Biological Assembly 1  

 3D View: Structure

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 19.30 kDa 
• Atom Count: 1356 
• Modelled Residue Count: 170 
• Deposited Residue Count: 170 
• Unique protein chains: 1

2M9V

Structure of Saccharomyces cerevisiae Est3 protein

• DOI: 10.2210/pdb2M9V/pdb
• BMRB: 19311

• Classification: PROTEIN BINDING
• Organism(s): Saccharomyces cerevisiae S288C
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 2013-06-21 Released: 2013-12-18 
• Deposition Author(s): Rao, T., Armstrong, G.S., Wuttke, D.S.

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Experimental Data Snapshot

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

Literature

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

• PubMed: 24344315 
• DOI: 10.1073/pnas.1316453111
• Primary Citation of Related Structures:  
  2M9V


• 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.

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Telomere replication protein EST3	A	170	Saccharomyces cerevisiae S288C	Mutation(s): 1  Gene Names: EST3, YIL009C-A
UniProt
Find proteins for Q03096 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c)) Explore Q03096  Go to UniProtKB:  Q03096

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 500 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 2M9V Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2013-06-21 
• Released Date: 2013-12-18 
Deposition Author(s): Rao, T., Armstrong, G.S., Wuttke, D.S.

Revision History  

• 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