Cited by 29Drug Transport and Resistance MechanismsAntibiotic Resistance in BacteriaEnzyme Structure and Function

Principles of Alternating Access in Multidrug and Toxin Extrusion (MATE) Transporters

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Claxton, Derek P., Jagessar, Kevin L., Mchaourab, Hassane S.·2021·Journal of Molecular Biology

Abstract

The multidrug and toxin extrusion (MATE) transporters catalyze active efflux of a broad range of chemically- and structurally-diverse compounds including antimicrobials and chemotherapeutics, thus contributing to multidrug resistance in pathogenic bacteria and cancers. Multiple methodological approaches have been taken to investigate the structural basis of energy transduction and substrate translocation in MATE transporters. Crystal structures representing members from all three MATE subfamilies have been interpreted within the context of an alternating access mechanism that postulates occupation of distinct structural intermediates in a conformational cycle powered by electrochemical ion gradients. Here we review the structural biology of MATE transporters, integrating the crystallographic models with biophysical and computational studies to define the molecular determinants that shape the transport energy landscape. This holistic analysis highlights both shared and disparate structural and functional features within the MATE family, which underpin an emerging theme of mechanistic diversity within the framework of a conserved structural scaffold.

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Crossref · 10.1016/j.jmb.2021.166959

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  • The divergence in performance may stem from the composition of the AF2 training set, which featured structures of many active GPCRs but no structures of IF MATEs.

    “This divergence in performance may stem from the composition of the AF2 training set, which featured the structures of many active GPCRs but no structures, for example, of IF MATEs (Claxton et al., 2021).”

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Authors
Claxton, D. P., Jagessar, K. L., & Mchaourab, H. S.
Affiliations
Vanderbilt University (US)
Corresponding author
Mchaourab, Hassane S.
Venue
Journal of Molecular Biology
Publisher
Elsevier BV
Published
2021-08
Volume
433
Issue
16
Pages
166959
ISSN
0022-2836 (ISSN-L)
OpenAlex
W3136754634
Cited by
29
References
89
Citations by year
2026: 4 · 2025: 5 · 2024: 8 · 2023: 4 · 2022: 5 · 2021: 3
FWCI
0.61
Type
journal article
Language
en
Open access
Locations
  • Journal of Molecular Biology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institute of General Medical Sciences (R01-GM077659)
  • National Institutes of Health
Topics
  • Health Sciences › Medicine › Oncology › Drug Transport and Resistance Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Medicine › Antibiotic Resistance in Bacteria
  • Physical Sciences › Materials Science › Materials Chemistry › Enzyme Structure and Function
Keywords
MATE transporters, alternating access mechanism, multidrug resistance, active efflux, crystal structure, conformational cycle, substrate translocation, energy transduction, antimicrobial resistance, chemoresistance
MeSH terms
Animals, Drug Resistance, Humans, Models, Molecular, Protein Conformation, Structure-Activity Relationship, Conserved Sequence, Organic Cation Transport Proteins

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