1PTG

PHOSPHATIDYLINOSITOL-SPECIFIC PHOSPHOLIPASE C IN COMPLEX WITH MYO-INOSITOL


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.195 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Crystal structure of the phosphatidylinositol-specific phospholipase C from Bacillus cereus in complex with myo-inositol.

Heinz, D.W.Ryan, M.Bullock, T.L.Griffith, O.H.

(1995) EMBO J 14: 3855-3863

  • DOI: 10.1002/j.1460-2075.1995.tb00057.x
  • Primary Citation of Related Structures:  
    1PTD, 1PTG

  • PubMed Abstract: 
  • Phosphatidylinositol (PI), once regarded as an obscure component of membranes, is now recognized as an important reservoir of second messenger precursors and as an anchor for membrane enzymes. PI-specific phospholipase C (PI-PLC) is the enzyme that cleaves PI, invoking numerous cellular responses ...

    Phosphatidylinositol (PI), once regarded as an obscure component of membranes, is now recognized as an important reservoir of second messenger precursors and as an anchor for membrane enzymes. PI-specific phospholipase C (PI-PLC) is the enzyme that cleaves PI, invoking numerous cellular responses. The crystal structure of PI-PLC from Bacillus cereus (EC 3.1.4.10) has been solved at 2.6 A resolution and refined to a crystallographic R factor of 18.7%. The structure consists of an imperfect (beta alpha)8-barrel similar to that first observed for triose phosphate isomerase and does not resemble any other known phospholipase structure. The active site of the enzyme has been identified by determining the structure of PI-PLC in complex with its inhibitor, myo-inositol, at 2.6 A resolution (R factor = 19.5%). This substrate-like inhibitor interacts with a number of residues highly conserved among prokaryotic PI-PLCs. Residues His32 and His82, which are also conserved between prokaryotic and eukaryotic PI-PLCs, most likely act as general base and acid respectively in a catalytic mechanism analogous to that observed for ribonucleases.


    Related Citations: 
    • Crystallization of Phosphatidylinositol-Specific Phospholipase C from Bacillus Cereus
      Bullock, T.L., Ryan, M., Kim, S.L., Remington, S.J., Griffith, O.H.
      (1993) Biophys J 64: 784
    • Phosphatidylinositol-Specific Phospholipase C of Bacillus Cereus: Cloning, Sequencing, and Relationship to Other Phospholipases
      Kuppe, A., Evans, L.M., Mcmillen, D.A., Griffith, O.H.
      (1989) J Bacteriol 171: 6077

    Organizational Affiliation

    Institut für Organische Chemie und Biochemie, Universität Freiburg, Germany.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PHOSPHATIDYLINOSITOL-SPECIFIC PHOSPHOLIPASE CA298Bacillus cereusMutation(s): 0 
Gene Names: PI-PLC
EC: 3.1.4.10 (PDB Primary Data), 4.6.1.13 (UniProt)
UniProt
Find proteins for P14262 (Bacillus cereus)
Explore P14262 
Go to UniProtKB:  P14262
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP14262
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
INS
Query on INS

Download Ideal Coordinates CCD File 
B [auth A]1,2,3,4,5,6-HEXAHYDROXY-CYCLOHEXANE
C6 H12 O6
CDAISMWEOUEBRE-GPIVLXJGSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.195 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 45.2α = 90
b = 45.6β = 90
c = 160.8γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
XDSdata reduction
X-PLORphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1996-07-11
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance