CTR · PI ROTHBLUM, LAWRENCE I · 2006 to 2009
$1.4M
Protein interactions and initiation by RNA polymerase IR01GM069841 · NIGMS · WEIS CENTER FOR RESEARCH-GEISINGER CLINC · PI ROTHBLUM, LAWRENCE I · 2005 to 2008
$874k
NHLBI NIH HHS R01 HL077814NIGMS NIH HHS GM069841NIGMS NIH HHS R01 GM069841
6 · The paper itself

Abstract

Mammalian Rrn3, an essential, polymerase-associated protein, is inactivated when cells are treated with cycloheximide, resulting in the inhibition of transcription by RNA polymerase I. Although Rrn3 is essential for transcription, its function in rDNA transcription has not been determined. For example, it is unclear whether Rrn3 is required for initiation or elongation by RNA polymerase I. Rrn3 has been shown to interact with the 43-kDa subunit of RNA polymerase I and with two of the subunits of SL1. In the current model for transcription, Rrn3 functions to recruit RNA polymerase I to the committed complex formed by SL1 and the rDNA promoter. To examine the question as to whether Rrn3 is required for the recruitment of RNA polymerase I to the template, we developed a novel assay similar to chromatin immunoprecipitation assays. We found that RNA polymerase I can be recruited to a template in the absence of active Rrn3. However, that complex will not initiate transcription, even after Rrn3 is added to the reaction. Interestingly, the complex that forms in the presence of active Rrn3 is biochemically distinguishable from that which forms in the absence of active Rrn3. For example, the functional complex is fivefold more resistant to heparin than that which forms in the absence of Rrn3. Our data demonstrate that Rrn3 must be present when the committed template complex is forming for transcription to occur.

Indexed as

AnimalsCell LineCycloheximideHeparinMacromolecular SubstancesPol1 Transcription Initiation Complex ProteinsProtein Synthesis InhibitorsRatsRNA Polymerase ITemplates, GeneticTranscription, GeneticCycloheximideHeparinMacromolecular SubstancesPol1 Transcription Initiation Complex ProteinsProtein Synthesis InhibitorsRNA Polymerase IRrn3 protein, rat

Identifiers

PMID18590050
PMCPMC2526047
OpenAlexW2416845944

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.