Evidence map›Paper›PMID 25299050›Full record

ArticlePLoS computational biology2014

Complete mapping of substrate translocation highlights the role of LeuT N-terminal segment in regulating transport cycle.

Mary Hongying Cheng, Ivet Bahar

Open access · goldAbstract read
In one paragraph

Article in PLoS computational biology, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 42 papers.

0numbers the graph read from it
0cells of the map it votes in
42citing papers in PubMed
4.4field-weighted citation impact, top 5% 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

42 citing papers in PubMed, 66 citations in OpenAlex.

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  11. Advances and Challenges in Rational Drug Design for SLCs.Trends in pharmacological sciences · 2019
    Review
  12. Article
  13. Review
  14. Review
  15. Article
  16. Shared dynamics of LeuT superfamily members and allosteric differentiation by structural irregularities and multimerization.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2018
    Article
  17. Article
  18. Article
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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

2 authors at 1 institution in 1 country.

Mary Hongying ChengDepartment of Computational and Systems Biology, School of Medicine, University of Pittsburgh, Pittsburgh, United States of America.
Ivet BaharDepartment of Computational and Systems Biology, School of Medicine, University of Pittsburgh, Pittsburgh, United States of America.
University of Pittsburgh · US

Funding

TrainingP41GM103712 · NIGMS · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI FAEDER, JAMES · 2012 to 2021
$16.3M
Structural Dynamics of Biomolecular SystemsR01GM086238 · NIGMS · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI BAHAR, IVET · 2009 to 2012
$1.3M
Continued Development of Protein Dynamics Software ProDyR01GM099738 · NIGMS · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI BAHAR, IVET · 2012 to 2015
$1.1M
NIGMS NIH HHS 5R01 GM099738-03NIGMS NIH HHS P41 GM103712NIGMS NIH HHS R01 GM086238NIGMS NIH HHS R01 GM099738
6 · The paper itself

Abstract

Neurotransmitter: sodium symporters (NSSs) regulate neuronal signal transmission by clearing excess neurotransmitters from the synapse, assisted by the co-transport of sodium ions. Extensive structural data have been collected in recent years for several members of the NSS family, which opened the way to structure-based studies for a mechanistic understanding of substrate transport. Leucine transporter (LeuT), a bacterial orthologue, has been broadly adopted as a prototype in these studies. This goal has been elusive, however, due to the complex interplay of global and local events as well as missing structural data on LeuT N-terminal segment. We provide here for the first time a comprehensive description of the molecular events leading to substrate/Na+ release to the postsynaptic cell, including the structure and dynamics of the N-terminal segment using a combination of molecular simulations. Substrate and Na+-release follows an influx of water molecules into the substrate/Na+-binding pocket accompanied by concerted rearrangements of transmembrane helices. A redistribution of salt bridges and cation-π interactions at the N-terminal segment prompts substrate release. Significantly, substrate release is followed by the closure of the intracellular gate and a global reconfiguration back to outward-facing state to resume the transport cycle. Two minimally hydrated intermediates, not structurally resolved to date, are identified: one, substrate-bound, stabilized during the passage from outward- to inward-facing state (holo-occluded), and another, substrate-free, along the reverse transition (apo-occluded).

Indexed as

Bacterial ProteinsComputational BiologyExtracellular SpaceIntracellular SpaceIon TransportLeucineModels, BiologicalMolecular Dynamics SimulationProtein ConformationSymportersBacterial ProteinsLeucineSymporters

Identifiers

PMID25299050
PMCPMC4191883
OpenAlexW2039597629

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.