1k6y

X-ray diffraction
2.4Å resolution

Crystal Structure of a Two-Domain Fragment of HIV-1 Integrase

Released:

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:
Cellular component:
  • not assigned

Structure analysis Details

Assemblies composition:
homo tetramer
homo dimer (preferred)
Assembly name:
PDBe Complex ID:
PDB-CPX-146209 (preferred)
Entry contents:
1 distinct polypeptide molecule
Macromolecule:
Integrase Chains: A, B, C, D
Molecule details ›
Chains: A, B, C, D
Length: 212 amino acids
Theoretical weight: 23.32 KDa
Source organism: Human immunodeficiency virus 1
Expression system: Escherichia coli
UniProt:
  • Canonical: P12497 (Residues: 1148-1359; Coverage: 15%)
Gene name: gag-pol
Sequence domains:
Structure domains:

Ligands and Environments

3 bound ligands:
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: NSLS BEAMLINE X9B
Spacegroup: P43212
Unit cell:
a: 102.71Å b: 102.71Å c: 280.56Å
α: 90° β: 90° γ: 90°
R-values:
R R work R free
0.233 0.233 0.26
Expression system: Escherichia coli