Biological Assembly 1  

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - AB 

Biological assembly 1 generated by PQS (software)

Macromolecule Content

• Total Structure Weight: 25679.06 
• Atom Count: 1700 
• Residue Count: 242 
• Unique protein chains: 3

2JET

Crystal structure of a trypsin-like mutant (S189D , A226G) chymotrypsin.

• DOI: 10.2210/pdb2JET/pdb

• Classification: HYDROLASE
• Organism(s): Rattus norvegicus
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): 2 


• Deposited: 2007-01-22 Released: 2007-09-18 
• Deposition Author(s): Jelinek, B., Katona, G., Fodor, K., Venekei, I., Graf, L.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.2 Å
• R-Value Free: 0.334 
• R-Value Work: 0.276 

Literature

The Crystal Structure of a Trypsin-Like Mutant Chymotrypsin: The Role of Position 226 in the Activity and Specificity of S189D Chymotrypsin.

Jelinek, B., Katona, G., Fodor, K., Venekei, I., Graf, L.

(2008) Protein J. 27: 79

• PubMed: 17805946 
• DOI: 10.1007/s10930-007-9110-3


• PubMed Abstract: 
  

The crystal structure of the S189D+A226G rat chymotrypsin-B mutant has been determined at 2.2 angstroms resolution. This mutant is the most trypsin-like mutant so far in the line of chymotrypsin-to-trypsin conversions, aiming for a more complete understanding of the structural basis of substrate specificity in pancreatic serine proteases. A226G caused significant rearrangements relative to S189D chymotrypsin, allowing an internal conformation of Asp189 which is close to that in trypsin. Serious distortions remain, however, in the activation domain, including zymogen-like features. The pH-profile of activity suggests that the conformation of the S1-site of the mutant is influenced also by the P1 residue of the substrate.

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Organizational Affiliation: 

Department of Biochemistry, Eötvös Loránd University, Pázmány s. 1/C, Budapest, 1117, Hungary. [e-mail]

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
CHYMOTRYPSINOGEN B CHAIN A	A	15	Rattus norvegicus	Mutation(s): 0  Gene Names: Ctrb1 (Ctrb) EC: 3.4.21.1
Find proteins for P07338 (Rattus norvegicus) Go to UniProtKB:  P07338

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
CHYMOTRYPSINOGEN B CHAIN B	B	128	Rattus norvegicus	Mutation(s): 0  Gene Names: Ctrb1 (Ctrb) EC: 3.4.21.1
Find proteins for P07338 (Rattus norvegicus) Go to UniProtKB:  P07338

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details
CHYMOTRYPSINOGEN B CHAIN C	C	99	Rattus norvegicus	Mutation(s): 2  Gene Names: Ctrb1 (Ctrb) EC: 3.4.21.1
Find proteins for P07338 (Rattus norvegicus) Go to UniProtKB:  P07338

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.2 Å
• R-Value Free: 0.334 
• R-Value Work: 0.276 
• Space Group: P 1 2₁ 1

Unit Cell:

Length (Å)	Angle (°)
a = 34.690	α = 90.00
b = 64.351	β = 102.09
c = 44.224	γ = 90.00

Software Package:

Software Name	Purpose
AMoRE	phasing
MOSFLM	data reduction
SCALA	data scaling
REFMAC	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2007-01-22 
• Released Date: 2007-09-18 
• Deposition Author(s): Jelinek, B., Katona, G., Fodor, K., Venekei, I., Graf, L.

Revision History 

• Version 1.0: 2007-09-18
  Type: Initial release
• Version 1.1: 2011-07-13
  Type: Advisory, Version format compliance