ISDA

Entry Detail

PDB ID:

7DFY

Keywords:

DNA

Title:

Novel motif for left-handed G-quadruplex formation

Biological Source:

Source Organism:

synthetic construct

PDB Version:

Deposition Date:

2020-11-10

Release Date:

2021-09-01

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.69 Å

R-Value Free:

0.25

R-Value Work:

0.20

R-Value Observed:

0.20

Space Group:

P 1 21 1

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Macromolecular Entities

Polymer Type:polydeoxyribonucleotide
Description:2xMotif2
Chain IDs:A, B
Chain Length:26
Number of Molecules:2
Biological Source:synthetic construct

Ligand Molecules

MPD

Primary Citation

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

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

Chem.Commun.(Camb.) 57 2527 2530 (2021)

PMID: 33690751 DOI: 10.1039/d0cc08146a

Abstact

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.

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Protein

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Disease

Primary Citation of related structures