5tc2

X-ray diffraction
1.84Å resolution

C-terminal domain of HIV-1 integrase, crystal structure

Released:
Entry authors: Tsirkone VG, Strelkov SV

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:
Biological process:
  • not assigned
Cellular component:
  • not assigned

Structure analysis Details

Assembly composition:
homo dimer (preferred)
Assembly name:
PDBe Complex ID:
PDB-CPX-138017 (preferred)
Entry contents:
1 distinct polypeptide molecule
Macromolecule:
Integrase Chains: A, B
Molecule details ›
Chains: A, B
Length: 56 amino acids
Theoretical weight: 6.55 KDa
Source organism: Human immunodeficiency virus 1
Expression system: Escherichia coli K-12
UniProt:
  • Canonical: P04585 (Residues: 1366-1420; Coverage: 4%)
Gene name: gag-pol
Sequence domains: Integrase DNA binding domain
Structure domains: Integrase, C-terminal domain superfamily, retroviral

Ligands and Environments

1 bound ligand:
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: SOLEIL BEAMLINE PROXIMA 1
Spacegroup: P21
Unit cell:
a: 25.139Å b: 72.618Å c: 33.893Å
α: 90° β: 106.39° γ: 90°
R-values:
R R work R free
0.219 0.218 0.24
Expression system: Escherichia coli K-12