7DFY

Novel motif for left-handed G-quadruplex formation

PDB DOI: https://doi.org/10.2210/pdb7DFY/pdb
NAKB: 7DFY

Classification: DNA
Organism(s): synthetic construct
Mutation(s): No

Deposited: 2020-11-10 Released: 2021-09-01
Deposition Author(s): Das, P., Winnerdy, F.R., Maity, A., Mechulam, Y., Phan, A.T.
Funding Organization(s): National Research Foundation (NRF, Singapore), Ministry of Education (MoE, Singapore)

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 1.69 Å
R-Value Free: 0.259
R-Value Work: 0.201
R-Value Observed: 0.204

wwPDB Validation 3D Report Full Report

This is version 1.1 of the entry. See complete history.

Literature

A novel minimal motif for left-handed G-quadruplex formation.

Das, P., Winnerdy, F.R., Maity, A., Mechulam, Y., Phan, A.T.

(2021) Chem Commun (Camb) 57: 2527-2530

PubMed: 33690751 Search on PubMed
DOI: https://doi.org/10.1039/d0cc08146a
Primary Citation of Related Structures:
7DFY

PubMed Abstract:
A recent study on the left-handed G-quadruplex (LHG4) DNA revealed a 12-nt minimal motif GTGGTGGTGGTG with the ability to independently form an LHG4 and to drive an adjacent sequence to LHG4 formation. Here we have identified a second LHG4-forming motif, GGTGGTGGTGTG, and determined the X-ray crystal structure of an LHG4 involving this motif. Our structural analysis indicated the role of split guanines and single thymine loops in promoting LHG4 formation.

Organizational Affiliation

School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore. phantuan@ntu.edu.sg.

Macromolecule Content

Total Structure Weight: 17.87 kDa
Atom Count: 1,207
Modelled Residue Count: 52
Deposited Residue Count: 52
Unique nucleic acid chains: 1

Macromolecules

Find similar nucleic acids by:

(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Length	Organism	Image
2xMotif2	A, B	26	synthetic construct
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
MPD Query on MPD Download Ideal Coordinates CCD File SDF format, chain Q [auth A] MOL2 format, chain Q [auth A]	Q [auth A]	(4S)-2-METHYL-2,4-PENTANEDIOL C₆ H₁₄ O₂ SVTBMSDMJJWYQN-YFKPBYRVSA-N		Interactions Focus chain Q [auth A] Interactions & Density Focus chain Q [auth A]
SR Query on SR Download Ideal Coordinates CCD File SDF format, chain I [auth A] SDF format, chain J [auth A] SDF format, chain K [auth A] SDF format, chain L [auth A] SDF format, chain M [auth A] SDF format, chain N [auth A] SDF format, chain O [auth A] SDF format, chain P [auth A] SDF format, chain W [auth B] MOL2 format, chain I [auth A] MOL2 format, chain J [auth A] MOL2 format, chain K [auth A] MOL2 format, chain L [auth A] MOL2 format, chain M [auth A] MOL2 format, chain N [auth A] MOL2 format, chain O [auth A] MOL2 format, chain P [auth A] MOL2 format, chain W [auth B]	I [auth A] J [auth A] K [auth A] L [auth A] M [auth A] I [auth A], J [auth A], K [auth A], L [auth A], M [auth A], N [auth A], O [auth A], P [auth A], W [auth B]	STRONTIUM ION Sr PWYYWQHXAPXYMF-UHFFFAOYSA-N		Interactions Focus chain I [auth A] Focus chain J [auth A] Focus chain K [auth A] Focus chain L [auth A] Focus chain M [auth A] Focus chain N [auth A] Focus chain O [auth A] Focus chain P [auth A] Focus chain W [auth B] Interactions & Density Focus chain I [auth A] Focus chain J [auth A] Focus chain K [auth A] Focus chain L [auth A] Focus chain M [auth A] Focus chain N [auth A] Focus chain O [auth A] Focus chain P [auth A] Focus chain W [auth B]
K Query on K Download Ideal Coordinates CCD File SDF format, chain C [auth A] SDF format, chain D [auth A] SDF format, chain E [auth A] SDF format, chain F [auth A] SDF format, chain G [auth A] SDF format, chain H [auth A] SDF format, chain R [auth B] SDF format, chain S [auth B] SDF format, chain T [auth B] SDF format, chain U [auth B] SDF format, chain V [auth B] MOL2 format, chain C [auth A] MOL2 format, chain D [auth A] MOL2 format, chain E [auth A] MOL2 format, chain F [auth A] MOL2 format, chain G [auth A] MOL2 format, chain H [auth A] MOL2 format, chain R [auth B] MOL2 format, chain S [auth B] MOL2 format, chain T [auth B] MOL2 format, chain U [auth B] MOL2 format, chain V [auth B]	C [auth A] D [auth A] E [auth A] F [auth A] G [auth A] C [auth A], D [auth A], E [auth A], F [auth A], G [auth A], H [auth A], R [auth B], S [auth B], T [auth B], U [auth B], V [auth B]	POTASSIUM ION K NPYPAHLBTDXSSS-UHFFFAOYSA-N		Interactions Focus chain C [auth A] Focus chain D [auth A] Focus chain E [auth A] Focus chain F [auth A] Focus chain G [auth A] Focus chain H [auth A] Focus chain R [auth B] Focus chain S [auth B] Focus chain T [auth B] Focus chain U [auth B] Focus chain V [auth B] Interactions & Density Focus chain C [auth A] Focus chain D [auth A] Focus chain E [auth A] Focus chain F [auth A] Focus chain G [auth A] Focus chain H [auth A] Focus chain R [auth B] Focus chain S [auth B] Focus chain T [auth B] Focus chain U [auth B] Focus chain V [auth B]