Evidence map›Paper›PMID 29262359›Full record

ArticleBiophysical journal2017

A Hinged Signal Peptide Hairpin Enables Tat-Dependent Protein Translocation.

Shruthi Hamsanathan, Tamil S Anthonymuthu, Umesh K Bageshwar, Siegfried M Musser

Open access · bronzeAbstract read
In one paragraph

Article in Biophysical journal, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed
1.3field-weighted citation impact, top 16% 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

11 citing papers in PubMed, 18 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

4 authors at 3 institutions in 1 country.

Shruthi HamsanathanDepartment of Molecular and Cellular Medicine, College of Medicine, The Texas A&M Health Science Center, Texas A&M University, College Station, Texas.
Tamil S AnthonymuthuDepartment of Critical Care Medicine, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania.
Umesh K BageshwarDepartment of Molecular and Cellular Medicine, College of Medicine, The Texas A&M Health Science Center, Texas A&M University, College Station, Texas.
Siegfried M MusserDepartment of Molecular and Cellular Medicine, College of Medicine, The Texas A&M Health Science Center, Texas A&M University, College Station, Texas. Electronic address: smusser@tamhsc.edu.
Texas A&M University · USTexas A&M Health Science Center · USUniversity of Pittsburgh · US

Funding

Single Molecule Analysis of Bacterial Protein TransportR01GM065534 · NIGMS · TEXAS A&M UNIVERSITY HEALTH SCIENCE CTR · PI MUSSER, SIEGFRIED M · 2003 to 2010
$1.6M
Bacterial Export of Folded Proteins: Transport Mechanism of the Tat TransloconR01GM116995 · NIGMS · TEXAS A&M UNIVERSITY HEALTH SCIENCE CTR · PI MUSSER, SIEGFRIED M · 2016 to 2019
$1.2M
NIGMS NIH HHS R01 GM065534NIGMS NIH HHS R01 GM116995
6 · The paper itself

Abstract

The Tat machinery catalyzes the transport of folded proteins across the bacterial cytoplasmic membrane and the thylakoid membrane in plants. Using fluorescence quenching and cross-linking approaches, we demonstrate that the Escherichia coli TatBC complex catalyzes insertion of a pre-SufI signal peptide hairpin that penetrates about halfway across the membrane bilayer. Analysis of 512 bacterial Tat signal peptides using secondary structure prediction and docking algorithms suggest that this hairpin interaction mode is generally conserved. An internal cross-link in the signal peptide that blocks transport but does not affect binding indicates that a signal peptide conformational change is required during translocation. These results suggest, to our knowledge, a novel hairpin-hinge model in which the signal peptide hairpin unhinges during movement of the mature domain across the membrane. Thus, in addition to enabling the necessary recognition, the interaction of Tat signal peptides with the receptor complex plays a critical role in the transport process itself.

Indexed as

Protein Sorting SignalsGene Products, tatLipid BilayersModels, MolecularProtein ConformationProtein TransportWaterGene Products, tatLipid BilayersProtein Sorting SignalsWater

Identifiers

PMID29262359
PMCPMC5770558
OpenAlexW2778592063

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.