1sip

X-ray diffraction
2.3Å resolution

ALTERNATIVE NATIVE FLAP CONFORMATION REVEALED BY 2.3 ANGSTROMS RESOLUTION STRUCTURE OF SIV PROTEINASE

Released:

Function and Biology Details

Reactions catalysed:
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.
Biological process:
Cellular component:
  • not assigned

Structure analysis Details

Assembly composition:
homo dimer (preferred)
PDBe Complex ID:
PDB-CPX-183402 (preferred)
Entry contents:
1 distinct polypeptide molecule
Macromolecule:
UNLIGANDED SIV PROTEASE Chain: A
Molecule details ›
Chain: A
Length: 99 amino acids
Theoretical weight: 10.79 KDa
Source organism: Simian immunodeficiency virus
Expression system: Not provided
UniProt:
  • Canonical: Q88016 (Residues: 110-208; Coverage: 9%)
Gene name: pol
Sequence domains: Retroviral aspartyl protease
Structure domains: Acid Proteases

Ligands and Environments

No bound ligands
No modified residues

Experiments and Validation Details

Entry percentile scores
Spacegroup: C2221
Unit cell:
a: 32.18Å b: 62.52Å c: 95.76Å
α: 90° β: 90° γ: 90°
R-values:
R R work R free
0.17 not available not available
Expression system: Not provided