5Y58

Crystal structure of Ku70/80 and TLC1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.217 

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

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ATP-dependent DNA helicase II subunit 1A, D [auth C], G [auth E]575Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: YKU70HDF1NES24YMR284WYM8021.10
EC: 3.6.4.12
UniProt
Find proteins for P32807 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P32807 
Go to UniProtKB:  P32807
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
ATP-dependent DNA helicase II subunit 2B, E [auth D], H [auth F]628Saccharomyces 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
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Entity ID: 3
MoleculeChainsLengthOrganismImage
TLC1C [auth X], F [auth Y], I [auth Z]30Saccharomyces cerevisiae
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.217 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 116.296α = 77.43
b = 115.159β = 78.48
c = 115.847γ = 63.73
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-3000data scaling
PDB_EXTRACTdata extraction
XDSphasing

Structure Validation

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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