6bsi

X-ray diffraction
3.25Å resolution

Structure of HIV-1 RT complexed with an RNA/DNA hybrid containing the polypurine-tract sequence

Released:
Primary publication:
Structure of HIV-1 reverse transcriptase cleaving RNA in an RNA/DNA hybrid.
Proc Natl Acad Sci U S A 115 507-512 (2018)
PMID: 29295939

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.
Cellular component:
  • not assigned

Structure analysis Details

Assembly composition:
hetero tetramer (preferred)
PDBe Complex ID:
PDB-CPX-119630 (preferred)
Entry contents:
2 distinct polypeptide molecules
1 distinct DNA molecule
1 distinct RNA molecule
Macromolecules (4 distinct):
Reverse transcriptase/ribonuclease H Chain: A
Molecule details ›
Chain: A
Length: 558 amino acids
Theoretical weight: 64.13 KDa
Source organism: Human immunodeficiency virus 1
Expression system: Escherichia coli
UniProt:
  • Canonical: P04585 (Residues: 588-1144; Coverage: 39%)
Gene name: gag-pol
Sequence domains:
p51 RT Chain: B
Molecule details ›
Chain: B
Length: 441 amino acids
Theoretical weight: 51.38 KDa
Source organism: Human immunodeficiency virus 1
Expression system: Escherichia coli
UniProt:
  • Canonical: P04585 (Residues: 588-1027; Coverage: 31%)
Gene name: gag-pol
Sequence domains:
DNA (5'-D(*GP*TP*TP*TP*TP*TP*CP*TP*TP*TP*TP*GP*TP*TP*AP*TP*TP*GP*TP*GP*GP*CP*C)-3') Chain: D
Molecule details ›
Chain: D
Length: 23 nucleotides
Theoretical weight: 7.04 KDa
RNA (25-MER) Chain: R
Molecule details ›
Chain: R
Length: 25 nucleotides
Theoretical weight: 7.98 KDa

Ligands and Environments

3 bound ligands:
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: APS BEAMLINE 22-BM
Spacegroup: P3121
Unit cell:
a: 163.85Å b: 163.85Å c: 129.57Å
α: 90° β: 90° γ: 120°
R-values:
R R work R free
0.195 0.193 0.241
Expression system: Escherichia coli