X-ray diffraction
1.5Å resolution

Crystal structure of the complex of human chromobox homolog 2 (CBX2) and H3K27 peptide


Function and Biology Details

Biochemical function:
  • not assigned
Biological process:
  • not assigned
Cellular component:
  • not assigned

Structure analysis Details

Assemblies composition:
hetero tetramer
hetero dimer (preferred)
Entry contents:
2 distinct polypeptide molecules
Macromolecules (2 distinct):
Chromobox protein homolog 2 Chains: A, B
Molecule details ›
Chains: A, B
Length: 54 amino acids
Theoretical weight: 6.51 KDa
Source organism: Homo sapiens
Expression system: Escherichia coli
  • Canonical: Q14781 (Residues: 9-62; Coverage: 10%)
Gene name: CBX2
Sequence domains: Chromo (CHRromatin Organisation MOdifier) domain
Structure domains: OB fold (Dihydrolipoamide Acetyltransferase, E2P)
Histone H3 Chains: C, D
Molecule details ›
Chains: C, D
Length: 15 amino acids
Theoretical weight: 1.52 KDa
Source organism: Xenopus laevis
Expression system: Not provided
  • Canonical: Q92133 (Residues: 20-34; Coverage: 11%)
Gene names: H3l, Hist1h3f, h3, h3.2a, h3c8, h3c8.S, h3r, hist1h3g, hist1h3g.L, hist2h3, hist2h3c

Ligands and Environments

No bound ligands
1 modified residue:

Experiments and Validation Details

Entry percentile scores
X-ray source: CLSI BEAMLINE 08ID-1
Spacegroup: C2221
Unit cell:
a: 58.145Å b: 84.013Å c: 65.499Å
α: 90° β: 90° γ: 90°
R R work R free
0.21 0.209 0.223
Expression systems:
  • Escherichia coli
  • Not provided