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: 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 ...

    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
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(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CYCLOPHILIN A
A, B, C, D, E, F
A, B, C, D, E, F
164Homo sapiensMutation(s): 4 
Gene Names: CYCLOPHILIN, PPIA, CYPA
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
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP62937
Protein Feature View
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  • Reference Sequence

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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
PEPTIDE FROM THE HIV-1 CAPSID PROTEIN
G, H, I, J, K, L
G, H, I, J, K, L
6N/AMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B, C, D, E, F
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

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Entry History 

Deposition Data

  • Deposited Date: 1997-10-05 
  • 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