Evidence map›Paper›PMID 27989620›Full record

ArticleStructure (London, England : 1993)2017

Flexibility in the Periplasmic Domain of BamA Is Important for Function.

Lisa R Warner, Petia Z Gatzeva-Topalova, Pamela A Doerner, Arthur Pardi, Marcelo C Sousa

Open access · bronzeAbstract read
In one paragraph

Article in Structure (London, England : 1993), 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers.

0numbers the graph read from it
0cells of the map it votes in
32citing papers in PubMed
3.5field-weighted citation impact, top 7% 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

32 citing papers in PubMed, 45 citations in OpenAlex.

  1. Review
  2. Review
  3. A fluorescent reporter and single-turnover kinetics reveal insight into BAM complex function.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
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  5. Review
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  17. Reversible autoinhibitory regulation ofProceedings of the National Academy of Sciences of the United States of America · 2020
    Article
  18. Review
  19. Article
  20. Review
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

5 authors at 1 institution in 1 country.

Lisa R WarnerDepartment of Chemistry and Biochemistry, University of Colorado, 596 UCB, Boulder, CO 80309, USA.
Petia Z Gatzeva-TopalovaDepartment of Chemistry and Biochemistry, University of Colorado, 596 UCB, Boulder, CO 80309, USA.
Pamela A DoernerDepartment of Chemistry and Biochemistry, University of Colorado, 596 UCB, Boulder, CO 80309, USA.
Arthur PardiDepartment of Chemistry and Biochemistry, University of Colorado, 596 UCB, Boulder, CO 80309, USA. Electronic address: arthur.pardi@colorado.edu.
Marcelo C SousaDepartment of Chemistry and Biochemistry, University of Colorado, 596 UCB, Boulder, CO 80309, USA. Electronic address: marcelo.sousa@colorado.edu.
University of Colorado Boulder · US

Funding

Women's health: interplay of maternal diet and key demographics on neurological health in the rural frontier and remote WestP20GM103408 · NIGMS · UNIVERSITY OF IDAHO · PI Scott A Minnich · 2012 to 2026
$59.8M
VPS35 D620N inhibits autophagy through disrupted hyaluronic acid-CD44 signalingP20GM109095 · NIGMS · BOISE STATE UNIVERSITY · PI OXFORD, JULIA THOM · 2014 to 2023
$22.7M
Purchase of 900 MHz NMR SpectrometerP41GM068928 · NIGMS · UNIVERSITY OF COLORADO AT BOULDER · PI WUTTKE, DEBORAH S. · 2003 to 2009
$6.4M
TRAINING IN SIGNAL TRANSDUCTION &CELL CYCLE REGULATIONT32GM008759 · NIGMS · UNIVERSITY OF COLORADO AT BOULDER · PI AHN, NATALIE G. · 2000 to 2020
$5.9M
Predoctoral Training Molecular BiophysicsT32GM065103 · NIGMS · UNIVERSITY OF COLORADO AT BOULDER · PI FALKE, JOSEPH J · 2002 to 2021
$4.3M
Predoctoral Training Program in Signaling and Cellular Regulation INCLUDE Down Syndrome SupplementT32GM142607 · NIGMS · UNIVERSITY OF COLORADO · PI Sabrina Leigh Spencer, Tin Tin Su · 2021 to 2026
$3.6M
Transport and Insertion of Outer Membrane ProteinsR01AI080709 · NIAID · UNIVERSITY OF COLORADO · PI SOUSA, MARCELO C. · 2009 to 2016
$2.6M
Mechanism of Transport and Folding of Outer Membrane ProteinsR01GM127462 · NIGMS · UNIVERSITY OF COLORADO · PI SOUSA, MARCELO C. · 2018 to 2021
$1.3M
Purchase of 800 MHz NMR SpectrometerS10RR016649 · NCRR · UNIVERSITY OF COLORADO AT BOULDER · PI PARDI, ARTHUR · 2002 to 2002
$500k
PURCHASE OF 600 MHZ NMR AND UPGRADE OF NMR FACILITIESS10RR011969 · NCRR · UNIVERSITY OF COLORADO AT BOULDER · PI PARDI, ARTHUR · 1997 to 1997
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NCRR NIH HHS S10 RR011969NCRR NIH HHS S10 RR016649NIAID NIH HHS R01 AI080709NIGMS NIH HHS P20 GM103408NIGMS NIH HHS P20 GM109095NIGMS NIH HHS P41 GM068928NIGMS NIH HHS R01 GM127462NIGMS NIH HHS T32 GM008759NIGMS NIH HHS T32 GM065103NIGMS NIH HHS T32 GM142607
6 · The paper itself

Abstract

The β-barrel assembly machine (BAM) mediates the biogenesis of outer membrane proteins (OMPs) in Gram-negative bacteria. BamA, the central BAM subunit composed of a transmembrane β-barrel domain linked to five polypeptide transport-associated (POTRA) periplasmic domains, is thought to bind nascent OMPs and undergo conformational cycling to catalyze OMP folding and insertion. One model is that conformational flexibility between POTRA domains is part of this conformational cycling. Nuclear magnetic resonance (NMR) spectroscopy was used here to study the flexibility of the POTRA domains 1-5 in solution. NMR relaxation studies defined effective rotational correlational times and together with residual dipolar coupling data showed that POTRA1-2 is flexibly linked to POTRA3-5. Mutants of BamA that restrict flexibility between POTRA2 and POTRA3 by disulfide crosslinking displayed impaired function in vivo. Together these data strongly support a model in which conformational cycling of hinge motions between POTRA2 and POTRA3 in BamA is required for biological function.

Indexed as

Bacterial Outer Membrane ProteinsEscherichia coliEscherichia coli ProteinsModels, MolecularMutationNuclear Magnetic Resonance, BiomolecularPeriplasmProtein DomainsProtein FoldingProtein Structure, SecondaryBacterial Outer Membrane ProteinsBamA protein, E coliEscherichia coli ProteinsBamAdisulfide crosslinkingEscherichia coliinterdomain flexibilityPOTRAresidual dipolar couplings

Identifiers

PMID27989620
PMCPMC5235167
OpenAlexW2562194970

What OpenQuestion holds

Textmetadata
LicenceTDM
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.