PDBe 4x3k

X-ray diffraction
1.45Å resolution

Crystal structure of chromobox homolog 7 (CBX7) chromodomain with H3K27me3 peptide

Released:

Function and Biology Details

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

Structure analysis Details

Assembly composition:
hetero tetramer (preferred)
Entry contents:
2 distinct polypeptide molecules
Macromolecules (2 distinct):
Chromobox protein homolog 7 Chains: A, B
Molecule details ›
Chains: A, B
Length: 64 amino acids
Theoretical weight: 7.73 KDa
Source organism: Mus musculus
Expression system: Escherichia coli
UniProt:
  • Canonical: Q8VDS3 (Residues: 7-66; Coverage: 38%)
Gene names: Cbx7, D15Ertd417e
Sequence domains: Chromo (CHRromatin Organisation MOdifier) domain
Structure domains: OB fold (Dihydrolipoamide Acetyltransferase, E2P)
Histone H3.1 Chains: C, D
Molecule details ›
Chains: C, D
Length: 7 amino acids
Theoretical weight: 776 Da
Source organism: Homo sapiens
Expression system: Not provided
UniProt:
  • Canonical: P68431 (Residues: 24-30; Coverage: 5%)
Gene names: H3FA, H3FB, H3FC, H3FD, H3FF, H3FH, H3FI, H3FJ, H3FK, H3FL, HIST1H3A, HIST1H3B, HIST1H3C, HIST1H3D, HIST1H3E, HIST1H3F, HIST1H3G, HIST1H3H, HIST1H3I, HIST1H3J

Ligands and Environments

2 bound ligands:

1 modified residue:

Experiments and Validation Details

Entry percentile scores
X-ray source: NSLS BEAMLINE X6A
Spacegroup: P21
Unit cell:
a: 45.46Å b: 33.23Å c: 46.16Å
α: 90° β: 95.8° γ: 90°
R-values:
R R work R free
0.191 0.189 0.232
Expression systems:
  • Escherichia coli
  • Not provided