4cxa

X-ray diffraction
3.15Å resolution

Crystal structure of the human CDK12-cyclin K complex bound to AMPPNP

Released:

Function and Biology Details

Reactions catalysed:
ATP + a protein = ADP + a phosphoprotein
ATP + [DNA-directed RNA polymerase] = ADP + [DNA-directed RNA polymerase] phosphate
Cellular component:
  • not assigned

Structure analysis Details

Assembly composition:
hetero dimer (preferred)
Assembly name:
PDBe Complex ID:
PDB-CPX-131171 (preferred)
Entry contents:
2 distinct polypeptide molecules
Macromolecules (2 distinct):
Cyclin-dependent kinase 12 Chains: A, C
Molecule details ›
Chains: A, C
Length: 340 amino acids
Theoretical weight: 39.72 KDa
Source organism: Homo sapiens
Expression system: Spodoptera frugiperda
UniProt:
  • Canonical: Q9NYV4 (Residues: 715-1052; Coverage: 23%)
Gene names: CDK12, CRK7, CRKRS, KIAA0904
Sequence domains: Protein kinase domain
Structure domains:
Cyclin-K Chains: B, D
Molecule details ›
Chains: B, D
Length: 259 amino acids
Theoretical weight: 30.44 KDa
Source organism: Homo sapiens
Expression system: Spodoptera frugiperda
UniProt:
  • Canonical: O75909 (Residues: 11-267; Coverage: 44%)
Gene names: CCNK, CPR4
Sequence domains:
Structure domains: Cyclin-like

Ligands and Environments

1 bound ligand:
1 modified residue:

Experiments and Validation Details

Entry percentile scores
X-ray source: DIAMOND BEAMLINE I02
Spacegroup: P21
Unit cell:
a: 69.843Å b: 138.791Å c: 71.888Å
α: 90° β: 104.99° γ: 90°
R-values:
R R work R free
0.224 0.221 0.279
Expression system: Spodoptera frugiperda