2B2A

Crystal Structure of the TEN domain of the Telomerase Reverse Transcriptase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.22 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.238 
  • R-Value Observed: 0.238 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Crystal structure of the essential N-terminal domain of telomerase reverse transcriptase.

Jacobs, S.A.Podell, E.R.Cech, T.R.

(2006) Nat Struct Mol Biol 13: 218-225

  • DOI: 10.1038/nsmb1054
  • Primary Citation of Related Structures:  
    2B2A

  • PubMed Abstract: 
  • Telomerase, a ribonucleoprotein enzyme, adds telomeric DNA repeats to the ends of linear chromosomes. Here we report the first high-resolution structure of any portion of the telomerase reverse transcriptase, the telomerase essential N-terminal (TEN) domain from Tetrahymena thermophila ...

    Telomerase, a ribonucleoprotein enzyme, adds telomeric DNA repeats to the ends of linear chromosomes. Here we report the first high-resolution structure of any portion of the telomerase reverse transcriptase, the telomerase essential N-terminal (TEN) domain from Tetrahymena thermophila. The structure, which seems to represent a novel protein fold, shows phylogenetically conserved amino acid residues in a groove on its surface. These residues are crucial for telomerase catalytic activity, and several of them are required for sequence-specific binding of a single-stranded telomeric DNA primer. The positively charged C terminus, which becomes ordered upon interaction with other macromolecules, is involved in binding RNA in a non-sequence-specific manner. The TEN domain's ability to bind both RNA and telomeric DNA, coupled with the notably strong effects on activity upon mutagenesis of single surface residues, suggest how this domain contributes to telomerase catalysis.


    Organizational Affiliation

    Howard Hughes Medical Institute, Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0215, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Telomerase reverse transcriptase ABC199Tetrahymena thermophilaMutation(s): 1 
Gene Names: TERT
EC: 2.7.7.49
Find proteins for O77448 (Tetrahymena thermophila (strain SB210))
Explore O77448 
Go to UniProtKB:  O77448
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.22 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.238 
  • R-Value Observed: 0.238 
  • Space Group: P 31
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 111.1α = 90
b = 111.1β = 90
c = 42.16γ = 120
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data reduction
SCALEPACKdata scaling
SOLVEphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-02-07
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance