6ZDQ

Structure of telomerase from Candida albicans in complexe with TWJ fragment of telomeric RNA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.98 Å
  • R-Value Free: 0.292 
  • R-Value Work: 0.238 
  • R-Value Observed: 0.241 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Crystal structures of N-terminally truncated telomerase reverse transcriptase from fungi‡.

Zhai, L.T.Rety, S.Chen, W.F.Song, Z.Y.Auguin, D.Sun, B.Dou, S.X.Xi, X.G.

(2021) Nucleic Acids Res 49: 4768-4781

  • DOI: https://doi.org/10.1093/nar/gkab261
  • Primary Citation of Related Structures:  
    6ZD1, 6ZD2, 6ZD6, 6ZDP, 6ZDQ, 6ZDU

  • PubMed Abstract: 

    Telomerase plays critical roles in cellular aging, in the emergence and/or development of cancer, and in the capacity for stem-cell renewal, consists of a catalytic telomerase reverse transcriptase (TERT) and a template-encoding RNA (TER). TERs from diverse organisms contain two conserved structural elements: the template-pseudoknot (T-PK) and a helical three-way junction (TWJ). Species-specific features of the structure and function of telomerase make obtaining a more in-depth understanding of the molecular mechanism of telomerase particularly important. Here, we report the first structural studies of N-terminally truncated TERTs from Candida albicans and Candida tropicalis in apo form and complexed with their respective TWJs in several conformations. We found that Candida TERT proteins perform only one round of telomere addition in the presence or absence of PK/TWJ and display standard reverse transcriptase activity. The C-terminal domain adopts at least two extreme conformations and undergoes conformational interconversion, which regulates the catalytic activity. Most importantly, we identified a conserved tertiary structural motif, called the U-motif, which interacts with the reverse transcriptase domain and is crucial for catalytic activity. Together these results shed new light on the structure and mechanics of fungal TERTs, which show common TERT characteristics, but also display species-specific features.


  • Organizational Affiliation

    State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi 712100, China.


Macromolecules

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Telomerase reverse transcriptase697Candida albicans SC5314Mutation(s): 0 
Gene Names: TERTorf19.5089CAALFM_C108130CA
EC: 2.7.7.49
UniProt
Find proteins for A0A1D8PEA0 (Candida albicans (strain SC5314 / ATCC MYA-2876))
Explore A0A1D8PEA0 
Go to UniProtKB:  A0A1D8PEA0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A1D8PEA0
Sequence Annotations
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  • Reference Sequence
Find similar nucleic acids by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains LengthOrganismImage
RNAB [auth C]65Candida albicans SC5314
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.98 Å
  • R-Value Free: 0.292 
  • R-Value Work: 0.238 
  • R-Value Observed: 0.241 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 74.156α = 90
b = 74.156β = 90
c = 451.418γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
PHENIXrefinement
XDSdata reduction
autoPROCdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2021-04-28
    Type: Initial release
  • Version 1.1: 2021-05-05
    Changes: Database references
  • Version 1.2: 2021-05-12
    Changes: Database references