Evidence map›Paper›PMID 18636093›Full record

ArticleThe EMBO journal2008

Crystal structures of the OmpF porin: function in a colicin translocon.

Eiki Yamashita, Mariya V Zhalnina, Stanislav D Zakharov, Onkar Sharma, William A Cramer

Open access · bronzeAbstract read
In one paragraph

Article in The EMBO journal, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 75 papers.

0numbers the graph read from it
0cells of the map it votes in
75citing papers in PubMed
7.8field-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

75 citing papers in PubMed, 148 citations in OpenAlex.

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15 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

5 authors at 2 institutions in 2 countries.

Eiki YamashitaDepartment of Biological Sciences, Purdue University, West Lafayette, IN 47907-1392, USA.
Mariya V Zhalnina
Stanislav D Zakharov
Onkar Sharma
William A Cramer
Institute of Basic Biological Problems · RUPurdue University West Lafayette · US

Funding

THE MECHANISM OF ACTION OF COLICIN E1R01GM018457 · NIGMS · PURDUE UNIVERSITY WEST LAFAYETTE · PI CRAMER, WILLIAM A. · 1985 to 2007
$2.2M
NIGMS NIH HHS GM18457NIGMS NIH HHS R01 GM018457
6 · The paper itself

Abstract

The OmpF porin in the Escherichia coli outer membrane (OM) is required for the cytotoxic action of group A colicins, which are proposed to insert their translocation and active domains through OmpF pores. A crystal structure was sought of OmpF with an inserted colicin segment. A 1.6 A OmpF structure, obtained from crystals formed in 1 M Mg2+, has one Mg2+ bound in the selectivity filter between Asp113 and Glu117 of loop 3. Co-crystallization of OmpF with the unfolded 83 residue glycine-rich N-terminal segment of colicin E3 (T83) that occludes OmpF ion channels yielded a 3.0 A structure with inserted T83, which was obtained without Mg2+ as was T83 binding to OmpF. The incremental electron density could be modelled as an extended poly-glycine peptide of at least seven residues. It overlapped the Mg2+ binding site obtained without T83, explaining the absence of peptide binding in the presence of Mg2+. Involvement of OmpF in colicin passage through the OM was further documented by immuno-extraction of an OM complex, the colicin translocon, consisting of colicin E3, BtuB and OmpF.

Indexed as

Models, MolecularBinding SitesColicinsCrystallizationIon Channel GatingMagnesiumPeptidesPorinsProtein BindingProtein ConformationProtein TransportColicinsMagnesiumOmpF proteinPeptidesPorins

Identifiers

PMID18636093
PMCPMC2516885
OpenAlexW1994835043

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.