Evidence map›Paper›PMID 23243313›Full record

ArticleThe Journal of biological chemistry2013

ATP alone triggers the outward facing conformation of the maltose ATP-binding cassette transporter.

Huan Bao, Franck Duong

Open access · hybridAbstract read
In one paragraph

Article in The Journal of biological chemistry, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed
1.8field-weighted citation impact, top 15% 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

15 citing papers in PubMed, 28 citations in OpenAlex.

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  13. Structural diversity of ABC transporters.The Journal of general physiology · 2014
    Review
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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.

Huan BaoDepartment of Biochemistry & Molecular Biology, Life Sciences Institute, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada.
Franck Duong
University of British Columbia · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The maltose transporter MalFGK(2) is a study prototype for ABC importers. During catalysis, the MalFG membrane domain alternates between inward and outward facing conformations when the MalK dimer closes and hydrolyzes ATP. Because a rapid ATP hydrolysis depends on MalE and maltose, it has been proposed that closed liganded MalE facilitates the transition to the outward facing conformation. Here we find that, in contrast to the expected, ATP is sufficient for the closure of MalK and for the conversion of MalFG to the outward facing state. The outward facing transporter binds MalE with nanomolar affinity, yet neither MalE nor maltose is necessary or facilitates the transition. Thus, the rapid hydrolysis of ATP observed in the presence of MalE and maltose is not because closed liganded MalE accelerates the formation of the outward facing conformation. These findings have fundamental implications for the description of the transport reaction.

Indexed as

Adenosine TriphosphatasesAdenosine TriphosphateATP-Binding Cassette TransportersBiological TransportEscherichia coli ProteinsFluorescenceKineticsMaltosePeriplasmic Binding ProteinsProtein BindingProtein ConformationProteolipidsTitrimetryAdenosine TriphosphatasesAdenosine TriphosphateATP-Binding Cassette TransportersEscherichia coli ProteinsMalE protein, E coliMaltosemaltose transport system, E coliPeriplasmic Binding ProteinsProteolipidsproteoliposomes

Identifiers

PMID23243313
PMCPMC3561562
OpenAlexW1970294572

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.