4EYT

Crystal structure of the C-terminal domain of Tetrahymena telomerase protein p65


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.227 

Starting Model: experimental
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This is version 1.4 of the entry. See complete history


Literature

Structural Basis for Telomerase RNA Recognition and RNP Assembly by the Holoenzyme La Family Protein p65.

Singh, M.Wang, Z.Koo, B.K.Patel, A.Cascio, D.Collins, K.Feigon, J.

(2012) Mol Cell 47: 16-26

  • DOI: https://doi.org/10.1016/j.molcel.2012.05.018
  • Primary Citation of Related Structures:  
    2LSL, 4ERD, 4EYT

  • PubMed Abstract: 

    Telomerase is a ribonucleoprotein complex essential for maintenance of telomere DNA at linear chromosome ends. The catalytic core of Tetrahymena telomerase comprises a ternary complex of telomerase RNA (TER), telomerase reverse transcriptase (TERT), and the essential La family protein p65. NMR and crystal structures of p65 C-terminal domain and its complex with stem IV of TER reveal that RNA recognition is achieved by a combination of single- and double-stranded RNA binding, which induces a 105° bend in TER. The domain is a cryptic, atypical RNA recognition motif with a disordered C-terminal extension that forms an α helix in the complex necessary for hierarchical assembly of TERT with p65-TER. This work provides the first structural insight into biogenesis and assembly of TER with a telomerase-specific protein. Additionally, our studies define a structurally homologous domain (xRRM) in genuine La and LARP7 proteins and suggest a general mode of RNA binding for biogenesis of their diverse RNA targets.


  • Organizational Affiliation

    Department of Chemistry, and the Molecular Biology Institute, University of California, Los Angeles, Los Angeles, CA 90095-1569, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Telomerase associated protein p65
A, B, C, D, E
A, B, C, D, E, F
129Tetrahymena thermophilaMutation(s): 0 
Gene Names: TAP65
UniProt
Find proteins for W7X6T2 (Tetrahymena thermophila (strain SB210))
Explore W7X6T2 
Go to UniProtKB:  W7X6T2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupW7X6T2
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download Ideal Coordinates CCD File 
G [auth B]SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.227 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 156.19α = 90
b = 91.9β = 107.36
c = 82.83γ = 90
Software Package:
Software NamePurpose
SCALAdata scaling
PHASERphasing
PHENIXrefinement
PDB_EXTRACTdata extraction
ADSCdata collection
MOSFLMdata reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-06-20
    Type: Initial release
  • Version 1.1: 2012-07-04
    Changes: Database references
  • Version 1.2: 2012-08-01
    Changes: Database references
  • Version 1.3: 2017-07-26
    Changes: Refinement description, Source and taxonomy
  • Version 1.4: 2023-09-13
    Changes: Data collection, Database references, Derived calculations, Refinement description