Biological Assembly 1  

 3D View: Structure | 1D-3D View | Validation Report | Ligand Interaction

Global Symmetry: Dihedral - D2  (3D View)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 1 assigned by authors and generated by PQS (software)

Macromolecule Content

• Total Structure Weight: 74.57 kDa 
• Atom Count: 5627 
• Modelled Residue Count: 656 
• Deposited Residue Count: 658 
• Unique protein chains: 1

2BJG

Crystal Structure of Conjugated Bile Acid Hydrolase from Clostridium perfringens in Complex with Reaction Products Taurine and Deoxycholate

• PDB DOI: 10.2210/pdb2BJG/pdb

• Classification: HYDROLASE
• Organism(s): Clostridium perfringens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2005-02-02 Released: 2005-05-03 
• Deposition Author(s): Rossocha, M., Schultz-Heienbrok, R., Von Moeller, H., Coleman, J.P., Saenger, W.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.246 
• R-Value Work: 0.200 
• R-Value Observed: 0.203 

Literature

Conjugated Bile Acid Hydrolase is a Tetrameric N-Terminal Thiol Hydrolase with Specific Recognition of its Cholyl But not of its Tauryl Product

Rossocha, M., Schultz-Heienbrok, R., Von Moeller, H., Coleman, J.P., Saenger, W.

(2005) Biochemistry 44: 5739

• PubMed: 15823032 
• DOI: 10.1021/bi0473206
• Primary Citation of Related Structures:  
  2BJF, 2BJG


• PubMed Abstract: 
  

Bacterial bile salt hydrolases catalyze the degradation of conjugated bile acids in the mammalian gut. The crystal structures of conjugated bile acid hydrolase (CBAH) from Clostridium perfringens as apoenzyme and in complex with taurodeoxycholate that was hydrolyzed to the reaction products taurine and deoxycholate are described here at 2.1 and 1.7 A resolution, respectively. The crystal structures reveal close relationship between CBAH and penicillin V acylase from Bacillus sphaericus. This similarity together with the N-terminal cysteine classifies CBAH as a member of the N-terminal nucleophile (Ntn) hydrolase superfamily. Both crystal structures show an identical homotetrameric organization with dihedral (D(2) or 222) point group symmetry. The structure analysis of C. perfringens CBAH identifies critical residues in catalysis, substrate recognition, and tetramer formation which may serve in further biochemical characterization of bile acid hydrolases.

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Organizational Affiliation: 

Freie Universität Berlin, Institut für Kristallographie, Takustrasse 6, 14195 Berlin, Germany.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CHOLOYLGLYCINE HYDROLASE	A, B	329	Clostridium perfringens	Mutation(s): 0  EC: 3.5.1.24 (PDB Primary Data), 3.5.1 (UniProt)
UniProt
Find proteins for P54965 (Clostridium perfringens (strain 13 / Type A)) Explore P54965  Go to UniProtKB:  P54965

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
EDO	C [auth A], D [auth A]	1,2-ETHANEDIOL C2 H6 O2 LYCAIKOWRPUZTN-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.246 
• R-Value Work: 0.200 
• R-Value Observed: 0.203 
• Space Group: P 4₁ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 63.784	α = 90
b = 63.784	β = 90
c = 341.367	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling
MOLREP	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2005-02-02 
• Released Date: 2005-05-03 
Deposition Author(s): Rossocha, M., Schultz-Heienbrok, R., Von Moeller, H., Coleman, J.P., Saenger, W.

Revision History  

• Version 1.0: 2005-05-03
  Type: Initial release
  
• Version 1.1: 2011-05-08
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance