Evidence map›Paper›PMID 26753910›Full record

ArticleNature communications2016

An electrostatic mechanism for Ca(2+)-mediated regulation of gap junction channels.

Brad C Bennett, Michael D Purdy, Kent A Baker, Chayan Acharya, William E McIntire, Raymond C Stevens, Qinghai Zhang, Andrew L Harris, Ruben Abagyan, Mark Yeager

Open access · goldAbstract read
In one paragraph

Article in Nature communications, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 96 papers.

0numbers the graph read from it
0cells of the map it votes in
96citing papers in PubMed
9.7field-weighted citation impact, top 2% 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

96 citing papers in PubMed, 158 citations in OpenAlex.

  1. Innexin2 Regulates Limb Regeneration inAnimals : an open access journal from MDPI · 2026
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36 more citing papers are in PubMed but not listed here.

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

10 authors at 5 institutions in 1 country.

Brad C BennettDepartment of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville, Virginia 22908, USA.
Michael D PurdyDepartment of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville, Virginia 22908, USA.
Kent A BakerDepartment of Cell and Molecular Biology, The Scripps Research Institute, La Jolla, California 92037, USA.
Chayan AcharyaSkaggs School of Pharmacy and Pharmaceutical Sciences, University of California at San Diego, La Jolla, California 92093, USA.
William E McIntireDepartment of Pharmacology, University of Virginia School of Medicine, Charlottesville, Virginia 22908, USA.
Raymond C StevensDepartments of Biological Sciences and Chemistry, Bridge Institute, University of Southern California, Los Angeles, California 90089, USA.
Qinghai ZhangDepartment of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, California 92037, USA.
Andrew L HarrisDepartment of Pharmacology, Physiology and Neuroscience, Rutgers New Jersey Medical School, Newark, New Jersey 07103, USA.
Ruben AbagyanSkaggs School of Pharmacy and Pharmaceutical Sciences, University of California at San Diego, La Jolla, California 92093, USA.
Mark YeagerDepartment of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville, Virginia 22908, USA.
University of Virginia · USScripps Research Institute · USUniversity of Montana · USRutgers, The State University of New Jersey · USUniversity of Southern California · US

Funding

JCSG Center:Innovative Membrane Protein Technology (RMI)P50GM073197 · NIGMS · SCRIPPS RESEARCH INSTITUTE, THE · PI STEVENS, RAYMOND C · 2004 to 2013
$26.8M
Structure and Dynamics of Gap Junction ChannelsR01HL048908 · NHLBI · UNIVERSITY OF VIRGINIA · PI YEAGER, MARK JAY · 1994 to 2013
$5.1M
Macromolecular DockingR01GM071872 · NIGMS · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI ABAGYAN, RUBEN · 2004 to 2017
$4.2M
Mediating Membrane Protein Crystal Contacts by Stabilization ReagentsR01GM098538 · NIGMS · SCRIPPS RESEARCH INSTITUTE, THE · PI ZHANG, QINGHAI · 2011 to 2015
$1.8M
NCI NIH HHS Y1-CO-1020NHLBI NIH HHS R01 HL048908NIGMS NIH HHS P50 GM073197NIGMS NIH HHS R01 GM071872NIGMS NIH HHS R01 GM098538NIGMS NIH HHS Y1-GM-1104
6 · The paper itself

Abstract

Gap junction channels mediate intercellular signalling that is crucial in tissue development, homeostasis and pathologic states such as cardiac arrhythmias, cancer and trauma. To explore the mechanism by which Ca(2+) blocks intercellular communication during tissue injury, we determined the X-ray crystal structures of the human Cx26 gap junction channel with and without bound Ca(2+). The two structures were nearly identical, ruling out both a large-scale structural change and a local steric constriction of the pore. Ca(2+) coordination sites reside at the interfaces between adjacent subunits, near the entrance to the extracellular gap, where local, side chain conformational rearrangements enable Ca(2+)chelation. Computational analysis revealed that Ca(2+)-binding generates a positive electrostatic barrier that substantially inhibits permeation of cations such as K(+) into the pore. Our results provide structural evidence for a unique mechanism of channel regulation: ionic conduction block via an electrostatic barrier rather than steric occlusion of the channel pore.

Indexed as

Static ElectricityAnimalsCalciumConnexin 26ConnexinsCrystallizationCrystallography, X-RayHumansMolecular Dynamics SimulationProtein Structure, TertiarySf9 CellsSpodopteraSynchrotronsCalciumConnexin 26ConnexinsGJB2 protein, human

Identifiers

PMID26753910
PMCPMC4730032
OpenAlexW2255989330

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.