Structure of crystallisable rat Phospholipase C gamma 1 in complex with inositol 1,4,5-trisphosphate

Experimental Data Snapshot

  • Resolution: 2.00 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.224 
  • R-Value Observed: 0.225 

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Characterization of the membrane interactions of phospholipase C gamma reveals key features of the active enzyme.

Le Huray, K.I.P.Bunney, T.D.Pinotsis, N.Kalli, A.C.Katan, M.

(2022) Sci Adv 8: eabp9688-eabp9688

  • DOI: https://doi.org/10.1126/sciadv.abp9688
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    PLCγ enzymes are autoinhibited in resting cells and form key components of intracellular signaling that are also linked to disease development. Insights into physiological and aberrant activation of PLCγ require understanding of an active, membrane-bound form, which can hydrolyze inositol-lipid substrates. Here, we demonstrate that PLCγ1 cannot bind membranes unless the autoinhibition is disrupted. Through extensive molecular dynamics simulations and experimental evidence, we characterize membrane binding by the catalytic core domains and reveal previously unknown sites of lipid interaction. The identified sites act in synergy, overlap with autoinhibitory interfaces, and are shown to be critical for the phospholipase activity in cells. This work provides direct evidence that PLCγ1 is inhibited through obstruction of its membrane-binding surfaces by the regulatory region and that activation must shift PLCγ1 to a conformation competent for membrane binding. Knowledge of the critical sites of membrane interaction extends the mechanistic framework for activation, dysregulation, and therapeutic intervention.

  • Organizational Affiliation

    Astbury Centre for Structural Molecular Biology, Faculty of Biological Sciences, University of Leeds, Leeds LS2 9JT, UK.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
1-phosphatidylinositol 4,5-bisphosphate phosphodiesterase gamma-11,176Rattus norvegicusMutation(s): 0 
Gene Names: Plcg1
Find proteins for P10686 (Rattus norvegicus)
Explore P10686 
Go to UniProtKB:  P10686
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP10686
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.00 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.224 
  • R-Value Observed: 0.225 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 72.76α = 90
b = 82.44β = 90
c = 230.11γ = 90
Software Package:
Software NamePurpose
XDSdata scaling
XDSdata reduction

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Other privateUnited Kingdom560655

Revision History  (Full details and data files)

  • Version 1.0: 2022-07-20
    Type: Initial release
  • Version 1.1: 2024-01-31
    Changes: Data collection, Refinement description