5DOK

Crystal structure of Tetrahymena p45C

PDB DOI: https://doi.org/10.2210/pdb5DOK/pdb

Classification: DNA BINDING PROTEIN
Organism(s): Tetrahymena thermophila
Expression System: Escherichia coli BL21(DE3)
Mutation(s): No

Deposited: 2015-09-11 Released: 2015-11-25
Deposition Author(s): Wan, B., Tang, T., Wu, J., Lei, M.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.30 Å
R-Value Free: 0.276
R-Value Work: 0.223
R-Value Observed: 0.226

wwPDB Validation 3D Report Full Report

This is version 1.2 of the entry. See complete history.

Literature

The Tetrahymena telomerase p75-p45-p19 subcomplex is a unique CST complex

Wan, B., Tang, T., Upton, H., Shuai, J., Zhou, Y., Li, S., Chen, J., Brunzelle, J.S., Zeng, Z., Collins, K., Wu, J., Lei, M.

(2015) Nat Struct Mol Biol 22: 1023-1026

PubMed: 26551074 Search on PubMedSearch on PubMed Central
DOI: https://doi.org/10.1038/nsmb.3126
Primary Citation of Related Structures:
5DOF, 5DOI, 5DOK

PubMed Abstract:
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.

Organizational Affiliation

National Center for Protein Science Shanghai, State Key Laboratory of Molecular Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China.

Macromolecule Content

Total Structure Weight: 48.03 kDa
Atom Count: 2,884
Modelled Residue Count: 339
Deposited Residue Count: 408
Unique protein chains: 1

Macromolecules

Find similar proteins by:

(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Telomerase associated protein p45	A, B	204	Tetrahymena thermophila	Mutation(s): 0 Gene Names: TAP45
UniProt
Find proteins for Q6JXI5 (Tetrahymena thermophila (strain SB210)) Explore Q6JXI5 Go to UniProtKB: Q6JXI5
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	Q6JXI5
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
MG Query on MG Download Ideal Coordinates CCD File SDF format, chain C [auth A] SDF format, chain D [auth B] MOL2 format, chain C [auth A] MOL2 format, chain D [auth B]	C [auth A], D [auth B]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N		Interactions Focus chain C [auth A] Focus chain D [auth B] Interactions & Density Focus chain C [auth A] Focus chain D [auth B]

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 2.30 Å
R-Value Free: 0.276
R-Value Work: 0.223
R-Value Observed: 0.226
Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 75.999	α = 90
b = 89.051	β = 108.64
c = 75.888	γ = 90

Software Package:

Software Name	Purpose
SCALEPACK	data scaling
PHENIX	refinement
PDB_EXTRACT	data extraction
Coot	model building
PHENIX	phasing

Structure Validation

View Full Validation Report

Entry History

Deposition Data

Released Date: 2015-11-25

Deposition Author(s):

Revision History (Full details and data files)

Version 1.0: 2015-11-25
Type: Initial release
Version 1.1: 2015-12-23
Changes: Database references
Version 1.2: 2024-03-20
Changes: Data collection, Database references, Derived calculations