Evidence map›Paper›PMID 34554829›Full record

ArticleScience (New York, N.Y.)2021

Distinct allosteric mechanisms of first-generation MsbA inhibitors.

François A Thélot, Wenyi Zhang, KangKang Song, Chen Xu, Jing Huang, Maofu Liao

Open access · greenAbstract read
In one paragraph

Article in Science (New York, N.Y.), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed, 1 pooled it
3.2field-weighted citation impact, top 6% 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

22 citing papers in PubMed, 1 synthesis or guideline pooled it, 49 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Bacterial cell envelope-targeting antibiotics.Nature reviews. Microbiology · 2026
    Review
  4. Molecular Basis for the Activation ofJournal of the American Chemical Society · 2025
    Article
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  7. Review
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  10. The inactivation ofiScience · 2024
    Article
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  15. Review
  16. 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

6 authors at 3 institutions in 2 countries.

François A ThélotDepartment of Cell Biology, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.ORCID 0000-0002-7439-2137
Wenyi ZhangKey Laboratory of Structural Biology of Zhejiang Province, Westlake University, Hangzhou, China.
KangKang SongDepartment of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, MA, USA.ORCID 0000-0002-5499-5221
Chen XuDepartment of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, MA, USA.
Jing HuangKey Laboratory of Structural Biology of Zhejiang Province, Westlake University, Hangzhou, China.ORCID 0000-0001-9639-2907
Maofu LiaoDepartment of Cell Biology, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.ORCID 0000-0002-3481-450X
Harvard University · USUniversity of Massachusetts Chan Medical School · USWestlake University · CN

Funding

Molecular Mechanisms of Lipopolysaccharide Transport Driven by ABC TransportersR01GM122797 · NIGMS · HARVARD MEDICAL SCHOOL · PI LIAO, MAOFU · 2017 to 2021
$1.7M
NIGMS NIH HHS R01 GM122797
6 · The paper itself

Abstract

ATP-binding cassette (ABC) transporters couple adenosine 5′-triphosphate (ATP) hydrolysis to substrate transport across biological membranes. Although many are promising drug targets, their mechanisms of modulation by small-molecule inhibitors remain largely unknown. Two first-generation inhibitors of the MsbA transporter, tetrahydrobenzothiophene 1 (TBT1) and G247, induce opposite effects on ATP hydrolysis. Using single-particle cryo–electron microscopy and functional assays, we show that TBT1 and G247 bind adjacent yet separate pockets in the MsbA transmembrane domains. Two TBT1 molecules asymmetrically occupy the substrate-binding site, which leads to a collapsed inward-facing conformation with decreased distance between the nucleotide-binding domains (NBDs). By contrast, two G247 molecules symmetrically increase NBD distance in a wide inward-open state of MsbA. The divergent mechanisms of action of these MsbA inhibitors provide important insights into ABC transporter pharmacology.

Indexed as

Adenosine TriphosphatasesAllosteric RegulationATP-Binding Cassette TransportersBacterial ProteinsBinding SitesCryoelectron MicroscopyDrug DiscoveryImaging, Three-DimensionalLipopolysaccharidesModels, MolecularMolecular Dynamics SimulationProtein BindingProtein ConformationSmall Molecule LibrariesAdenosine TriphosphatasesATP-Binding Cassette TransportersBacterial ProteinsLipopolysaccharidesMsbA protein, BacteriaSmall Molecule Libraries

Identifiers

PMID34554829
PMCPMC9109178
OpenAlexW3199360243

What OpenQuestion holds

Textmetadata
LicenceTDM
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.