› 4h3k

X-ray diffraction
2Å resolution

Crystal structure of a ternary complex of human symplekin NTD, human Ssu72 and a RNA polymerase II CTD peptide phosphorylated at Ser-2, Ser-5 and Ser-7

Released:
DOI: 10.2210/pdb4h3k/pdb
PDB entry 4h3k coloured by chain, front view.
PDB entry 4h3k coloured by chain, side view.
PDB entry 4h3k coloured by chain, top view.
Source organism: Homo sapiens
Primary publication:
An unexpected binding mode for a Pol II CTD peptide phosphorylated at Ser7 in the active site of the CTD phosphatase Ssu72.
Xiang K, Manley JL, Tong L
Genes Dev 26 2265-70 (2012)
PMID: 23070812

Function and Biology Details

Reaction catalysed: 
[a protein]-serine/threonine phosphate + H(2)O = [a protein]-serine/threonine + phosphate
Biochemical function:
Biological process:
Cellular component:
Sequence domains:

Structure analysis Details

Assemblies composition:
hetero dimer
hetero trimer (preferred)
PDBe Complex ID:
PDB-CPX-164524 (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:
Hexapeptide Chain: F
Molecule details ›
Chain: F
Length: 10 amino acids
Theoretical weight: 1.32 KDa

Ligands and Environments

1 bound ligand:
Ligand PO4 1 x PO4
1 modified residue:
Ligand SEP 3 x SEP

Experiments and Validation Details

Entry percentile scores
X-ray source: NSLS BEAMLINE X29A
Spacegroup: P21
Unit cell:
a: 67.583Å b: 97.364Å c: 105.278Å
α: 90° β: 97.86° γ: 90°
R-values:
R R work R free
0.199 0.197 0.233
Expression system: Escherichia coli

Quick links

Citations

12 review citations

RNA polymerase II transcription elongation control.
Guo et al. (2013)
11 more

3 mentions without citation

Delineating the structural blueprint of the pre-mRNA 3'-end processing machinery.
Xiang et al. (2014)
2 more