3OHM

Crystal structure of activated G alpha Q bound to its effector phospholipase C beta 3


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.204 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Kinetic Scaffolding Mediated by a Phospholipase C-{beta} and Gq Signaling Complex.

Waldo, G.L.Ricks, T.K.Hicks, S.N.Cheever, M.L.Kawano, T.Tsuboi, K.Wang, X.Montell, C.Kozasa, T.Sondek, J.Harden, T.K.

(2010) Science 330: 974-980

  • DOI: 10.1126/science.1193438

  • PubMed Abstract: 
  • Transmembrane signals initiated by a broad range of extracellular stimuli converge on nodes that regulate phospholipase C (PLC)-dependent inositol lipid hydrolysis for signal propagation. We describe how heterotrimeric guanine nucleotide-binding prot ...

    Transmembrane signals initiated by a broad range of extracellular stimuli converge on nodes that regulate phospholipase C (PLC)-dependent inositol lipid hydrolysis for signal propagation. We describe how heterotrimeric guanine nucleotide-binding proteins (G proteins) activate PLC-βs and in turn are deactivated by these downstream effectors. The 2.7-angstrom structure of PLC-β3 bound to activated Gα(q) reveals a conserved module found within PLC-βs and other effectors optimized for rapid engagement of activated G proteins. The active site of PLC-β3 in the complex is occluded by an intramolecular plug that is likely removed upon G protein-dependent anchoring and orientation of the lipase at membrane surfaces. A second domain of PLC-β3 subsequently accelerates guanosine triphosphate hydrolysis by Gα(q), causing the complex to dissociate and terminate signal propagation. Mutations within this domain dramatically delay signal termination in vitro and in vivo. Consequently, this work suggests a dynamic catch-and-release mechanism used to sharpen spatiotemporal signals mediated by diverse sensory inputs.


    Organizational Affiliation

    Department of Pharmacology, University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Guanine nucleotide-binding protein G(q) subunit alpha
A
327Mus musculusMutation(s): 0 
Gene Names: Gnaq
Find proteins for P21279 (Mus musculus)
Go to UniProtKB:  P21279
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
1-phosphatidylinositol-4,5-bisphosphate phosphodiesterase beta-3
B
885Homo sapiensMutation(s): 0 
Gene Names: PLCB3
EC: 3.1.4.11
Find proteins for Q01970 (Homo sapiens)
Go to Gene View: PLCB3
Go to UniProtKB:  Q01970
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GDP
Query on GDP

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Download CCD File 
A
GUANOSINE-5'-DIPHOSPHATE
C10 H15 N5 O11 P2
QGWNDRXFNXRZMB-UUOKFMHZSA-N
 Ligand Interaction
ACT
Query on ACT

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Download CCD File 
B
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
CA
Query on CA

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B
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
ALF
Query on ALF

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Download CCD File 
A
TETRAFLUOROALUMINATE ION
Al F4
UYOMQIYKOOHAMK-UHFFFAOYSA-J
 Ligand Interaction
MG
Query on MG

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Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.204 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 202.988α = 90.00
b = 90.881β = 101.16
c = 93.140γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction
DENZOdata reduction
HKL-2000data collection
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-10-27
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance