2NUL | pdb_00002nul

PEPTIDYLPROLYL ISOMERASE FROM E. COLI

• PDB DOI: https://doi.org/10.2210/pdb2NUL/pdb

• Classification: ISOMERASE
• Organism(s): Escherichia coli
• Mutation(s): No 


• Deposited: 1996-11-14 Released: 1997-11-19 
• Deposition Author(s): Edwards, K.J., Ollis, D.L.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Work: 
  0.160 (Depositor), 0.157 (DCC) 
• R-Value Observed: 
  0.160 (Depositor) 

Starting Model: experimental

Literature

Crystal structure of cytoplasmic Escherichia coli peptidyl-prolyl isomerase: evidence for decreased mobility of loops upon complexation.

Edwards, K.J., Ollis, D.L., Dixon, N.E.

(1997) J Mol Biology 271: 258-265

• PubMed: 9268657 
• DOI: https://doi.org/10.1006/jmbi.1997.1151
• Primary Citation Related Structures: 
  2NUL


• PubMed Abstract: 
  

  The structure of the unliganded form of the Escherichia coli cytoplasmic peptidyl-prolyl isomerase (ppiB gene product) in a new crystal form was determined by the molecular replacement method and refined to an R-factor of 16.1% at 2.1 A resolution. The enzyme crystallized in the orthorhombic C2221 space group with unit cell dimensions of a=44.7 A, b=68.2 A and c=102.0 A. Comparison with the reported structure of the enzyme complexed with the tripeptide substrate succinyl-Ala-Pro-Ala-p-nitroanilide revealed subtle changes that occur upon complex formation. There is evidence to suggest that two surface loops have significantly reduced mobility in the complexed structure.

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Organizational Affiliation: 
• Research School of Chemistry, Australian National University, Canberra, ACT 0200, Australia.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 18.17 kDa 
• Atom Count: 1,306 
• Modeled Residue Count: 163 
• Deposited Residue Count: 164 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PEPTIDYLPROLYL ISOMERASE	A	164	Escherichia coli	Mutation(s): 0  EC: 5.2.1.8
UniProt
Find proteins for P23869 (Escherichia coli (strain K12)) Explore P23869  Go to UniProtKB:  P23869

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Work:  0.160 (Depositor), 0.157 (DCC) 
• R-Value Observed: 0.160 (Depositor) 

Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 44.7	α = 90
b = 68.2	β = 90
c = 102	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
RIGAKU	data reduction
RIGAKU	data scaling
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1997-11-19 
Deposition Author(s): Edwards, K.J., Ollis, D.L.

Revision History  

• Version 1.0: 1997-11-19
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2011-11-16
  Changes: Atomic model
• Version 2.0: 2023-08-09
  Changes: Atomic model, Database references, Derived calculations, Other, Refinement description
• Version 2.1: 2024-05-22
  Changes: Data collection