5C9H

Structural Basis of Template Boundary Definition in Tetrahymena Telomerase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.290 
  • R-Value Work: 0.239 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural basis of template-boundary definition in Tetrahymena telomerase.

Jansson, L.I.Akiyama, B.M.Ooms, A.Lu, C.Rubin, S.M.Stone, M.D.

(2015) Nat.Struct.Mol.Biol. 22: 883-888

  • DOI: 10.1038/nsmb.3101

  • PubMed Abstract: 
  • Telomerase is required to maintain repetitive G-rich telomeric DNA sequences at chromosome ends. To do so, the telomerase reverse transcriptase (TERT) subunit reiteratively uses a small region of the integral telomerase RNA (TER) as a template. An es ...

    Telomerase is required to maintain repetitive G-rich telomeric DNA sequences at chromosome ends. To do so, the telomerase reverse transcriptase (TERT) subunit reiteratively uses a small region of the integral telomerase RNA (TER) as a template. An essential feature of telomerase catalysis is the strict definition of the template boundary to determine the precise TER nucleotides to be reverse transcribed by TERT. We report the 3-Å crystal structure of the Tetrahymena TERT RNA-binding domain (tTRBD) bound to the template boundary element (TBE) of TER. tTRBD is wedged into the base of the TBE RNA stem-loop, and each of the flanking RNA strands wraps around opposite sides of the protein domain. The structure illustrates how the tTRBD establishes the template boundary by positioning the TBE at the correct distance from the TERT active site to prohibit copying of nontemplate nucleotides.


    Organizational Affiliation

    Department of Chemistry and Biochemistry, University of California Santa Cruz, Santa Cruz, California, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Telomerase reverse transcriptase
A, B
303Tetrahymena thermophilaMutation(s): 0 
Gene Names: TERT
EC: 2.7.7.49
Find proteins for O77448 (Tetrahymena thermophila)
Go to Gene View: TERT
Go to UniProtKB:  O77448
Entity ID: 2
MoleculeChainsLengthOrganism
RNA (5'-R(P*AP*GP*AP*AP*CP*UP*GP*UP*CP*A)-3')D,E13Tetrahymena thermophila
Entity ID: 3
MoleculeChainsLengthOrganism
RNA (5'-R(P*UP*CP*AP*UP*UP*CP*AP*GP*UP*UP*CP*U)-3')C,G13Tetrahymena thermophila
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MG
Query on MG

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.290 
  • R-Value Work: 0.239 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 58.530α = 90.00
b = 117.770β = 90.00
c = 131.180γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
SCALAdata scaling
MOSFLMdata reduction
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical SciencesUnited StatesR01 GM095850
National Institutes of Health/National Institute of General Medical SciencesUnited StatesT32GM008646-16

Revision History 

  • Version 1.0: 2015-10-14
    Type: Initial release
  • Version 1.1: 2015-12-02
    Type: Database references
  • Version 1.2: 2017-09-20
    Type: Author supporting evidence, Derived calculations