6K3X

G-quadruplex complex with linear dinucleotide d(AG)


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report



Literature

Solution Structures of a G-Quadruplex Bound to Linear- and Cyclic-Dinucleotides.

Winnerdy, F.R.Das, P.Heddi, B.Phan, A.T.

(2019) J Am Chem Soc 141: 18038-18047

  • DOI: 10.1021/jacs.9b05642
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Cyclic dinucleotides have emerged as important secondary messengers and cell signaling molecules that regulate several cell responses. A guanine-deficit G-quadruplex structure formation by a sequence containing (4 n - 1) guanines, n ...

    Cyclic dinucleotides have emerged as important secondary messengers and cell signaling molecules that regulate several cell responses. A guanine-deficit G-quadruplex structure formation by a sequence containing (4 n - 1) guanines, n denoting the number of G-tetrad layers, was previously reported. Here, a (4 n - 1) G-quadruplex structure is shown to be capable of binding guanine-containing dinucleotides in micromolar affinity. The guanine base of the dinucleotides interacts with a vacant G-triad, forming four additional Hoogsteen hydrogen bonds to complete a G-tetrad. Solution structures of two complexes, both comprised of a (4 n - 1) G-quadruplex structure, one bound to a linear dinucleotide (d(AG)) and the other to a cyclic dinucleotide (cGAMP), are solved using NMR spectroscopy. The latter suggests sufficiently strong interaction between the guanine base of the dinucleotide and the vacant G-triad, which acts as an anchor point of binding. The binding interfaces from the two solution structures provide useful information for specific ligand design. The results also infer that other guanine-containing metabolites of a similar size have the capability of binding G-quadruplexes, potentially affecting the expression of the metabolites and functionality of the bound G-quadruplexes.


    Organizational Affiliation

    NTU Institute of Structural Biology , Nanyang Technological University , Singapore 636921 , Singapore.



Macromolecules
  • Find similar nucleic acids by: Sequence   |   Structure
Entity ID: 1
MoleculeChainsLengthOrganism
DNA (5'-D(*TP*TP*GP*GP*TP*GP*GP*GP*TP*GP*GP*GP*TP*GP*GP*GP*T)-3')A17synthetic construct
  • Find similar nucleic acids by: Sequence   |   Structure
Entity ID: 2
MoleculeChainsLengthOrganism
DNA (5'-D(*AP*G)-3')B2synthetic construct
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 
  • OLDERADO: 6K3X Olderado

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Singapore--

Revision History 

  • Version 1.0: 2020-01-15
    Type: Initial release