4NNR

FKBP13-FK506 Complex

• PDB DOI: https://doi.org/10.2210/pdb4NNR/pdb

• Classification: isomerase/isomerase inhibitor
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2013-11-18 Released: 2014-02-05 
• Deposition Author(s): Schultz, L.W., Martin, P.K., Liang, J., Schreiber, S.L., Clardy, J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.98 Å
• R-Value Free: 0.221 
• R-Value Work: 0.159 
• R-Value Observed: 0.159 

Literature

Atomic structure of the Immunophilin FKBP13-FK506 Complex: Insights into the Composite Binding Surface for Calcineurin

Schultz, L.W., Martin, P.K., Liang, J., Schreiber, S.L., Clardy, J.

(1994) J Am Chem Soc 116: 3129-3130

• DOI: https://doi.org/10.1021/ja00086a055

Biological Assembly 1  

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

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

Biological Assembly 2  

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

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

Macromolecule Content

• Total Structure Weight: 32.95 kDa 
• Atom Count: 1,800 
• Modelled Residue Count: 203 
• Deposited Residue Count: 284 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Peptidyl-prolyl cis-trans isomerase FKBP2	A, B	142	Homo sapiens	Mutation(s): 0  Gene Names: FKBP2, FKBP13 EC: 5.2.1.8
UniProt & NIH Common Fund Data Resources
Find proteins for P26885 (Homo sapiens) Explore P26885  Go to UniProtKB:  P26885
PHAROS:  P26885 GTEx:  ENSG00000173486

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
FK5	C [auth A], D [auth B]	8-DEETHYL-8-[BUT-3-ENYL]-ASCOMYCIN C44 H69 N O12 QJJXYPPXXYFBGM-LFZNUXCKSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.98 Å
• R-Value Free: 0.221 
• R-Value Work: 0.159 
• R-Value Observed: 0.159 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 74.26	α = 90
b = 74.06	β = 90
c = 39.24	γ = 90

Software Package:

Software Name	Purpose
SDMS	data collection
X-PLOR	model building
X-PLOR	refinement
SDMS	data reduction
SCALEPACK	data scaling
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2014-02-05 
Deposition Author(s): Schultz, L.W., Martin, P.K., Liang, J., Schreiber, S.L., Clardy, J.

Revision History  

• Version 1.0: 2014-02-05
  Type: Initial release
  
• Version 1.1: 2019-11-13
  Changes: Database references
• Version 1.2: 2024-11-20
  Changes: Data collection, Database references, Derived calculations, Structure summary