4XHW

Crystal structure of Timeless_PAB domain in SeMet-labelled form


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.193 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Timeless Interacts with PARP-1 to Promote Homologous Recombination Repair.

Xie, S.Mortusewicz, O.Ma, H.T.Herr, P.Poon, R.R.Helleday, T.Qian, C.

(2015) Mol.Cell 60: 163-176

  • DOI: 10.1016/j.molcel.2015.07.031
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Human Timeless helps stabilize replication forks during normal DNA replication and plays a critical role in activation of the S phase checkpoint and proper establishment of sister chromatid cohesion. However, it remains elusive whether Timeless is in ...

    Human Timeless helps stabilize replication forks during normal DNA replication and plays a critical role in activation of the S phase checkpoint and proper establishment of sister chromatid cohesion. However, it remains elusive whether Timeless is involved in the repair of damaged DNA. Here, we identify that Timeless physically interacts with PARP-1 independent of poly(ADP-ribosyl)ation. We present high-resolution crystal structures of Timeless PAB (PARP-1-binding domain) in free form and in complex with PARP-1 catalytic domain. Interestingly, Timeless PAB domain specifically recognizes PARP-1, but not PARP-2 or PARP-3. Timeless-PARP-1 interaction does not interfere with PARP-1 enzymatic activity. We demonstrate that rapid and transient accumulation of Timeless at laser-induced DNA damage sites requires PARP-1, but not poly(ADP-ribosyl)ation and that Timeless is co-trapped with PARP-1 at DNA lesions upon PARP inhibition. Furthermore, we show that Timeless and PARP-1 interaction is required for efficient homologous recombination repair.


    Organizational Affiliation

    School of Biomedical Sciences, The University of Hong Kong, Hong Kong.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein timeless homolog
A, B, C, D
103Homo sapiensMutation(s): 0 
Gene Names: TIMELESS (TIM, TIM1, TIMELESS1)
Find proteins for Q9UNS1 (Homo sapiens)
Go to Gene View: TIMELESS
Go to UniProtKB:  Q9UNS1
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B, C, D
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.193 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 66.597α = 90.00
b = 100.083β = 90.00
c = 149.581γ = 90.00
Software Package:
Software NamePurpose
PHENIXphasing
HKL-2000data reduction
HKL-2000data scaling
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2015-01-06 
  • Released Date: 2015-09-30 
  • Deposition Author(s): Xie, S., Qian, C.

Funding OrganizationLocationGrant Number
General Research CouncilHong Kong776313
General Research CouncilHong Kong775712

Revision History 

  • Version 1.0: 2015-09-30
    Type: Initial release
  • Version 1.1: 2015-10-14
    Type: Database references