PDBe 4y1a

X-ray diffraction
4Å resolution

Function and Biology Details

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 Chain: A
Molecule details ›
Chain: A
Length: 181 amino acids
Theoretical weight: 21.08 KDa
Source organism: Homo sapiens
Expression system: Homo sapiens
UniProt:
  • Canonical: P01903 (Residues: 26-206; Coverage: 79%)
Gene names: HLA-DRA, HLA-DRA1
Sequence domains:
Structure domains:
HLA class II histocompatibility antigen, DRB1-4 beta chain Chain: B
Molecule details ›
Chain: B
Length: 200 amino acids
Theoretical weight: 23.22 KDa
Source organism: Homo sapiens
Expression system: Homo sapiens
UniProt:
  • Canonical: P13760 (Residues: 30-219; Coverage: 80%)
Gene name: HLA-DRB1
Sequence domains:
Structure domains:
Insulin A chain Chain: C
Molecule details ›
Chain: C
Length: 16 amino acids
Theoretical weight: 1.66 KDa
Source organism: Homo sapiens
Expression system: Not provided
UniProt:
  • Canonical: P01308 (Residues: 75-90; Coverage: 19%)
Gene name: INS
FS17_alpha Chain: D
Molecule details ›
Chain: D
Length: 210 amino acids
Theoretical weight: 23.23 KDa
Source organism: Homo sapiens
Expression system: Escherichia coli BL21
Structure domains: Immunoglobulins
FS17_beta Chain: E
Molecule details ›
Chain: E
Length: 243 amino acids
Theoretical weight: 27.44 KDa
Source organism: Homo sapiens
Expression system: Escherichia coli BL21
Structure domains: Immunoglobulins

Ligands and Environments

1 bound ligand:

No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: AUSTRALIAN SYNCHROTRON BEAMLINE MX2
Spacegroup: I222
Unit cell:
a: 121.908Å b: 153.93Å c: 164.311Å
α: 90° β: 90° γ: 90°
R-values:
R R work R free
0.227 0.224 0.283
Expression systems:
  • Homo sapiens
  • Not provided
  • Escherichia coli BL21