Cited by 89Protein Kinase Regulation and GTPase SignalingProtein Tyrosine PhosphatasesProtein Structure and Dynamics

Structural and Functional Integration of the PLCγ Interaction Domains Critical for Regulatory Mechanisms and Signaling Deregulation

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Bunney, Tom D., Esposito, Diego, Mas-Droux, Corine, Lamber, Ekatarina, Baxendale, Rhona W., Martins, Marta, Cole, Ambrose, Svergun, Dmitri +2 more·2012·Structure

Abstract

Multidomain proteins incorporating interaction domains are central to regulation of cellular processes. The elucidation of structural organization and mechanistic insights into many of these proteins, however, remain challenging due to their inherent flexibility. Here, we describe the organization and function of four interaction domains in PLCγ1 using a combination of structural biology and biochemical approaches. Intramolecular interactions within the regulatory region center on the cSH2 domain, the only domain that also interacts with the PLC-core. In the context of fibroblast growth-factor receptor signaling, the coordinated involvement of nSH2 and cSH2 domains mediates efficient phosphorylation of PLCγ1 resulting in the interruption of an autoinhibitory interface by direct competition and, independently, dissociation of PLCγ1 from the receptor. Further structural insights into the autoinhibitory surfaces provide a framework to interpret gain-of-function mutations in PLCγ isoforms linked to immune disorders and illustrate a distinct mechanism for regulation of PLC activity by common interaction domains.

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Crossref · 10.1016/j.str.2012.09.005

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  • The N-terminal SH2 (nSH2) domain is positioned at a distance from the core catalytic domains, and is essentially the principal interaction domain for binding to the phosphotyrosine residues in partner proteins.

    “The N-terminal SH2 (nSH2) domain is positioned at a distance from the core catalytic domains, and is essentially the principal interaction domain for binding to the phosphotyrosine residues in partner proteins [87].”
  • The predicted structures of the wild-type and mutant SH2c domains of PLCγ1 and PLCγ2 and the localizations of residues 687 (γ1) and 665 (γ2) are virtually identical to each other.

    “The predicted structures of the wild-type and mutant SH2c domains of PLC␥ 1 and PLC␥ 2 and the localizations of the residues in positions 687 (␥ 1 ) and 665 (␥ 2 ) are virtually identical to each other.”

    From The Phospholipase Cγ2 Mutants R665W and L845F Identified in Ibrutinib-resistant Chronic Lymphocytic Leukemia Patients Are Hypersensitive to the Rho GTPase Rac2 Protein (2016) · cites this paper as [67]

    The Results sections describe crystal structures of PLCγ1 SH2 domains and experiments with PLCγ1 mutants, but do not compare predicted wild-type and mutant cSH2 structures across PLCγ1 and PLCγ2. Searches for residues 687 and 665 found no passage establishing their corresponding locations or the claimed structural similarity. No page numbers are available in our copy. (LLM, conf=0.75)

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Authors
Bunney, T. D., Esposito, D., Mas-Droux, C., Lamber, E., Baxendale, R. W., Martins, M., Cole, A., Svergun, D., Driscoll, P. C., & Katan, M.
Affiliations
  • Institute of Structural and Molecular Biology (GB)
  • National Institute for Medical Research (GB)
  • Research Institute of Molecular Pathology (AT)
  • Birkbeck, University of London (GB)
  • Deutsches Elektronen-Synchrotron DESY (DE)
Corresponding author
Katan, Matilda
Venue
Structure
Publisher
Elsevier BV
Published
2012-12
Volume
20
Issue
12
Pages
2062-2075
ISSN
0969-2126 (ISSN-L)
OpenAlex
W2061677225
Cited by
88
References
28
Citations by year
2026: 2 · 2025: 3 · 2024: 2 · 2023: 7 · 2022: 12 · 2021: 7 · 2020: 12 · 2019: 7 · 2018: 4 · 2017: 4 · 2016: 5 · 2015: 10 · 2014: 11 · 2013: 1 · 2012: 1
FWCI
2.96
Type
journal article
Language
en
Open access
Locations
  • Structure (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • BIROn (Birkbeck, University of London) (submittedVersion)
Funders
  • Cancer Research UK
  • National Institutes of Health
  • Medical Research Council
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Tyrosine Phosphatases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
Keywords
PLCγ1, interaction domains, SH2 domain, SH3 domain, autoinhibition, intramolecular interactions, fibroblast growth factor receptor signaling, protein phosphorylation, gain-of-function mutations, immune disorders, protein structure
MeSH terms
Animals, Cell Line, Enzyme Activation, Humans, Inositol Phosphates, Kinetics, Models, Molecular, Phosphorylation, Protein Binding, Protein Processing, Post-Translational, Thermodynamics, Signal Transduction, Mutagenesis, Site-Directed, Protein Structure, Secondary, Crystallography, X-Ray, Nuclear Magnetic Resonance, Biomolecular, Amino Acid Substitution, Catalytic Domain, Amino Acid Motifs, Sus scrofa, Receptor, Fibroblast Growth Factor, Type 1, Phospholipase C gamma, Protein Interaction Domains and Motifs

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