5Y59

Crystal structure of Ku80 and Sir4


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.201 
  • R-Value Observed: 0.204 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural Insights into Yeast Telomerase Recruitment to Telomeres

Chen, H.Xue, J.Churikov, D.Hass, E.P.Shi, S.Lemon, L.D.Luciano, P.Bertuch, A.A.Zappulla, D.C.Geli, V.Wu, J.Lei, M.

(2018) Cell 172: 331-343.e13

  • DOI: 10.1016/j.cell.2017.12.008
  • Primary Citation of Related Structures:  
    5Y5A, 5Y59, 5Y58

  • PubMed Abstract: 
  • Telomerase maintains chromosome ends from humans to yeasts. Recruitment of yeast telomerase to telomeres occurs through its Ku and Est1 subunits via independent interactions with telomerase RNA (TLC1) and telomeric proteins Sir4 and Cdc13, respectively. However, the structures of the molecules comprising these telomerase-recruiting pathways remain unknown ...

    Telomerase maintains chromosome ends from humans to yeasts. Recruitment of yeast telomerase to telomeres occurs through its Ku and Est1 subunits via independent interactions with telomerase RNA (TLC1) and telomeric proteins Sir4 and Cdc13, respectively. However, the structures of the molecules comprising these telomerase-recruiting pathways remain unknown. Here, we report crystal structures of the Ku heterodimer and Est1 complexed with their key binding partners. Two major findings are as follows: (1) Ku specifically binds to telomerase RNA in a distinct, yet related, manner to how it binds DNA; and (2) Est1 employs two separate pockets to bind distinct motifs of Cdc13. The N-terminal Cdc13-binding site of Est1 cooperates with the TLC1-Ku-Sir4 pathway for telomerase recruitment, whereas the C-terminal interface is dispensable for binding Est1 in vitro yet is nevertheless essential for telomere maintenance in vivo. Overall, our results integrate previous models and provide fundamentally valuable structural information regarding telomere biology.


    Organizational Affiliation

    Shanghai Institute of Precision Medicine, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200125, China; Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, 200025 Shanghai, China. Electronic address: leim@shsmu.edu.cn.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ATP-dependent DNA helicase II subunit 2A [auth B]199Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: YKU80HDF2YMR106CYM9718.05C
EC: 3.6.4.12
UniProt
Find proteins for Q04437 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore Q04437 
Go to UniProtKB:  Q04437
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Sir4pB [auth C]12Saccharomyces cerevisiae VL3Mutation(s): 0 
Gene Names: VL3_0944
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.201 
  • R-Value Observed: 0.204 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 79.472α = 90
b = 79.472β = 90
c = 82.926γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-3000data scaling
PDB_EXTRACTdata extraction
HKL-3000data collection
PHENIXphasing

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-12-20
    Type: Initial release
  • Version 1.1: 2018-02-07
    Changes: Database references