2ZP5

Carboxylic ester hydrolase, single mutant d49k of bovine pancreatic pla2 enzyme


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.197 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structures and molecular-dynamics studies of three active-site mutants of bovine pancreatic phospholipase A(2)

Kanaujia, S.P.Sekar, K.

(2008) Acta Crystallogr D Biol Crystallogr 64: 1003-1011

  • DOI: https://doi.org/10.1107/S0907444908022713
  • Primary Citation of Related Structures:  
    2ZP3, 2ZP4, 2ZP5

  • PubMed Abstract: 

    Phospholipase A(2) hydrolyzes phospholipids at the sn-2 position to cleave the fatty-acid ester bond of L-glycerophospholipids. The catalytic dyad (Asp99 and His48) along with a nucleophilic water molecule is responsible for enzyme hydrolysis. Furthermore, the residue Asp49 in the calcium-binding loop is essential for controlling the binding of the calcium ion and the catalytic action of phospholipase A(2). To elucidate the structural role of His48 and Asp49, the crystal structures of three active-site single mutants H48N, D49N and D49K have been determined at 1.9 A resolution. Although the catalytically important calcium ion is present in the H48N mutant, the crystal structure shows that proton transfer is not possible from the catalytic water to the mutated residue. In the case of the Asp49 mutants, no calcium ion was found in the active site. However, the tertiary structures of the three active-site mutants are similar to that of the trigonal recombinant enzyme. Molecular-dynamics simulation studies provide a good explanation for the crystallographic results.


  • Organizational Affiliation

    Bioinformatics Centre (Centre of Excellence in Structural Biology and Biocomputing), Supercomputer Education and Research Centre, Indian Institute of Science, Bangalore 560 012, India.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Phospholipase A2123Bos taurusMutation(s): 1 
Gene Names: PLA2G1B
EC: 3.1.1.4
UniProt
Find proteins for P00593 (Bos taurus)
Explore P00593 
Go to UniProtKB:  P00593
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00593
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.197 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 46.187α = 90
b = 46.187β = 90
c = 101.92γ = 120
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data collection
DENZOdata reduction
SCALEPACKdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-11-04
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2021-11-10
    Changes: Database references, Derived calculations
  • Version 1.3: 2023-11-01
    Changes: Data collection, Refinement description