1CJY

HUMAN CYTOSOLIC PHOSPHOLIPASE A2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.298 
  • R-Value Work: 0.229 
  • R-Value Observed: 0.229 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Crystal structure of human cytosolic phospholipase A2 reveals a novel topology and catalytic mechanism.

Dessen, A.Tang, J.Schmidt, H.Stahl, M.Clark, J.D.Seehra, J.Somers, W.S.

(1999) Cell 97: 349-360

  • DOI: 10.1016/s0092-8674(00)80744-8
  • Primary Citation of Related Structures:  
    1CJY

  • PubMed Abstract: 
  • Cytosolic phospholipase A2 initiates the biosynthesis of prostaglandins, leukotrienes, and platelet-activating factor (PAF), mediators of the pathophysiology of asthma and arthritis. Here, we report the X-ray crystal structure of human cPLA2 at 2.5 A. cP ...

    Cytosolic phospholipase A2 initiates the biosynthesis of prostaglandins, leukotrienes, and platelet-activating factor (PAF), mediators of the pathophysiology of asthma and arthritis. Here, we report the X-ray crystal structure of human cPLA2 at 2.5 A. cPLA2 consists of an N-terminal calcium-dependent lipid-binding/C2 domain and a catalytic unit whose topology is distinct from that of other lipases. An unusual Ser-Asp dyad located in a deep cleft at the center of a predominantly hydrophobic funnel selectively cleaves arachidonyl phospholipids. The structure reveals a flexible lid that must move to allow substrate access to the active site, thus explaining the interfacial activation of this important lipase.


    Organizational Affiliation

    Biochemistry, Wyeth Research, Cambridge, Massachusetts 02140, USA. adessen@genetics.com



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN (CYTOSOLIC PHOSPHOLIPASE A2) AB749Homo sapiensMutation(s): 0 
Gene Names: PLA2G4ACPLA2PLA2G4
EC: 3.1.1.4 (PDB Primary Data), 3.1.1.5 (UniProt)
Find proteins for P47712 (Homo sapiens)
Explore P47712 
Go to UniProtKB:  P47712
NIH Common Fund Data Resources
PHAROS:  P47712
Protein Feature View
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  • Reference Sequence
Small Molecules
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
CAΔG:  33.18000030517578   kJ/mol  BindingDB
CAΔH:  26.040000915527344   kJ/mol  BindingDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.298 
  • R-Value Work: 0.229 
  • R-Value Observed: 0.229 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 153.59α = 90
b = 95.49β = 90
c = 139.13γ = 90
Software Package:
Software NamePurpose
SHARPphasing
X-PLORrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-04-20
    Type: Initial release
  • Version 1.1: 2008-04-26
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance