4GNK

Crystal structure of Galphaq in complex with full-length human PLCbeta3


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.00 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.214 
  • R-Value Observed: 0.216 

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This is version 1.1 of the entry. See complete history


Literature

Full-length G alpha (q)-phospholipase C-beta 3 structure reveals interfaces of the C-terminal coiled-coil domain.

Lyon, A.M.Dutta, S.Boguth, C.A.Skiniotis, G.Tesmer, J.J.

(2013) Nat Struct Mol Biol 20: 355-362

  • DOI: 10.1038/nsmb.2497
  • Primary Citation of Related Structures:  
    4GNK

  • PubMed Abstract: 
  • Phospholipase C-β (PLCβ) is directly activated by Gαq, but the molecular basis for how its distal C-terminal domain (CTD) contributes to maximal activity is poorly understood. Herein we present both the crystal structure and cryo-EM three-dimensional reconstructions of human full-length PLCβ3 in complex with mouse Gαq ...

    Phospholipase C-β (PLCβ) is directly activated by Gαq, but the molecular basis for how its distal C-terminal domain (CTD) contributes to maximal activity is poorly understood. Herein we present both the crystal structure and cryo-EM three-dimensional reconstructions of human full-length PLCβ3 in complex with mouse Gαq. The distal CTD forms an extended monomeric helical bundle consisting of three antiparallel segments with structural similarity to membrane-binding bin-amphiphysin-Rvs (BAR) domains. Sequence conservation of the distal CTD suggests putative membrane and protein interaction sites, the latter of which bind the N-terminal helix of Gαq in both the crystal structure and cryo-EM reconstructions. Functional analysis suggests that the distal CTD has roles in membrane targeting and in optimizing the orientation of the catalytic core at the membrane for maximal rates of lipid hydrolysis.


    Organizational Affiliation

    Life Sciences Institute, University of Michigan, Ann Arbor, Michigan, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(q) subunit alphaA, C353Mus musculusMutation(s): 0 
Gene Names: g alpha qGnaq
Membrane Entity: Yes 
UniProt
Find proteins for P21279 (Mus musculus)
Explore P21279 
Go to UniProtKB:  P21279
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
1-phosphatidylinositol 4,5-bisphosphate phosphodiesterase beta-3B, D1235Homo sapiensMutation(s): 0 
Gene Names: phospholipase c beta 3PLCB3
EC: 3.1.4.11
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for Q01970 (Homo sapiens)
Explore Q01970 
Go to UniProtKB:  Q01970
PHAROS:  Q01970
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
1-phosphatidylinositol 4,5-bisphosphate phosphodiesterase beta-3E259Homo sapiensMutation(s): 0 
Gene Names: phospholipase c beta 3PLCB3
EC: 3.1.4.11
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for Q01970 (Homo sapiens)
Explore Q01970 
Go to UniProtKB:  Q01970
PHAROS:  Q01970
Protein Feature View
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.00 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.214 
  • R-Value Observed: 0.216 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 91.423α = 90
b = 188.845β = 90
c = 293.857γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
PHASERphasing
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-02-06
    Type: Initial release
  • Version 1.1: 2013-09-04
    Changes: Database references