3o2q

X-ray diffraction
2.4Å resolution

Crystal structure of the human symplekin-Ssu72-CTD phosphopeptide complex

Released:

Function and Biology Details

Reaction catalysed:
[a protein]-serine/threonine phosphate + H(2)O = [a protein]-serine/threonine + phosphate

Structure analysis Details

Assemblies composition:
hetero dimer
hetero trimer (preferred)
PDBe Complex ID:
PDB-CPX-163832 (preferred)
Entry contents:
3 distinct polypeptide molecules
Macromolecules (3 distinct):
Symplekin Chains: A, D
Molecule details ›
Chains: A, D
Length: 351 amino acids
Theoretical weight: 39.65 KDa
Source organism: Homo sapiens
Expression system: Escherichia coli
UniProt:
  • Canonical: Q92797 (Residues: 30-360; Coverage: 26%)
Gene names: SPK, SYMPK
Sequence domains: Symplekin/PTA1 N-terminal
Structure domains: Leucine-rich Repeat Variant
RNA polymerase II subunit A C-terminal domain phosphatase SSU72 Chains: B, E
Molecule details ›
Chains: B, E
Length: 214 amino acids
Theoretical weight: 24.76 KDa
Source organism: Homo sapiens
Expression system: Escherichia coli
UniProt:
  • Canonical: Q9NP77 (Residues: 1-194; Coverage: 100%)
Gene names: HSPC182, PNAS-120, SSU72
Sequence domains: Ssu72-like protein
Structure domains:
RNA polymerase II CTD Serine-5 phosphopeptide Chain: F
Molecule details ›
Chain: F
Length: 6 amino acids
Theoretical weight: 731 Da

Ligands and Environments

1 bound ligand:
1 modified residue:

Experiments and Validation Details

Entry percentile scores
X-ray source: NSLS BEAMLINE X29A
Spacegroup: P21
Unit cell:
a: 67.045Å b: 97.581Å c: 105.008Å
α: 90° β: 98.66° γ: 90°
R-values:
R R work R free
0.187 0.184 0.242
Expression system: Escherichia coli