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 

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:  

  • 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 ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CYCLOPHILIN A
A, B, C, D, E, F
164Homo sapiensMutation(s): 0 
Gene Names: PPIA (CYPA)
EC: 5.2.1.8
Find proteins for P62937 (Homo sapiens)
Go to Gene View: PPIA
Go to UniProtKB:  P62937
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
PEPTIDE FROM THE HIV-1 CAPSID PROTEIN
G, H, I, J, K, L
6N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
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 
  • Space Group: P 41
Unit Cell:
Length (Å)Angle (°)
a = 73.200α = 90.00
b = 73.200β = 90.00
c = 189.600γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
X-PLORphasing
X-PLORrefinement
DENZOdata reduction
X-PLORmodel building

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

  • Deposited Date: 1997-10-05 
  • Released Date: 1998-03-18 
  • Deposition Author(s): Vajdos, F.F.

Revision History 

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