3QR0

Crystal Structure of S. officinalis PLC21


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.208 
  • R-Value Work: 0.176 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

An autoinhibitory helix in the C-terminal region of phospholipase C-beta mediates Galphaq activation.

Lyon, A.M.Tesmer, V.M.Dhamsania, V.D.Thal, D.M.Gutierrez, J.Chowdhury, S.Suddala, K.C.Northup, J.K.Tesmer, J.J.

(2011) Nat.Struct.Mol.Biol. 18: 999-1005

  • DOI: 10.1038/nsmb.2095
  • Primary Citation of Related Structures:  3QR1

  • PubMed Abstract: 
  • The enzyme phospholipase C-β (PLCβ) is a crucial regulator of intracellular calcium levels whose activity is controlled by heptahelical receptors that couple to members of the Gq family of heterotrimeric G proteins. We have determined atomic structur ...

    The enzyme phospholipase C-β (PLCβ) is a crucial regulator of intracellular calcium levels whose activity is controlled by heptahelical receptors that couple to members of the Gq family of heterotrimeric G proteins. We have determined atomic structures of two invertebrate homologs of PLCβ (PLC21) from cephalopod retina and identified a helix from the C-terminal regulatory region that interacts with a conserved surface of the catalytic core of the enzyme. Mutations designed to disrupt the analogous interaction in human PLCβ3 considerably increase basal activity and diminish stimulation by Gαq. Gαq binding requires displacement of the autoinhibitory helix from the catalytic core, thus providing an allosteric mechanism for activation of PLCβ.


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
phospholipase C-beta (PLC-beta)
A
816Sepia officinalisEC: 3.1.4.11
Find proteins for F2YQ19 (Sepia officinalis)
Go to UniProtKB:  F2YQ19
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download SDF File 
Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
CA
Query on CA

Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.208 
  • R-Value Work: 0.176 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 60.815α = 90.00
b = 89.396β = 90.00
c = 163.051γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
HKL-2000data collection
DENZOdata reduction
REFMACrefinement
PDB_EXTRACTdata extraction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-08-10
    Type: Initial release
  • Version 1.1: 2011-08-17
    Type: Database references
  • Version 1.2: 2011-09-14
    Type: Database references