5WQD

Crystal structure of TRF2 TRFH in complex with an NBS1 peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.233 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

NBS1 Phosphorylation Status Dictates Repair Choice of Dysfunctional Telomeres

Rai, R.Hu, C.Broton, C.Chen, Y.Lei, M.Chang, S.

(2017) Mol. Cell 65: 801-817.e4

  • DOI: 10.1016/j.molcel.2017.01.016

  • PubMed Abstract: 
  • Telomeres employ TRF2 to protect chromosome ends from activating the DNA damage sensor MRE11-RAD50-NBS1 (MRN), thereby repressing ATM-dependent DNA damage checkpoint responses. How TRF2 prevents MRN activation at dysfunctional telomeres is unclear. H ...

    Telomeres employ TRF2 to protect chromosome ends from activating the DNA damage sensor MRE11-RAD50-NBS1 (MRN), thereby repressing ATM-dependent DNA damage checkpoint responses. How TRF2 prevents MRN activation at dysfunctional telomeres is unclear. Here, we show that the phosphorylation status of NBS1 determines the repair pathway choice of dysfunctional telomeres. The crystal structure of the TRF2-NBS1 complex at 3.0 Å resolution shows that the NBS1 429YQLSP433 motif interacts specifically with the TRF2TRFH domain. Phosphorylation of NBS1 serine 432 by CDK2 in S/G2 dissociates NBS1 from TRF2, promoting TRF2-Apollo/SNM1B complex formation and the protection of leading-strand telomeres. Classical-NHEJ-mediated repair of telomeres lacking TRF2 requires phosphorylated NBS1S432 to activate ATM, while interaction of de-phosphorylated NBS1S432 with TRF2 promotes alternative-NHEJ repair of telomeres lacking POT1-TPP1. Our work advances understanding of how the TRF2TRFH domain orchestrates telomere end protection and reveals how the phosphorylation status of the NBS1S432 dictates repair pathway choice of dysfunctional telomeres.


    Organizational Affiliation

    Department of Laboratory Medicine, Yale University School of Medicine, 330 Cedar Street, New Haven, CT 06520, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Telomeric repeat-binding factor 2
A, B, C, D, E, F, G
204Homo sapiensMutation(s): 0 
Gene Names: TERF2 (TRBF2, TRF2)
Find proteins for Q15554 (Homo sapiens)
Go to Gene View: TERF2
Go to UniProtKB:  Q15554
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Nibrin
H, I, J, K, L, M, N
16Homo sapiensMutation(s): 0 
Gene Names: NBN (NBS, NBS1, P95)
Find proteins for O60934 (Homo sapiens)
Go to Gene View: NBN
Go to UniProtKB:  O60934
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.233 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 144.616α = 90.00
b = 153.267β = 90.00
c = 108.029γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data collection
HKLdata reduction
PHENIXrefinement
HKL-2000data processing
HKLdata scaling
HKL-2000data reduction
PHASERphasing
PDB_EXTRACTdata extraction
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2016-11-26 
  • Released Date: 2017-03-08 
  • Deposition Author(s): Hu, C., Chen, Y., Lei, M.

Revision History 

  • Version 1.0: 2017-03-08
    Type: Initial release
  • Version 1.1: 2017-03-15
    Type: Database references