1OZY

Crystal Structure of Phospholipase A2 (MIPLA3) From Micropechis Ikaheka


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.228 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure and function comparison of Micropechis ikaheka snake venom phospholipase A2 isoenzymes

Lok, S.M.Gao, R.Rouault, M.Lambeau, G.Gopalakrishnakone, P.Swaminathan, K.

(2005) FEBS J. 272: 1211-1220

  • DOI: 10.1111/j.1742-4658.2005.04547.x
  • Primary Citation of Related Structures:  1P7O, 1PWO

  • PubMed Abstract: 
  • Comparison of the crystal structures of three Micropechis ikaheka phospholipase A2 isoenzymes (MiPLA2, MiPLA3 and MiPLA4, which exhibit different levels of pharmacological effects) shows that their C-terminus (residues 110-124) is the most variable. ...

    Comparison of the crystal structures of three Micropechis ikaheka phospholipase A2 isoenzymes (MiPLA2, MiPLA3 and MiPLA4, which exhibit different levels of pharmacological effects) shows that their C-terminus (residues 110-124) is the most variable. M-Type receptor binding affinity of the isoenzymes has also been investigated and MiPLA4 binds to the rabbit M-type receptor with high affinity. Examination of surface charges of the isoenzymes reveals a trend of increase in positive charges with potency. The isoenzymes are shown to oligomerize in a concentration-dependent manner in a semi-denaturing gel. The C-termini of the medium (MiPLA4) and highly potent (MiPLA2) isoenzyme molecules cluster together, forming a highly exposed area. A BLAST search using the sequence of the most potent MiPLA2 results in high similarity to Staphylococcus aureus clotting factor A and cadherin 11. This might explain the myotoxicity, anticoagulant and hemoglobinuria effects of MiPLA2s.


    Related Citations: 
    • Purification and properties of three new phospholipase A2 isoenzymes from Micropechis ikaheka venom
      Gao, R.,Kini, R.M.,Li, G.D.,Luo, R.H.,Selvanayagam, Z.E.,Gopalakrishnakone, P.
      (2001) BIOCHIM.BIOPHYS.ACTA 1545: 30


    Organizational Affiliation

    Institute of Molecular and Cell Biology, Singapore.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PHOSPHOLIPASE A2
A, B
121N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.228 
  • Space Group: P 41
Unit Cell:
Length (Å)Angle (°)
a = 53.522α = 90.00
b = 53.522β = 90.00
c = 148.272γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
MOLREPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-09-28
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance