Cited by 148Cell Adhesion Molecules ResearchBiochemical and Structural CharacterizationProtease and Inhibitor Mechanisms

Structural determinants of integrin β-subunit specificity for latent TGF-β

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Dong, Xianchi, Hudson, Nathan E, Lu, Chafen, Springer, Timothy A·2014·Nature Structural & Molecular Biology

Abstract

Eight integrin α-β heterodimers recognize ligands with an Arg-Gly-Asp (RGD) motif. However, the structural mechanism by which integrins differentiate among extracellular proteins with RGD motifs is not understood. Here, crystal structures, mutations and peptide-affinity measurements show that αVβ6 binds with high affinity to a RGDLXXL/I motif within the prodomains of TGF-β1 and TGF-β3. The LXXL/I motif forms an amphipathic α-helix that binds in a hydrophobic pocket in the β6 subunit. Elucidation of the basis for ligand binding specificity by the integrin β subunit reveals contributions by three different βI-domain loops, which we designate specificity-determining loops (SDLs) 1, 2 and 3. Variation in a pair of single key residues in SDL1 and SDL3 correlates with the variation of the entire β subunit in integrin evolution, thus suggesting a paradigmatic role in overall β-subunit function.

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Crossref · 10.1038/nsmb.2905

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  • The roles of different αv-containing integrins in regulating fibrosis vary by organ.

    “highlighting context dependency of the various αv-containing integrins in the regulation of fibrosis across different organs”

    From Fibrosis: from mechanisms to medicines (2020) · cites this paper as [107]

  • In the same hepatic fibrosis model, global loss of β3, β5, or β6 integrins or conditional loss of β8 integrins in myofibroblasts did not protect against fibrosis.

    “whereas global loss of β3, β5 or β6 integrins or conditional loss of β8 integrins in myofibroblasts did not”

    From Fibrosis: from mechanisms to medicines (2020) · cites this paper as [107]

  • Pharmacological blockade of αv-containing integrins with small molecule CWHM 12 attenuated liver and lung fibrosis even when fibrosis was already established.

    “Pharmacological blockade of αv-containing integrins by a small molecule (CWHM 12) attenuated both liver and lung fibrosis, even when fibrosis was already established107”

    From Fibrosis: from mechanisms to medicines (2020) · cites this paper as [107]

  • Depleting αv integrins on hepatic myofibroblasts using Pdgfrβ-Cre protected mice from carbon tetrachloride-induced hepatic fibrosis.

    “Using Pdgfrβ-Cre mice to deplete αv integrins on hepatic myofibroblasts protected mice from carbon tetrachloride-induced hepatic fibrosis”

    From Fibrosis: from mechanisms to medicines (2020) · cites this paper as [107]

  • Depletion of the αv integrin subunit on mesenchymal cells inhibits fibrosis in models of liver, lung, and kidney fibrosis.

    “depletion of the αv integrin subunit on mesenchymal cells has also proven effective in inhibiting fibrosis in models of liver, lung and kidney fibrosis107”

    From Fibrosis: from mechanisms to medicines (2020) · cites this paper as [107]

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Authors
Dong, X., Hudson, N. E., Lu, C., & Springer, T. A.
Affiliations
Boston Children's Hospital (US)
Corresponding author
Springer, Timothy A
Venue
Nature Structural & Molecular Biology
Published
2014-11-10
Volume
21
Issue
12
Pages
1091-1096
ISSN
  • 1545-9985 (ISSN-L)
  • 1545-9993
OpenAlex
W2017269651
Cited by
141
References
40
Citations by year
2026: 11 · 2025: 8 · 2024: 13 · 2023: 13 · 2022: 8 · 2021: 14 · 2020: 17 · 2019: 13 · 2018: 9 · 2017: 17 · 2016: 10 · 2015: 8
FWCI
8.96
Type
journal article
Language
en
Open access
Locations
  • Nature Structural & Molecular Biology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Heart, Lung, and Blood Institute (P01HL103526)
Topics
  • Health Sciences › Medicine › Immunology and Allergy › Cell Adhesion Molecules Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Biochemical and Structural Characterization
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Protease and Inhibitor Mechanisms
Keywords
integrin αvβ6, latent TGF-beta1, RGD motif, ligand specificity, amphipathic helix, hydrophobic pocket
MeSH terms
Amino Acid Sequence, Antigens, Neoplasm, Binding Sites, Humans, Models, Molecular, Molecular Sequence Data, Mutation, Integrins, Sequence Alignment, Crystallography, X-Ray, Transforming Growth Factor beta1, Transforming Growth Factor beta3, Protein Interaction Domains and Motifs, HEK293 Cells

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