5DOF image
Deposition Date 2015-09-11
Release Date 2015-11-25
Last Version Date 2024-10-09
Entry Detail
PDB ID:
5DOF
Keywords:
DNA BINDING PROTEIN
Title:
Crystal structure of Tetrahymena p19
Biological Source:
Source Organism:
Tetrahymena thermophila (Taxon ID: 5911)
Host Organism:
Escherichia coli BL21(DE3)
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
1.70 Å
R-Value Free:
0.22
R-Value Work:
0.17
R-Value Observed:
0.17
Space Group:
P 1 21 1
5DOF validation report
Macromolecular Entities
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Telomerase-associated protein 19
Gene (Uniprot):TAP19
Chain IDs:A, B, C, D
Chain Length:163
Number of Molecules:4
Biological Source:Tetrahymena thermophila
UniProt ID:D2CVN7
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
MSE A MET modified residue
Primary Citation
The Tetrahymena telomerase p75-p45-p19 subcomplex is a unique CST complex.
Nat.Struct.Mol.Biol. 22 1023 1026 (2015)
PMID: 26551074 DOI: 10.1038/nsmb.3126

Abstact

Tetrahymena telomerase holoenzyme subunits p75, p45 and p19 form a subcomplex (7-4-1) peripheral to the catalytic core. We report structures of p45 and p19 and reveal them as the Stn1 and Ten1 subunits of the CST complex, which stimulates telomerase complementary-strand synthesis. 7-4-1 binds telomeric single-stranded DNA, and mutant p19 overexpression causes telomere 3'-overhang elongation. We propose that telomerase-tethered Tetrahymena CST coordinates telomere G-strand and C-strand synthesis.

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Primary Citation of related structures
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