Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report

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

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

Macromolecule Content

• Total Structure Weight: 70.11 kDa 
• Atom Count: 5177 
• Modelled Residue Count: 632 
• Deposited Residue Count: 632 
• Unique protein chains: 1

2HF0

Bifidobacterium longum bile salt hydrolase

• PDB DOI: 10.2210/pdb2HF0/pdb

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


• Deposited: 2006-06-22 Released: 2006-09-19 
• Deposition Author(s): Suresh, C.G., Kumar, R.S., Brannigan, J.A.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.228 
• R-Value Work: 0.185 
• R-Value Observed: 0.187 

Literature

Structural and Functional Analysis of a Conjugated Bile Salt Hydrolase from Bifidobacterium longum Reveals an Evolutionary Relationship with Penicillin V Acylase.

Kumar, R.S., Brannigan, J.A., Prabhune, A.A., Pundle, A.V., Dodson, G.G., Dodson, E.J., Suresh, C.G.

(2006) J Biol Chem 281: 32516-32525

• PubMed: 16905539 
• DOI: 10.1074/jbc.M604172200
• Primary Citation of Related Structures:  
  2HEZ, 2HF0


• PubMed Abstract: 
  

Bile salt hydrolase (BSH) is an enzyme produced by the intestinal microflora that catalyzes the deconjugation of glycine- or taurine-linked bile salts. The crystal structure of BSH reported here from Bifidobacterium longum reveals that it is a member of N-terminal nucleophil hydrolase structural superfamily possessing the characteristic alphabetabetaalpha tetra-lamellar tertiary structure arrangement. Site-directed mutagenesis of the catalytic nucleophil residue, however, shows that it has no role in zymogen processing into its corresponding active form. Substrate specificity was studied using Michaelis-Menten and inhibition kinetics and fluorescence spectroscopy. These data were compared with the specificity profile of BSH from Clostridium perfrigens and pencillin V acylase from Bacillus sphaericus, for both of which the three-dimensional structures are available. Comparative analysis shows a gradation in activity toward common substrates, throwing light on a possible common route toward the evolution of pencillin V acylase and BSH.

---

Organizational Affiliation: 

Division of Biochemical Sciences, National Chemical Laboratory, Pune 411 008, India.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Bile salt hydrolase	A, B	316	Bifidobacterium longum	Mutation(s): 0  Gene Names: bsh EC: 3.5.1.24 (PDB Primary Data), 3.5.1 (UniProt), 3.5.1.74 (UniProt)
UniProt
Find proteins for Q9KK62 (Bifidobacterium longum) Explore Q9KK62  Go to UniProtKB:  Q9KK62

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.228 
• R-Value Work: 0.185 
• R-Value Observed: 0.187 
• Space Group: P 6₁ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 123.981	α = 90
b = 123.981	β = 90
c = 219.565	γ = 120

Software Package:

Software Name	Purpose
REFMAC	refinement
AMoRE	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2006-06-22 
• Released Date: 2006-09-19 
Deposition Author(s): Suresh, C.G., Kumar, R.S., Brannigan, J.A.

Revision History  

• Version 1.0: 2006-09-19
  Type: Initial release
  
• Version 1.1: 2008-05-01
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Advisory, Derived calculations, Version format compliance