2JET

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


Experimental Data Snapshot

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

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

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

  • 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 unde ...

    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.


    Organizational Affiliation

    Department of Biochemistry, Eötvös Loránd University, Pázmány s. 1/C, Budapest, 1117, Hungary. jelinek@elte.hu




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CHYMOTRYPSINOGEN B CHAIN A
A
15Rattus norvegicusMutation(s): 0 
Gene Names: Ctrb1 (Ctrb)
EC: 3.4.21.1
Find proteins for P07338 (Rattus norvegicus)
Go to UniProtKB:  P07338
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
CHYMOTRYPSINOGEN B CHAIN B
B
128Rattus norvegicusMutation(s): 0 
Gene Names: Ctrb1 (Ctrb)
EC: 3.4.21.1
Find proteins for P07338 (Rattus norvegicus)
Go to UniProtKB:  P07338
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
CHYMOTRYPSINOGEN B CHAIN C
C
99Rattus norvegicusMutation(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 = 34.690α = 90.00
b = 64.351β = 102.09
c = 44.224γ = 90.00
Software Package:
Software NamePurpose
AMoREphasing
MOSFLMdata reduction
SCALAdata scaling
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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