3p05

X-ray diffraction
2.5Å resolution

X-ray structure of pentameric HIV-1 CA

Released:
Primary publication:
Atomic-level modelling of the HIV capsid.
Nature 469 424-7 (2011)
PMID: 21248851

Function and Biology Details

Reactions catalysed:
Deoxynucleoside triphosphate + DNA(n) = diphosphate + DNA(n+1)
3'-end directed exonucleolytic cleavage of viral RNA-DNA hybrid
Endohydrolysis of RNA in RNA/DNA hybrids. Three different cleavage modes: 1. sequence-specific internal cleavage of RNA. Human immunodeficiency virus type 1 and Moloney murine leukemia virus enzymes prefer to cleave the RNA strand one nucleotide away from the RNA-DNA junction. 2. RNA 5'-end directed cleavage 13-19 nucleotides from the RNA end. 3. DNA 3'-end directed cleavage 15-20 nucleotides away from the primer terminus.
Specific for a P1 residue that is hydrophobic, and P1' variable, but often Pro.
Biochemical function:
  • not assigned
Biological process:
Cellular component:
  • not assigned

Structure analysis Details

Assembly composition:
homo pentamer (preferred)
Assembly name:
PDBe Complex ID:
PDB-CPX-146236 (preferred)
Entry contents:
1 distinct polypeptide molecule
Macromolecule:
Capsid protein p24 Chains: A, B, C, D, E
Molecule details ›
Chains: A, B, C, D, E
Length: 231 amino acids
Theoretical weight: 25.48 KDa
Source organism: Human immunodeficiency virus 1
Expression system: Escherichia coli BL21(DE3)
UniProt:
  • Canonical: P12497 (Residues: 133-363; Coverage: 16%)
Gene name: gag-pol
Sequence domains: Gag protein p24 C-terminal domain
Structure domains:

Ligands and Environments

1 bound ligand:
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: APS BEAMLINE 22-BM
Spacegroup: P21
Unit cell:
a: 58.723Å b: 130.308Å c: 81.831Å
α: 90° β: 97.37° γ: 90°
R-values:
R R work R free
0.232 0.23 0.266
Expression system: Escherichia coli BL21(DE3)