Biological Assembly 1  

 3D View: Structure | Electron Density

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 generated by PISA (software)

Biological Assembly 2  

 3D View: Structure | Electron Density

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 2 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 65.15 kDa 
• Atom Count: 4984 
• Residue Count: 580 
• Unique protein chains: 1

2X82

Evolutionary basis of HIV restriction by the antiretroviral TRIMCyp

• DOI: 10.2210/pdb2X82/pdb

• Classification: VIRAL PROTEIN
• Organism(s): Human immunodeficiency virus type 2 (ISOLATE D194)
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2010-03-05 Released: 2010-09-15 
• Deposition Author(s): Price, A.J., James, L.C.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Free: 0.280 
• R-Value Work: 0.215 
• R-Value Observed: 0.219 

Literature

Conformational Adaptation of Asian Macaque Trimcyp Directs Lineage Specific Antiviral Activity.

Ylinen, L.M., Price, A.J., Rasaiyaah, J., Hue, S., Rose, N.J., Marzetta, F., James, L.C., Towers, G.J.

(2010) PLoS Pathog 6: 1062

• PubMed: 20808866 
• DOI: 10.1371/journal.ppat.1001062
• Primary Citation of Related Structures:  
  2X82, 2X83


• PubMed Abstract: 
  

TRIMCyps are anti-retroviral proteins that have arisen independently in New World and Old World primates. All TRIMCyps comprise a CypA domain fused to the tripartite domains of TRIM5alpha but they have distinct lentiviral specificities, conferring HIV-1 restriction in New World owl monkeys and HIV-2 restriction in Old World rhesus macaques. Here we provide evidence that Asian macaque TRIMCyps have acquired changes that switch restriction specificity between different lentiviral lineages, resulting in species-specific alleles that target different viruses. Structural, thermodynamic and viral restriction analysis suggests that a single mutation in the Cyp domain, R69H, occurred early in macaque TRIMCyp evolution, expanding restriction specificity to the lentiviral lineages found in African green monkeys, sooty mangabeys and chimpanzees. Subsequent mutations have enhanced restriction to particular viruses but at the cost of broad specificity. We reveal how specificity is altered by a scaffold mutation, E143K, that modifies surface electrostatics and propagates conformational changes into the active site. Our results suggest that lentiviruses may have been important pathogens in Asian macaques despite the fact that there are no reported lentiviral infections in current macaque populations.

---

Organizational Affiliation: 

University College London Medical Research Council Centre for Medical Molecular Virology, London, UK.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CAPSID PROTEIN P24	A, B, C, D	145	Human immunodeficiency virus type 2 (ISOLATE D194)	Mutation(s): 0

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Free: 0.280 
• R-Value Work: 0.215 
• R-Value Observed: 0.219 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 47.47	α = 90
b = 116.77	β = 90
c = 129.36	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2010-03-05 
• Released Date: 2010-09-15 
Deposition Author(s): Price, A.J., James, L.C.

Revision History 

• Version 1.0: 2010-09-15
  Type: Initial release
  
• Version 1.1: 2011-05-08
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance