3OHM

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.207 

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Ligand Structure Quality Assessment 


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
  • Primary Citation of Related Structures:  
    3OHM

  • 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 proteins (G proteins) activate PLC-βs and in turn are deactivated by these downstream effectors ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(q) subunit alphaA327Mus musculusMutation(s): 0 
Gene Names: Gnaq
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
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
1-phosphatidylinositol-4,5-bisphosphate phosphodiesterase beta-3B885Homo sapiensMutation(s): 0 
Gene Names: PLC 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
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GDP (Subject of Investigation/LOI)
Query on GDP

Download Ideal Coordinates CCD File 
C [auth A]GUANOSINE-5'-DIPHOSPHATE
C10 H15 N5 O11 P2
QGWNDRXFNXRZMB-UUOKFMHZSA-N
 Ligand Interaction
ALF
Query on ALF

Download Ideal Coordinates CCD File 
D [auth A]TETRAFLUOROALUMINATE ION
Al F4
UYOMQIYKOOHAMK-UHFFFAOYSA-J
 Ligand Interaction
ACT
Query on ACT

Download Ideal Coordinates CCD File 
G [auth B], H [auth B], I [auth B]ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
CA
Query on CA

Download Ideal Coordinates CCD File 
F [auth B]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download Ideal Coordinates CCD File 
E [auth A]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.207 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 202.988α = 90
b = 90.881β = 101.16
c = 93.14γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction
HKL-2000data collection

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

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