1FGL

Cyclophilin A complexed with a fragment of HIV-1 GAG protein

• PDB DOI: https://doi.org/10.2210/pdb1FGL/pdb

• Classification: ISOMERASE/VIRAL PROTEIN
• Organism(s): Homo sapiens, Human immunodeficiency virus type 1 (WMJ2 ISOLATE)
• Expression System: Escherichia coli, Homo sapiens
• Mutation(s): No 


• Deposited: 1996-11-18 Released: 1997-04-01 
• Deposition Author(s): Zhao, Y., Chen, Y., Schutkowski, M., Fischer, G., Ke, H.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.256 
• R-Value Work: 0.195 
• R-Value Observed: 0.195 

Literature

Cyclophilin A complexed with a fragment of HIV-1 gag protein: insights into HIV-1 infectious activity.

Zhao, Y., Chen, Y., Schutkowski, M., Fischer, G., Ke, H.

(1997) Structure 5: 139-146

• PubMed: 9016720 
• DOI: https://doi.org/10.1016/s0969-2126(97)00172-x
• Primary Citation of Related Structures:  
  1FGL


• PubMed Abstract: 
  

  Cyclophilin A (CyPA), a receptor of the immunosuppressive drug cyclosporin A, catalyzes the cis-trans isomerization of peptidyl-prolyl bonds and is required for the infectious activity of human immunodeficiency virus type 1 (HIV-1). The crystal structure of CyPA complexed with a fragment of the HIV-1 gag protein should provide insights into the nature of CyPA-gag interactions and may suggest a role for CyPA in HIV-1 infectious activity.

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Organizational Affiliation: 

Department of Biochemistry and Biophysics, School of Medicine, The University of North Carolina, Chapel Hill, NC 27599, USA.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 20.66 kDa 
• Atom Count: 1,440 
• Modelled Residue Count: 177 
• Deposited Residue Count: 190 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CYCLOPHILIN A	A	165	Homo sapiens	Mutation(s): 0  Gene Names: CYCLOPHILIN A
UniProt & NIH Common Fund Data Resources
Find proteins for P62937 (Homo sapiens) Explore P62937  Go to UniProtKB:  P62937
PHAROS:  P62937 GTEx:  ENSG00000196262

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
HIV-1 GAG PROTEIN	B	25	Human immunodeficiency virus type 1 (WMJ2 ISOLATE)	Mutation(s): 0  Gene Names: gag EC: 5.2.1.8
UniProt
Find proteins for P05889 (Human immunodeficiency virus type 1 group M subtype B (isolate WMJ22)) Explore P05889  Go to UniProtKB:  P05889

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
NLE	B	L-PEPTIDE LINKING	C6 H13 N O2		LEU

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.256 
• R-Value Work: 0.195 
• R-Value Observed: 0.195 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 44.3	α = 90
b = 53.1	β = 90
c = 68.5	γ = 90

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Released Date: 1997-04-01 
Deposition Author(s): Zhao, Y., Chen, Y., Schutkowski, M., Fischer, G., Ke, H.

Revision History  

• Version 1.0: 1997-04-01
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Non-polymer description, Version format compliance
• Version 1.3: 2017-11-29
  Changes: Derived calculations, Other