PDBe 1kpr

X-ray diffraction
2.8Å resolution

The human non-classical major histocompatibility complex molecule HLA-E

Released:

Function and Biology Details

Structure analysis Details

Assemblies composition:
hetero trimer (preferred)
hetero 12-mer
hetero hexamer
Entry contents:
3 distinct polypeptide molecules
Macromolecules (3 distinct):
Soluble HLA class I histocompatibility antigen, alpha chain E Chains: A, C
Molecule details ›
Chains: A, C
Length: 274 amino acids
Theoretical weight: 31.51 KDa
Source organism: Homo sapiens
Expression system: Escherichia coli
UniProt:
  • Canonical: P13747 (Residues: 22-295; Coverage: 81%)
Gene names: HLA-6.2, HLA-E, HLAE
Sequence domains:
Structure domains:
Beta-2-microglobulin Chains: B, D
Molecule details ›
Chains: B, D
Length: 100 amino acids
Theoretical weight: 11.88 KDa
Source organism: Homo sapiens
Expression system: Escherichia coli
UniProt:
  • Canonical: P61769 (Residues: 21-119; Coverage: 100%)
Gene names: B2M, CDABP0092, HDCMA22P
Sequence domains: Immunoglobulin C1-set domain
Structure domains: Immunoglobulins
Peptide VMAPRTVLL Chains: P, Q
Molecule details ›
Chains: P, Q
Length: 9 amino acids
Theoretical weight: 1 KDa

Ligands and Environments

1 bound ligand:

No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: ALS BEAMLINE 5.0.2
Spacegroup: P3121
Unit cell:
a: 178.7Å b: 178.7Å c: 88.2Å
α: 90° β: 90° γ: 120°
R-values:
R R work R free
0.235 0.235 0.289
Expression system: Escherichia coli