1CHG

CHYMOTRYPSINOGEN,2.5 ANGSTROMS CRYSTAL STRUCTURE, COMPARISON WITH ALPHA-CHYMOTRYPSIN,AND IMPLICATIONS FOR ZYMOGEN ACTIVATION

• PDB DOI: https://doi.org/10.2210/pdb1CHG/pdb

• Classification: HYDROLASE ZYMOGEN (SERINE PROTEINASE)
• Organism(s): Bos taurus
• Mutation(s): No 


• Deposited: 1975-03-01 Released: 1976-11-22 
• Deposition Author(s): Freer, S.T., Kraut, J., Robertus, J.D., Wright, H.T., Xuong, N.H.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Work: 0.430 

Literature

Chymotrypsinogen: 2.5-angstrom crystal structure, comparison with alpha-chymotrypsin, and implications for zymogen activation.

Freer, S.T., Kraut, J., Robertus, J.D., Wright, H.T., Xuong, N.H.

(1970) Biochemistry 9: 1997-2009

• PubMed: 5442169 
• DOI: https://doi.org/10.1021/bi00811a022
• Primary Citation of Related Structures:  
  1CHG

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 25.69 kDa 
• Atom Count: 1,643 
• Modelled Residue Count: 230 
• Deposited Residue Count: 245 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CHYMOTRYPSINOGEN A	A	245	Bos taurus	Mutation(s): 0  EC: 3.4.21.1
UniProt
Find proteins for P00766 (Bos taurus) Explore P00766  Go to UniProtKB:  P00766

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Work: 0.430 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 52	α = 90
b = 63.9	β = 90
c = 77.1	γ = 90

Structure Validation

Entry History 

Deposition Data

• Released Date: 1976-11-22 
Deposition Author(s): Freer, S.T., Kraut, J., Robertus, J.D., Wright, H.T., Xuong, N.H.

Revision History  

• Version 1.0: 1976-11-22
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 2.0: 2023-09-27
  Type: Remediation
  Changes: Advisory, Atomic model, Data collection, Database references, Derived calculations, Other
• Version 2.1: 2024-10-23
  Changes: Structure summary