3KYL

Structure of the catalytic subunit of telomerase bound to its RNA template and telomeric DNA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.242 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structural basis for telomerase catalytic subunit TERT binding to RNA template and telomeric DNA.

Mitchell, M.Gillis, A.Futahashi, M.Fujiwara, H.Skordalakes, E.

(2010) Nat.Struct.Mol.Biol. 17: 513-518

  • DOI: 10.1038/nsmb.1777

  • PubMed Abstract: 
  • Telomerase is a specialized DNA polymerase that extends the 3' ends of eukaryotic linear chromosomes, a process required for genomic stability and cell viability. Here we present the crystal structure of the active Tribolium castaneum telomerase cata ...

    Telomerase is a specialized DNA polymerase that extends the 3' ends of eukaryotic linear chromosomes, a process required for genomic stability and cell viability. Here we present the crystal structure of the active Tribolium castaneum telomerase catalytic subunit, TERT, bound to an RNA-DNA hairpin designed to resemble the putative RNA-templating region and telomeric DNA. The RNA-DNA hybrid adopts a helical structure, docked in the interior cavity of the TERT ring. Contacts between the RNA template and motifs 2 and B' position the solvent-accessible RNA bases close to the enzyme active site for nucleotide binding and selectivity. Nucleic acid binding induces rigid TERT conformational changes to form a tight catalytic complex. Overall, TERT-RNA template and TERT-telomeric DNA associations are remarkably similar to those observed for retroviral reverse transcriptases, suggesting common mechanistic aspects of DNA replication between the two families of enzymes.


    Organizational Affiliation

    Gene Expression and Regulation Program, The Wistar Institute, Philadelphia, Pennsylvania, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Telomerase reverse transcriptase
A
596Tribolium castaneumGene Names: TERT
Find proteins for Q0QHL8 (Tribolium castaneum)
Go to Gene View: TERT
Go to UniProtKB:  Q0QHL8
Entity ID: 2
MoleculeChainsLengthOrganism
DNA/RNA (5'-R(*CP*UP*GP*AP*CP*CP*UP*GP*AP*C)-D(P*TP*TP*CP*GP*GP*TP*CP*AP*GP*GP*TP*CP*AP*G)-3')E24N/A
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MG
Query on MG

Download SDF File 
Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.242 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 77.231α = 90.00
b = 52.782β = 101.90
c = 101.609γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
REFMACrefinement
PHASERphasing
SCALAdata scaling
ELVESrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2009-12-06 
  • Released Date: 2010-03-31 
  • Deposition Author(s): Skordalakes, E.

Revision History 

  • Version 1.0: 2010-03-31
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance
  • Version 1.2: 2012-02-22
    Type: Database references
  • Version 1.3: 2017-11-01
    Type: Refinement description