4XHU

The complex structure of Timeless_PAB and PARP-1_catalytic domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.09 Å
  • R-Value Free: 0.210 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.183 

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:  
    4XHT, 4XHU, 4XHW

  • 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. Electronic address: cmqian@hku.hk.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Poly [ADP-ribose] polymerase 1AC359Homo sapiensMutation(s): 0 
Gene Names: PARP1ADPRTPPOL
EC: 2.4.2.30 (PDB Primary Data), 2.4.2 (UniProt)
Find proteins for P09874 (Homo sapiens)
Explore P09874 
Go to UniProtKB:  P09874
NIH Common Fund Data Resources
PHAROS  P09874
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Protein timeless homologBD103Homo sapiensMutation(s): 0 
Gene Names: TIMELESSTIMTIM1TIMELESS1
Find proteins for Q9UNS1 (Homo sapiens)
Explore Q9UNS1 
Go to UniProtKB:  Q9UNS1
NIH Common Fund Data Resources
PHAROS  Q9UNS1
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download CCD File 
A, C, D
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
ACT
Query on ACT

Download CCD File 
A, C
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
CA
Query on CA

Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.09 Å
  • R-Value Free: 0.210 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.183 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 99.364α = 90
b = 98.416β = 113.19
c = 116.9γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHENIXphasing

Structure Validation

View Full Validation Report



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
    Changes: Database references