1FB2

STRUCTURE OF PHOSPHOLIPASE A2 FROM DABOIA RUSSELLI PULCHELLA AT 1.95


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.216 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

Regulation of catalytic function by molecular association: structure of phospholipase A2 from Daboia russelli pulchella (DPLA2) at 1.9 A resolution.

Chandra, V.Kaur, P.Jasti, J.Betzel, C.Singh, T.P.

(2001) Acta Crystallogr.,Sect.D 57: 1793-1798


  • PubMed Abstract: 
  • The crystal structure of phospholipase A(2) from the venom of Daboia russelli pulchella has been refined to an R factor of 0.216 using 17,922 reflections to 1.9 A resolution. The structure contains two crystallographically independent molecules in th ...

    The crystal structure of phospholipase A(2) from the venom of Daboia russelli pulchella has been refined to an R factor of 0.216 using 17,922 reflections to 1.9 A resolution. The structure contains two crystallographically independent molecules in the asymmetric unit. The overall conformations of the two molecules are essentially the same except for three regions, namely the calcium-binding loop including Trp31, the beta-wing and the C-terminal residues 119-131. Although these differences have apparently been caused by molecular packing, they seem to have functional relevance. Particularly noteworthy is the conformation of Trp31, which is favourable for substrate binding in one molecule as it is aligned with one of the side walls of the hydrophobic channel, whereas in the other molecule it is located at the mouth of the channel, thereby blocking the entry of substrates leading to loss of activity. This feature is unique to the present structure and does not occur in the dimers and trimers of other PLA(2)s.


    Related Citations: 
    • Three-Dimensional Structure of a Presynaptic Neurotoxic Phospholipase A2 from Daboia Russelli pulchella at 2.4 Resolution
      Chandra, V.,Kaur, P.,Srinivasan, A.,P Singh, T.
      (2000) J.Mol.Biol. 296: 1117


    Organizational Affiliation

    Department of Biophysics, All India Institute of Medical Sciences, New Delhi 110029, India.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PHOSPHOLIPASE A2
A, B
121Daboia russeliiEC: 3.1.1.4
Find proteins for P59071 (Daboia russelii)
Go to UniProtKB:  P59071
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.216 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 76.100α = 90.00
b = 88.050β = 90.00
c = 79.370γ = 90.00
Software Package:
Software NamePurpose
PROLSQrefinement
MAR345data collection
SCALEPACKdata scaling
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-07-25
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-02-08
    Type: Structure summary
  • Version 1.4: 2017-10-04
    Type: Refinement description