2MS6

Human Telomeric G-quadruplex DNA sequence (TTAGGGT)4 complexed with Flavonoid Quercetin


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural Insight into the interaction of Flavonoids with Human Telomeric Sequence

Tawani, A.Kumar, A.

(2015) Sci Rep 5: 17574-17574

  • DOI: 10.1038/srep17574
  • Primary Citation of Related Structures:  
    2MS6

  • PubMed Abstract: 
  • Flavonoids are a group of naturally available compounds that are an attractive source for drug discovery. Their potential to act as anti-tumourigenic and anti-proliferative agents has been reported previously but is not yet fully understood. Targetin ...

    Flavonoids are a group of naturally available compounds that are an attractive source for drug discovery. Their potential to act as anti-tumourigenic and anti-proliferative agents has been reported previously but is not yet fully understood. Targeting human telomeric G-quadruplex DNA could be one of the mechanisms by which these flavonoids exert anticancer activity. We have performed detailed biophysical studies for the interaction of four representative flavonoids, Luteolin, Quercetin, Rutin and Genistein, with the human telomeric G-quadruplex sequence tetramolecular d-(T2AG3T) (Tel7). In addition, we used NMR spectroscopy to derive the first model for the complex formed between Quercetin and G-quadruplex sequence. The model showed that Quercetin stabilises the G-quadruplex structure and does not open the G-tetrad. It interacts with the telomeric sequence through π-stacking at two sites: between T1pT2 and between G6pT7. Based on our findings, we suggest that Quercetin could be a potent candidate for targeting the telomere and thus, act as a potent anti-cancer agent.


    Organizational Affiliation

    Centre for Biosciences and Biomedical Engineering, Indian Institute of Technology Indore, Indore, Madhya Pradesh, India.



Macromolecules
  • Find similar nucleic acids by:  Sequence   |   Structure
  • Entity ID: 1
    MoleculeChainsLengthOrganismImage
    DNA_(5'-D(*TP*TP*AP*GP*GP*GP*T)-3')A, B, C, D7synthetic construct
    Small Molecules
    Ligands 1 Unique
    IDChainsName / Formula / InChI Key2D Diagram3D Interactions
    QUE
    Query on QUE

    Download CCD File 
    C, D
    3,5,7,3',4'-PENTAHYDROXYFLAVONE
    C15 H10 O7
    REFJWTPEDVJJIY-UHFFFAOYSA-N
     Ligand Interaction
    Experimental Data & Validation

    Experimental Data

    • Method: SOLUTION NMR
    • Conformers Calculated: 100 
    • Conformers Submitted: 
    • Selection Criteria: structures with the lowest energy 
    • OLDERADO: 2MS6 Olderado

    Structure Validation

    View Full Validation Report



    Entry History 

    Deposition Data

    • Deposited Date: 2014-07-24 
    • Released Date: 2015-01-28 
    • Deposition Author(s): Kumar, A., Tawani, A.

    Revision History 

    • Version 1.0: 2015-01-28
      Type: Initial release
    • Version 1.1: 2015-12-16
      Changes: Database references