1AWT

SECYPA COMPLEXED WITH HAGPIA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.55 Å
  • R-Value Free: 0.465 
  • R-Value Work: 0.378 
  • R-Value Observed: 0.378 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Crystal structure of cyclophilin A complexed with a binding site peptide from the HIV-1 capsid protein.

Vajdos, F.F.Yoo, S.Houseweart, M.Sundquist, W.I.Hill, C.P.

(1997) Protein Sci 6: 2297-2307

  • DOI: https://doi.org/10.1002/pro.5560061103
  • Primary Citation of Related Structures:  
    1AWQ, 1AWR, 1AWS, 1AWT, 1AWU, 1AWV

  • PubMed Abstract: 

    The cellular protein, cyclophilin A (CypA), is incorporated into the virion of the type 1 human immunodeficiency virus (HIV-1) via a direct interaction with the capsid domain of the viral Gag polyprotein. We demonstrate that the capsid sequence 87His-Ala-Gly-Pro-Ile-Ala92 (87HAGPIA92) encompasses the primary cyclophilin A binding site and present an X-ray crystal structure of the CypA/HAGPIA complex. In contrast to the cis prolines observed in all previously reported structures of CypA complexed with model peptides, the proline in this peptide, Pro 90, binds the cyclophilin A active site in a trans conformation. We also report the crystal structure of a complex between CypA and the hexapeptide HVGPIA, which also maintains the trans conformation. Comparison with the recently determined structures of CypA in complexes with larger fragments of the HIV-1 capsid protein demonstrates that CypA recognition of these hexapeptides involves contacts with peptide residues Ala(Val) 88, Gly 89, and Pro 90, and is independent of the context of longer sequences.


  • Organizational Affiliation

    Department of Biochemistry, University of Utah, Salt Lake City 84132, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
CYCLOPHILIN A
A, B, C, D, E
A, B, C, D, E, F
164Homo sapiensMutation(s): 4 
Gene Names: CYCLOPHILIN
EC: 5.2.1.8
UniProt & NIH Common Fund Data Resources
Find proteins for P62937 (Homo sapiens)
Explore P62937 
Go to UniProtKB:  P62937
PHAROS:  P62937
GTEx:  ENSG00000196262 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP62937
Sequence Annotations
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  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
PEPTIDE FROM THE HIV-1 CAPSID PROTEIN
G, H, I, J, K
G, H, I, J, K, L
6N/AMutation(s): 0 
Sequence Annotations
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
MSE
Query on MSE
A, B, C, D, E
A, B, C, D, E, F
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.55 Å
  • R-Value Free: 0.465 
  • R-Value Work: 0.378 
  • R-Value Observed: 0.378 
  • Space Group: P 41
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 73.2α = 90
b = 73.2β = 90
c = 189.6γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
DENZOdata reduction
SCALEPACKdata scaling
X-PLORphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Released Date: 1998-03-18 
  • Deposition Author(s): Vajdos, F.F.

Revision History  (Full details and data files)

  • Version 1.0: 1998-03-18
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance