PDBe 6cqr

X-ray diffraction
3.04Å resolution

Crystal structure of F24 TCR -DR1-RQ13 peptide complex

Released:
Source organisms:
Primary publication:
CD4
Sci Immunol 3 (2018)
PMID: 29884618

Function and Biology Details

Reactions catalysed:
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.
Deoxynucleoside triphosphate + DNA(n) = diphosphate + DNA(n+1)
Specific for a P1 residue that is hydrophobic, and P1' variable, but often Pro.
3'-end directed exonucleolytic cleavage of viral RNA-DNA hybrid
Biochemical function:
  • not assigned
Biological process:
Cellular component:

Structure analysis Details

Assembly composition:
hetero pentamer (preferred)
Entry contents:
5 distinct polypeptide molecules
Macromolecules (5 distinct):
HLA class II histocompatibility antigen, DR alpha chain Chains: A, F
Molecule details ›
Chains: A, F
Length: 182 amino acids
Theoretical weight: 21.19 KDa
Source organism: Homo sapiens
Expression system: Homo sapiens
UniProt:
  • Canonical: P01903 (Residues: 26-207; Coverage: 80%)
Gene names: HLA-DRA, HLA-DRA1
Sequence domains:
HLA class II histocompatibility antigen, DRB1-1 beta chain Chains: B, G
Molecule details ›
Chains: B, G
Length: 190 amino acids
Theoretical weight: 22.08 KDa
Source organism: Homo sapiens
Expression system: Homo sapiens
UniProt:
  • Canonical: P04229 (Residues: 30-219; Coverage: 80%)
Gene name: HLA-DRB1
Sequence domains:
Capsid protein p24 Chains: C, H
Molecule details ›
Chains: C, H
Length: 13 amino acids
Theoretical weight: 1.6 KDa
Source organism: HIV-1 M:B_HXB2R
Expression system: Not provided
UniProt:
  • Canonical: P04585 (Residues: 299-311; Coverage: 1%)
Gene name: gag-pol
T cell receptor alpha variable 24 Chains: D, I
Molecule details ›
Chains: D, I
Length: 205 amino acids
Theoretical weight: 22.8 KDa
Source organism: Homo sapiens
Expression system: Homo sapiens
UniProt:
  • Canonical: A0A0B4J272 (Residues: 23-114; Coverage: 100%)
Gene name: TRAV24
Sequence domains: Immunoglobulin V-set domain
T cell receptor beta constant 2 Chains: E, J
Molecule details ›
Chains: E, J
Length: 245 amino acids
Theoretical weight: 28.08 KDa
Source organism: Homo sapiens
Expression system: Homo sapiens
UniProt:
  • Canonical: A0A5B9 (Residues: 1-129; Coverage: 73%)
Gene names: TCRBC2, TRBC2
Sequence domains: Immunoglobulin C1-set domain

Ligands and Environments

1 bound ligand:

No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: AUSTRALIAN SYNCHROTRON BEAMLINE MX2
Spacegroup: P21212
Unit cell:
a: 133.929Å b: 155.325Å c: 133.14Å
α: 90° β: 90° γ: 90°
R-values:
R R work R free
0.224 0.223 0.254
Expression systems:
  • Homo sapiens
  • Not provided