Structure of Saccharomyces cerevisiae Est3 protein

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 500 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


Structure of Est3 reveals a bimodal surface with differential roles in telomere replication.

Rao, T.Lubin, J.W.Armstrong, G.S.Tucey, T.M.Lundblad, V.Wuttke, D.S.

(2014) Proc Natl Acad Sci U S A 111: 214-218

  • DOI: https://doi.org/10.1073/pnas.1316453111
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Telomerase is essential for continuous cellular proliferation. Substantial insights have come from studies of budding yeast telomerase, which consists of a catalytic core in association with two regulatory proteins, ever shorter telomeres 1 and 3 (Est1 and Est3). We report here a high-resolution structure of the Est3 telomerase subunit determined using a recently developed strategy that combines minimal NMR experimental data with Rosetta de novo structure prediction algorithms. Est3 adopts an overall protein fold which is structurally similar to that adopted by the shelterin component TPP1. However, the characteristics of the surface of the experimentally determined Est3 structure are substantially different from those predicted by prior homology-based models of Est3. Structure-guided mutagenesis of the complete surface of the Est3 protein reveals two adjacent patches on a noncanonical face of the protein that differentially mediate telomere function. Mapping these two patches on the Est3 structure defines a set of shared features between Est3 and HsTPP1, suggesting an analogous multifunctional surface on TPP1.

  • Organizational Affiliation

    Department of Chemistry and Biochemistry, University of Colorado Boulder, Boulder, CO 80309-0596.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Telomere replication protein EST3170Saccharomyces cerevisiae S288CMutation(s): 1 
Gene Names: EST3YIL009C-A
Find proteins for Q03096 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore Q03096 
Go to UniProtKB:  Q03096
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ03096
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 500 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-12-18
    Type: Initial release
  • Version 1.1: 2014-01-15
    Changes: Database references
  • Version 1.2: 2014-01-22
    Changes: Database references
  • Version 1.3: 2023-06-14
    Changes: Data collection, Database references, Other