1A3F

PHOSPHOLIPASE A2 (PLA2) FROM NAJA NAJA VENOM


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.65 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.210 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structures of two novel crystal forms of Naja naja naja phospholipase A2 lacking Ca2+ reveal trimeric packing.

Segelke, B.W.Nguyen, D.Chee, R.Xuong, N.H.Dennis, E.A.

(1998) J.Mol.Biol. 279: 223-232

  • DOI: 10.1006/jmbi.1998.1759
  • Primary Citation of Related Structures:  1A3D

  • PubMed Abstract: 
  • Three crystal forms of Naja naja naja phospholipase A2 were discovered through random crystallization screening, including two heretofore uncharacterized forms. The crystallization conditions for both of these novel crystal forms are Ca(2+)-free wher ...

    Three crystal forms of Naja naja naja phospholipase A2 were discovered through random crystallization screening, including two heretofore uncharacterized forms. The crystallization conditions for both of these novel crystal forms are Ca(2+)-free whereas previously reported conditions include Ca2+. One of the new crystal forms has a cubic lattice in the space group P2(1)3 (a = b = c = 69.24 A), the other has an orthorhombic lattice in the space group P2(1)2(1)2(1) (a = 67.22 A, b = 73.48 A, c = 87.52 A) and a previously characterized crystal belong to the tetragonal space group P4(3)2(1)2 (a = b = 88.6 A, c = 107.4 A). The structure from the cubic crystal form has been determined to 1.8 A and refined to an R-factor of 17% while the structure from the orthorhombic form has been determined to 2.65 A and has been refined to an R-factor of 21%. The determination of the cubic structure extends the resolution to which structures of this molecule have been determined from 2.3 A to 1.8 A. The two newly determined structures, in combination with the previously determined structure, generate an informative structural ensemble from which structural changes due to Ca2+, which is required for catalysis, and the effect of crystal contacts on side-chain conformations and oligomeric association can be inferred. Both of the newly determined structures reveal a trimeric oligomer as observed in the tetragonal structure; this appears to be a unique feature of the Naja naja naja enzyme.


    Organizational Affiliation

    Department of Chemistry and Biochemistry, University of California at San Diego, La Jolla 92093, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PHOSPHOLIPASE A2
A, B, C
119Naja najaEC: 3.1.1.4
Find proteins for P15445 (Naja naja)
Go to UniProtKB:  P15445
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.65 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.210 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 67.220α = 90.00
b = 73.480β = 90.00
c = 87.520γ = 90.00
Software Package:
Software NamePurpose
X-PLORrefinement
UCSDdata reduction
X-PLORmodel building
UCSDdata scaling
UCSDdata collection
X-PLORphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-04-29
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance