Biological Assembly 1  

 3D View: Structure | Electron Density

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

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

Macromolecule Content

• Total Structure Weight: 18.02 kDa 
• Atom Count: 1526 
• Modelled Residue Count: 164 
• Deposited Residue Count: 165 
• Unique protein chains: 1

2WLW

Structure of the N-terminal capsid domain of HIV-2

• DOI: 10.2210/pdb2WLW/pdb

• Classification: ISOMERASE
• Organism(s): Macaca mulatta
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2009-06-26 Released: 2009-09-22 
• Deposition Author(s): Price, A.J., Marzetta, F., Lammers, M., Ylinen, L.M.J., Schaller, T., Wilson, S.J., Towers, G.J., James, L.C.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.50 Å
• R-Value Free: 0.186 
• R-Value Work: 0.154 
• R-Value Observed: 0.156 

Literature

Active Site Remodelling Switches HIV Specificity of Antiretroviral Trimcyp

Price, A.J., Marzetta, F., Lammers, M., Ylinen, L.M.J., Schaller, T., Wilson, S.J., Towers, G.J., James, L.C.

(2009) Nat Struct Mol Biol 16: 1036

• PubMed: 19767750 
• DOI: 10.1038/nsmb.1667
• Primary Citation of Related Structures:  
  2WLW, 2WLV


• PubMed Abstract: 
  

TRIMCyps are primate antiretroviral proteins that potently inhibit HIV replication. Here we describe how rhesus macaque TRIMCyp (RhTC) has evolved to target and restrict HIV-2. We show that the ancestral cyclophilin A (CypA) domain of RhTC targets HIV-2 capsid with weak affinity, which is strongly increased in RhTC by two mutations (D66N and R69H) at the expense of HIV-1 binding. These mutations disrupt a constraining intramolecular interaction in CypA, triggering the complete restructuring (>16 A) of an active site loop. This new configuration discriminates between divergent HIV-1 and HIV-2 loop conformations mediated by capsid residue 88. Viral sensitivity to RhTC restriction can be conferred or abolished by mutating position 88. Furthermore, position 88 determines the susceptibility of naturally occurring HIV-1 sequences to restriction. Our results reveal the complex molecular, structural and thermodynamic changes that underlie the ongoing evolutionary race between virus and host.

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Organizational Affiliation: 

Protein and Nucleic Acid Chemistry Division, Medical Research Council Laboratory of Molecular Biology, Cambridge, UK.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PEPTIDYL-PROLYL CIS-TRANS ISOMERASE	A	165	Macaca mulatta	Mutation(s): 0  Gene Names: PPIA, CYPA EC: 5.2.1.8
Find proteins for P62940 (Macaca mulatta) Explore P62940  Go to UniProtKB:  P62940

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.50 Å
• R-Value Free: 0.186 
• R-Value Work: 0.154 
• R-Value Observed: 0.156 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 35.88	α = 90
b = 51.12	β = 90
c = 75.18	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2009-06-26 
• Released Date: 2009-09-22 
Deposition Author(s): Price, A.J., Marzetta, F., Lammers, M., Ylinen, L.M.J., Schaller, T., Wilson, S.J., Towers, G.J., James, L.C.

Revision History  

• Version 1.0: 2009-09-22
  Type: Initial release
  
• Version 1.1: 2011-06-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance