Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 18.60 kDa 
• Atom Count: 1403 
• Residue Count: 153 
• Unique protein chains: 1

2F21

human Pin1 Fip mutant

• DOI: 10.2210/pdb2F21/pdb

• Classification: ISOMERASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2005-11-15 Released: 2006-06-20 
• Deposition Author(s): Jager, M., Zhang, Y., Bowman, M.E., Noel, J.P., Kelly, J.W.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.50 Å
• R-Value Free: 0.248 
• R-Value Work: 0.226 
• R-Value Observed: 0.227 

Literature

Structure-function-folding relationship in a WW domain.

Jager, M., Zhang, Y., Bieschke, J., Nguyen, H., Dendle, M., Bowman, M.E., Noel, J.P., Gruebele, M., Kelly, J.W.

(2006) Proc Natl Acad Sci U S A 103: 10648-10653

• PubMed: 16807295 
• DOI: 10.1073/pnas.0600511103
• Structures With Same Primary Citation


• PubMed Abstract: 
  

Protein folding barriers result from a combination of factors including unavoidable energetic frustration from nonnative interactions, natural variation and selection of the amino acid sequence for function, and/or selection pressure against aggregation. The rate-limiting step for human Pin1 WW domain folding is the formation of the loop 1 substructure. The native conformation of this six-residue loop positions side chains that are important for mediating protein-protein interactions through the binding of Pro-rich sequences. Replacement of the wild-type loop 1 primary structure by shorter sequences with a high propensity to fold into a type-I' beta-turn conformation or the statistically preferred type-I G1 bulge conformation accelerates WW domain folding by almost an order of magnitude and increases thermodynamic stability. However, loop engineering to optimize folding energetics has a significant downside: it effectively eliminates WW domain function according to ligand-binding studies. The energetic contribution of loop 1 to ligand binding appears to have evolved at the expense of fast folding and additional protein stability. Thus, the two-state barrier exhibited by the wild-type human Pin1 WW domain principally results from functional requirements, rather than from physical constraints inherent to even the most efficient loop formation process.

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Organizational Affiliation: 

Department of Chemistry and The Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, BCC265, La Jolla, CA 92037, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1	A	162	Homo sapiens	Mutation(s): 2  Gene Names: PIN1 EC: 5.2.1.8
Find proteins for Q13526 (Homo sapiens) Go to UniProtKB:  Q13526
NIH Common Fund Data Resources
PHAROS  Q13526 GTEx  ENSG00000127445

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
1PE	A	PENTAETHYLENE GLYCOL C10 H22 O6 JLFNLZLINWHATN-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.50 Å
• R-Value Free: 0.248 
• R-Value Work: 0.226 
• R-Value Observed: 0.227 
• Space Group: P 4₃ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 49.012	α = 90
b = 49.012	β = 90
c = 135.278	γ = 90

Software Package:

Software Name	Purpose
HKL-2000	data collection
SCALEPACK	data scaling
AMoRE	phasing
CNS	refinement
HKL-2000	data reduction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2005-11-15 
• Released Date: 2006-06-20 
Deposition Author(s): Jager, M., Zhang, Y., Bowman, M.E., Noel, J.P., Kelly, J.W.

Revision History 

• Version 1.0: 2006-06-20
  Type: Initial release
  
• Version 1.1: 2008-05-01
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance