Biological Assembly 1  

 3D View: Structure | Electron Density

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

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

Biological Assembly 2  

 3D View: Structure | Electron Density

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

Biological assembly 2 assigned by authors and generated by PQS (software)

Macromolecule Content

• Total Structure Weight: 40.61 kDa 
• Atom Count: 2575 
• Residue Count: 342 
• Unique protein chains: 1

1W74

X-ray structure of peptidyl-prolyl cis-trans isomerase A, PpiA, Rv0009, from Mycobacterium tuberculosis.

• DOI: 10.2210/pdb1W74/pdb

• Classification: ISOMERASE
• Organism(s): Mycobacterium tuberculosis H37Rv
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• Deposited: 2004-08-27 Released: 2004-10-20 
• Deposition Author(s): Henriksson, L.M., Johansson, P., Unge, T., Mowbray, S.L.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Free: 0.229 
• R-Value Work: 0.212 
• R-Value Observed: 0.213 

Literature

X-Ray Structure of Peptidyl-Prolyl Cis-Trans Isomerase a from Mycobacterium Tuberculosis

Henriksson, L.M., Johansson, P., Unge, T., Mowbray, S.L.

(2004) Eur J Biochem 271: 4107

• PubMed: 15479239 
• DOI: 10.1111/j.1432-1033.2004.04348.x
• Structures With Same Primary Citation


• PubMed Abstract: 
  

Peptidyl-prolyl cis-trans isomerases (EC 5.2.1.8) catalyse the interconversion of cis and trans peptide bonds and are therefore considered to be important for protein folding. They are also thought to participate in processes such as signalling, cell surface recognition, chaperoning and heat-shock response. Here we report the soluble expression of recombinant Mycobacterium tuberculosis peptidyl-prolyl cis-trans isomerase PpiA in Escherichia coli, together with an investigation of its structure and biochemical properties. The protein was shown to be active in a spectrophotometric assay, with an estimated kcat/Km of 2.0 x 10(6) m(-1).s(-1). The X-ray structure of PpiA was solved by molecular replacement, and refined to a resolution of 2.6 A with R and Rfree values of 21.3% and 22.9%, respectively. Comparisons to known structures show that the PpiA represents a slight variation on the peptidyl-prolyl cis-trans isomerase fold, previously not represented in the Protein Data Bank. Inspection of the active site suggests that specificity for substrates and cyclosporin A will be similar to that found for most other enzymes of this structural family. Comparison to the sequence of the second M. tuberculosis enzyme, PpiB, suggests that binding of peptide substrates as well as cyclosporin A may differ in that case.

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Organizational Affiliation: 

Department of Cell and Molecular Biology, Uppsala University, Sweden.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
PEPTIDYL-PROLYL CIS-TRANS ISOMERASE A	A, B	191	Mycobacterium tuberculosis H37Rv	Mutation(s): 0  Gene Names: ppiA, Rv0009, MTCY10H4.08 EC: 5.2.1.8
Find proteins for P9WHW3 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)) Go to UniProtKB:  P9WHW3

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Free: 0.229 
• R-Value Work: 0.212 
• R-Value Observed: 0.213 
• Space Group: P 3₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 65.349	α = 90
b = 65.349	β = 90
c = 102.493	γ = 120

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2004-08-27 
• Released Date: 2004-10-20 
Deposition Author(s): Henriksson, L.M., Johansson, P., Unge, T., Mowbray, S.L.

Revision History 

• Version 1.0: 2004-10-20
  Type: Initial release
  
• Version 1.1: 2011-05-08
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance