6PTI

STRUCTURE OF FORM III CRYSTALS OF BOVINE PANCREATIC TRYPSIN INHIBITOR


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of form III crystals of bovine pancreatic trypsin inhibitor.

Wlodawer, A.Nachman, J.Gilliland, G.L.Gallagher, W.Woodward, C.

(1987) J.Mol.Biol. 198: 469-480


  • PubMed Abstract: 
  • The structure of bovine pancreatic trypsin inhibitor has been solved in a new crystal form III. The crystals belong to space group P2(1)2(1)2 with a = 55.2 A, b = 38.2 A, c = 24.05 A. The structure was solved on the basis of co-ordinates of forms I a ...

    The structure of bovine pancreatic trypsin inhibitor has been solved in a new crystal form III. The crystals belong to space group P2(1)2(1)2 with a = 55.2 A, b = 38.2 A, c = 24.05 A. The structure was solved on the basis of co-ordinates of forms I and II of the inhibitor by molecular replacement, and the X-ray data extending to 1.7 A were used in a restrained least-squares refinement. The final R factor was 0.16, and the deviation of bonded distances from ideality was 0.020 A. Root-mean-square discrepancy between C alpha co-ordinates of forms III and I are 0.47 A, whilst between forms II and III the discrepancy is 0.39 A. These deviations are about a factor of 3 larger than the expected experimental errors, showing that true differences exist between the three crystal forms. Two residues (Arg39 and Asp50) were modeled with two positions for their side-chains. The final model includes 73 water molecules and one phosphate group bound to the protein. Sixteen water molecules occupy approximately the same positions in all three crystal forms studied to date, indicating their close association with the protein molecule. Temperature factors also show a high degree of correlation between the three crystal forms.


    Related Citations: 
    • Comparison of Two Highly Refined Structures of Bovine Pancreatic Trypsin Inhibitor
      Wlodawer, A.,Deisenhofer, J.,Huber, R.
      (1987) J.Mol.Biol. 193: 145
    • Structure of Bovine Pancreatic Trypsin Inhibitor. Results of Joint Neutron and X-Ray Refinement of Crystal Form II
      Wlodawer, A.,Walter, J.,Huber, R.,Sjolin, L.
      (1984) J.Mol.Biol. 180: 307
    • Pancreatic Trypsin Inhibitor. A New Crystal Form and its Analysis
      Walter, J.,Huber, R.
      (1983) J.Mol.Biol. 167: 911


    Organizational Affiliation

    Center for Chemical Physics, National Bureau of Standards, Gaithersburg, MD 20899.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PANCREATIC TRYPSIN INHIBITOR PRECURSOR
A
58Bos taurusMutation(s): 0 
Find proteins for P00974 (Bos taurus)
Go to UniProtKB:  P00974
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download SDF File 
Download CCD File 
A
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 55.200α = 90.00
b = 38.200β = 90.00
c = 24.050γ = 90.00
Software Package:
Software NamePurpose
PROLSQrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 1987-05-13 
  • Released Date: 1987-10-16 
  • Deposition Author(s): Wlodawer, A.

Revision History 

  • Version 1.0: 1987-10-16
    Type: Initial release
  • Version 1.1: 2008-03-25
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance