3DU6

Structure of the catalytic subunit of telomerase, TERT


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.71 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.238 
  • R-Value Observed: 0.240 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structure of the Tribolium castaneum telomerase catalytic subunit TERT.

Gillis, A.J.Schuller, A.P.Skordalakes, E.

(2008) Nature 455: 633-637

  • DOI: 10.1038/nature07283
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • A common hallmark of human cancers is the overexpression of telomerase, a ribonucleoprotein complex that is responsible for maintaining the length and integrity of chromosome ends. Telomere length deregulation and telomerase activation is an early, a ...

    A common hallmark of human cancers is the overexpression of telomerase, a ribonucleoprotein complex that is responsible for maintaining the length and integrity of chromosome ends. Telomere length deregulation and telomerase activation is an early, and perhaps necessary, step in cancer cell evolution. Here we present the high-resolution structure of the Tribolium castaneum catalytic subunit of telomerase, TERT. The protein consists of three highly conserved domains, organized into a ring-like structure that shares common features with retroviral reverse transcriptases, viral RNA polymerases and B-family DNA polymerases. Domain organization places motifs implicated in substrate binding and catalysis in the interior of the ring, which can accommodate seven to eight bases of double-stranded nucleic acid. Modelling of an RNA-DNA heteroduplex in the interior of this ring demonstrates a perfect fit between the protein and the nucleic acid substrate, and positions the 3'-end of the DNA primer at the active site of the enzyme, providing evidence for the formation of an active telomerase elongation complex.


    Organizational Affiliation

    Gene Expression and Regulation Program, The Wistar Institute, 3601 Spruce Street, Philadelphia, Pennsylvania 19104, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Telomerase reverse transcriptaseA, B596Tribolium castaneumMutation(s): 0 
Gene Names: TERTTcasGA2_TC010963
EC: 2.7.7.49
Find proteins for Q0QHL8 (Tribolium castaneum)
Explore Q0QHL8 
Go to UniProtKB:  Q0QHL8
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.71 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.238 
  • R-Value Observed: 0.240 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 85.042α = 90
b = 122.657β = 90
c = 212.406γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
ADSCdata collection
MOSFLMdata reduction
SCALAdata scaling
SOLVEphasing

Structure Validation

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Entry History 

Deposition Data

  • Deposited Date: 2008-07-16 
  • Released Date: 2008-08-26 
  • Deposition Author(s): Skordalakes, E.

Revision History 

  • Version 1.0: 2008-08-26
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Refinement description, Version format compliance