Biological Assembly 1  

 3D View: Structure

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 18.04 kDa 
• Atom Count: 1265 
• Modelled Residue Count: 165 
• Deposited Residue Count: 165 
• Unique protein chains: 1

2N0T

Structural ensemble of the enzyme cyclophilin reveals an orchestrated mode of action at atomic resolution

• DOI: 10.2210/pdb2N0T/pdb

• Classification: ISOMERASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2015-03-13 Released: 2015-08-26 
• Deposition Author(s): Chi, C.N., Voegeli, B., Bibow, S., Strotz, D., Orts, J., Guntert, P., Riek, R.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 40 
• Selection Criteria: structures with the lowest energy 

Literature

A Structural Ensemble for the Enzyme Cyclophilin Reveals an Orchestrated Mode of Action at Atomic Resolution.

Chi, C.N., Vogeli, B., Bibow, S., Strotz, D., Orts, J., Guntert, P., Riek, R.

(2015) Angew Chem Int Ed Engl 54: 11657-11661

• PubMed: 26265096 
• DOI: 10.1002/anie.201503698
• Primary Citation of Related Structures:  
  2N0T


• PubMed Abstract: 
  

For enzyme activity, an exact structural and motional orchestration of the active site and its surroundings is believed to be key. In order to reveal such possible phenomena at atomic resolution on the basis of experimental evidence, an experimental restraint driven two-state ensemble of the prototypical enzyme cyclophilin was determined by using a recently introduced exact NOE approach. The ensemble description reveals the presence of an open and a closed state of cyclophilin, which is indicative of large-scale correlated motion. In the open state, the catalytic site is preorganized for catalysis, thus suggesting the mechanism of action to be conformational sampling, while the ligand-binding loop appears to act through an induced fit mechanism. This finding is supported by affinity measurements of a cyclophilin designed to be more open. Overall, more than 60-70 % of the side-chain conformations of cyclophilin appear to be correlated.

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Organizational Affiliation: 

Laboratory of Physical Chemistry, ETH Zurich, ETH-Hönggerberg, 8093 Zürich (Switzerland). [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Peptidyl-prolyl cis-trans isomerase A	A	165	Homo sapiens	Mutation(s): 0  Gene Names: PPIA, CYPA EC: 5.2.1.8
Find proteins for P62937 (Homo sapiens) Explore P62937  Go to UniProtKB:  P62937
NIH Common Fund Data Resources
PHAROS:  P62937 GTEx:  ENSG00000196262

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 40 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 2N0T Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2015-03-13 
• Released Date: 2015-08-26 
Deposition Author(s): Chi, C.N., Voegeli, B., Bibow, S., Strotz, D., Orts, J., Guntert, P., Riek, R.

Revision History  

• Version 1.0: 2015-08-26
  Type: Initial release
  
• Version 1.1: 2015-10-14
  Changes: Database references