Evidence map›Paper›PMID 27821776›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2016

Ligand-induced and small-molecule control of substrate loading in a hexameric helicase.

Michael R Lawson, Kevin Dyer, James M Berger

Open access · bronzeAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed
3.0field-weighted citation impact, top 9% 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

21 citing papers in PubMed, 39 citations in OpenAlex.

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  20. A Screen formBio · 2017
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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 3 institutions in 1 country.

Michael R LawsonDepartment of Molecular and Cell Biology, University of California, Berkeley, CA 94720.
Kevin DyerLawrence Berkeley National Laboratory, Berkeley, CA 94720.
James M BergerDepartment of Molecular and Cell Biology, University of California, Berkeley, CA 94720; jmberger@jhmi.edu.
Johns Hopkins University · USLawrence Berkeley National Laboratory · USUniversity of California, Berkeley · US

Funding

Univ of Calif Berkeley Chemistry-Biology Interface ProgramT32GM066698 · NIGMS · UNIVERSITY OF CALIFORNIA BERKELEY · PI CHANG, CHRISTOPHER J., FRANCIS, MATTHEW B · 2004 to 2023
$7.5M
Structure/Function Studies of DNA Replication InitiationR01GM071747 · NIGMS · UNIVERSITY OF CALIFORNIA BERKELEY · PI BERGER, JAMES M. · 2005 to 2016
$4.0M
NIGMS NIH HHS R01 GM071747NIGMS NIH HHS T32 GM066698
6 · The paper itself

Abstract

Processive, ring-shaped protein and nucleic acid protein translocases control essential biochemical processes throughout biology and are considered high-prospect therapeutic targets. The Escherichia coli Rho factor is an exemplar hexameric RNA translocase that terminates transcription in bacteria. As with many ring-shaped motor proteins, Rho activity is modulated by a variety of poorly understood mechanisms, including small-molecule therapeutics, protein-protein interactions, and the sequence of its translocation substrate. Here, we establish the mechanism of action of two Rho effectors, the antibiotic bicyclomycin and nucleic acids that bind to Rho's primary RNA recruitment site. Using small-angle X-ray scattering and a fluorescence-based assay to monitor the ability of Rho to switch between open-ring (RNA-loading) and closed-ring (RNA-translocation) states, we found bicyclomycin to be a direct antagonist of ring closure. Reciprocally, the binding of nucleic acids to its N-terminal RNA recruitment domains is shown to promote the formation of a closed-ring Rho state, with increasing primary-site occupancy providing additive stimulatory effects. This study establishes bicyclomycin as a conformational inhibitor of Rho ring dynamics, highlighting the utility of developing assays that read out protein conformation as a prospective screening tool for ring-ATPase inhibitors. Our findings further show that the RNA sequence specificity used for guiding Rho-dependent termination derives in part from an intrinsic ability of the motor to couple the recognition of pyrimidine patterns in nascent transcripts to RNA loading and activity.

Indexed as

Transcription, GeneticAdenosine TriphosphatasesEscherichia coliLigandsModels, MolecularPeptidyl TransferasesProtein ConformationRho FactorRNARNA-Binding ProteinsRNA HelicasesAdenosine TriphosphatasesLigandsPeptidyl TransferasesRho FactorRNARNA-Binding ProteinsRNA HelicasesantibioticATPasehelicasemotor proteintranscription

Identifiers

PMID27821776
PMCPMC5137764
OpenAlexW2551871553

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.