X-ray diffraction
2.9Å resolution

Crystal structure of a human Valpha7.2/Vbeta13.3 MAIT TCR in complex with bovine MR1


Function and Biology Details

Structure analysis Details

Assembly composition:
hetero trimer (preferred)
Entry contents:
3 distinct polypeptide molecules
Macromolecules (3 distinct):
Ig-like domain-containing protein Chain: A
Molecule details ›
Chain: A
Length: 208 amino acids
Theoretical weight: 23.15 KDa
Source organism: Homo sapiens
Expression system: Escherichia coli
  • Canonical: Q6P4G7 (Residues: 5-213; Coverage: 79%)
Gene name: TRA@
Sequence domains:
Structure domains: Immunoglobulins
Muccosal Associated Invariant T Cell Receptor beta chain Chain: B
Molecule details ›
Chain: B
Length: 252 amino acids
Theoretical weight: 28.23 KDa
Source organism: Homo sapiens
Expression system: Escherichia coli
Structure domains: Immunoglobulins
Beta-2-microglobulin; Major histocompatibility complex class I-related gene protein Chain: C
Molecule details ›
Chain: C
Length: 392 amino acids
Theoretical weight: 45.42 KDa
Source organism: Bos taurus
Expression system: Trichoplusia ni
  • Canonical: C1ITJ8 (Residues: 19-295; Coverage: 87%)
  • Canonical: P01888 (Residues: 21-118; Coverage: 100%)
Gene names: B2M, MR1
Sequence domains:
Structure domains:

Ligands and Environments

1 bound ligand:
1 modified residue:

Experiments and Validation Details

Entry percentile scores
X-ray source: APS BEAMLINE 23-ID-B
Spacegroup: P212121
Unit cell:
a: 83.068Å b: 87.285Å c: 155.817Å
α: 90° β: 90° γ: 90°
R R work R free
0.23 0.228 0.278
Expression systems:
  • Escherichia coli
  • Trichoplusia ni