1GCT

IS GAMMA-CHYMOTRYPSIN A TETRAPEPTIDE ACYL-ENZYME ADDUCT OF GAMMA-CHYMOTRYPSIN?


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Work: 0.173 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

Is gamma-chymotrypsin a tetrapeptide acyl-enzyme adduct of alpha-chymotrypsin?

Dixon, M.M.Matthews, B.W.

(1989) Biochemistry 28: 7033-7038


  • PubMed Abstract: 
  • Refinement of the structure of gamma-chymotrypsin based on X-ray crystallographic data to 1.6-A resolution has confirmed the overall conformation of the molecule as reported previously [Cohen, G. H., Silverton, E. W., & Davies, D. R. (1981) J. Mol. B ...

    Refinement of the structure of gamma-chymotrypsin based on X-ray crystallographic data to 1.6-A resolution has confirmed the overall conformation of the molecule as reported previously [Cohen, G. H., Silverton, E. W., & Davies, D. R. (1981) J. Mol. Biol. 148, 449-479]. In addition, the new refinement suggests that gamma-chymotrypsin, which is operationally defined by its crystalline habit, may not be the free enzyme but rather a complex, possibly an acyl-enzyme adduct, with the tetrapeptide Pro-Gly-Ala-Tyr (or a close homologue). The crystallographic refinement provides a detailed geometrical description of the enzyme-substrate-solvent interactions that occur in the presumptive adduct.


    Related Citations: 
    • Structure of Gamma-Chymotrypsin in the Range Ph 2.0 To Ph 10.5 Suggests that Gamma-Chymotrypsin is a Covalent Acyl-Enzyme Adduct at Low Ph
      Dixon, M.M.,Brennan, R.G.,Matthews, B.W.
      (1991) Int.J.Biol.Macromol. 13: 89


    Organizational Affiliation

    Institute of Molecular Biology, University of Oregon, Eugene 97403.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GAMMA-CHYMOTRYPSIN A
A
13Bos taurusMutation(s): 0 
EC: 3.4.21.1
Find proteins for P00766 (Bos taurus)
Go to UniProtKB:  P00766
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
GAMMA-CHYMOTRYPSIN A
B
131Bos taurusMutation(s): 0 
EC: 3.4.21.1
Find proteins for P00766 (Bos taurus)
Go to UniProtKB:  P00766
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
GAMMA-CHYMOTRYPSIN A
C
97Bos taurusMutation(s): 0 
EC: 3.4.21.1
Find proteins for P00766 (Bos taurus)
Go to UniProtKB:  P00766
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
TETRAPEPTIDE ADDUCT
D
5N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
UNK
Query on UNK
D
L-PEPTIDE LINKINGC4 H9 N O2

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Work: 0.173 
  • Space Group: P 42 21 2
Unit Cell:
Length (Å)Angle (°)
a = 69.800α = 90.00
b = 69.800β = 90.00
c = 98.100γ = 90.00
Software Package:
Software NamePurpose
AGROVATA/ROTAVATEdata scaling
OSCTSTdata reduction
TNTrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1991-10-15
    Type: Initial release
  • Version 1.1: 2008-03-06
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance
  • Version 1.3: 2012-12-12
    Type: Other
  • Version 1.4: 2013-03-13
    Type: Other