6hak

X-ray diffraction
3.95Å resolution

Crystal structure of HIV-1 reverse transcriptase (RT) in complex with a double stranded RNA represents the RT transcription initiation complex prior to nucleotide incorporation

Released:
Primary publication:
Structure of HIV-1 RT/dsRNA initiation complex prior to nucleotide incorporation.
Proc Natl Acad Sci U S A 116 7308-7313 (2019)
PMID: 30902895

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)
Assembly name:
PDBe Complex ID:
PDB-CPX-136842 (preferred)
Entry contents:
2 distinct polypeptide molecules
2 distinct RNA molecules
Macromolecules (5 distinct):
Reverse transcriptase/ribonuclease H Chains: A, C
Molecule details ›
Chains: A, C
Length: 556 amino acids
Theoretical weight: 64.02 KDa
Source organism: Human immunodeficiency virus type 1 BH10
Expression system: Escherichia coli
UniProt:
  • Canonical: P03366 (Residues: 600-1153; Coverage: 38%)
Gene name: gag-pol
Sequence domains:
p51 RT Chains: B, D
Molecule details ›
Chains: B, D
Length: 444 amino acids
Theoretical weight: 51.93 KDa
Source organism: Human immunodeficiency virus type 1 BH10
Expression system: Escherichia coli
UniProt:
  • Canonical: P03366 (Residues: 600-1027; Coverage: 30%)
Gene name: gag-pol
Sequence domains:
RNA (5'-R(P*AP*GP*UP*GP*GP*CP*GP*GP*CP*CP*GP*AP*AP*CP*AP*GP*GP*GP*AP*C)-3') Chains: E, T
Molecule details ›
Chains: E, T
Length: 23 nucleotides
Theoretical weight: 7.52 KDa
RNA (5'-R(P*UP*CP*CP*CP*UP*GP*UP*UP*CP*GP*GP*CP*CP*GP*CP*CP*A)-3') Chains: F, P
Molecule details ›
Chains: F, P
Length: 17 nucleotides
Theoretical weight: 5.33 KDa

Ligands and Environments

Carbohydrate polymer : NEW Components: GLC, FRU
1 bound ligand:
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: CHESS BEAMLINE F1
Spacegroup: P43212
Unit cell:
a: 175.24Å b: 175.24Å c: 225.8Å
α: 90° β: 90° γ: 90°
R-values:
R R work R free
0.296 0.293 0.329
Expression system: Escherichia coli