6TAZ

Timeless couples G quadruplex detection with processing by DDX11 during DNA replication


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Timeless couples G-quadruplex detection with processing by DDX11 helicase during DNA replication.

Lerner, L.K.Holzer, S.Kilkenny, M.L.Svikovic, S.Murat, P.Schiavone, D.Eldridge, C.B.Bittleston, A.Maman, J.D.Branzei, D.Stott, K.Pellegrini, L.Sale, J.E.

(2020) EMBO J 39: e104185-e104185

  • DOI: https://doi.org/10.15252/embj.2019104185
  • Primary Citation of Related Structures:  
    6T9Q, 6TAZ

  • PubMed Abstract: 

    Regions of the genome with the potential to form secondary DNA structures pose a frequent and significant impediment to DNA replication and must be actively managed in order to preserve genetic and epigenetic integrity. How the replisome detects and responds to secondary structures is poorly understood. Here, we show that a core component of the fork protection complex in the eukaryotic replisome, Timeless, harbours in its C-terminal region a previously unappreciated DNA-binding domain that exhibits specific binding to G-quadruplex (G4) DNA structures. We show that this domain contributes to maintaining processive replication through G4-forming sequences, and exhibits partial redundancy with an adjacent PARP-binding domain. Further, this function of Timeless requires interaction with and activity of the helicase DDX11. Loss of both Timeless and DDX11 causes epigenetic instability at G4-forming sequences and DNA damage. Our findings indicate that Timeless contributes to the ability of the replisome to sense replication-hindering G4 formation and ensures the prompt resolution of these structures by DDX11 to maintain processive DNA synthesis.


  • Organizational Affiliation

    MRC Laboratory of Molecular Biology, Cambridge, UK.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Protein timeless homologA [auth B]141Homo sapiensMutation(s): 0 
Gene Names: TIMELESSTIMTIM1TIMELESS1
UniProt & NIH Common Fund Data Resources
Find proteins for Q9UNS1 (Homo sapiens)
Explore Q9UNS1 
Go to UniProtKB:  Q9UNS1
PHAROS:  Q9UNS1
GTEx:  ENSG00000111602 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9UNS1
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Wellcome TrustUnited Kingdom104641/Z/14/Z

Revision History  (Full details and data files)

  • Version 1.0: 2020-07-01
    Type: Initial release
  • Version 1.1: 2020-08-12
    Changes: Database references
  • Version 1.2: 2020-12-16
    Changes: Database references
  • Version 1.3: 2023-06-14
    Changes: Database references, Other
  • Version 1.4: 2024-06-19
    Changes: Data collection, Database references