ISDA: 6TC8

Deposition Date 2019-11-05

Release Date 2020-03-25

Last Version Date 2024-05-15

Entry Detail

PDB ID:

6TC8

Keywords:

DNA

Title:

2'-F-arabinoguanosine and 2'-F-riboguanosine modified hybrid type G-quadruplex with V-loop

Biological Source:

Source Organism:

synthetic construct (Taxon ID: 32630)

Method Details:

Experimental Method:

SOLUTION NMR

Conformers Calculated:

Conformers Submitted:

Selection Criteria:

all calculated structures submitted

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Macromolecular Entities

Polymer Type:polydeoxyribonucleotide
Molecule:DNA (5'-D(*GP*GP*GP*AP*TP*GP*GP*GP*AP*CP*AP*CP*AP*(GFL)P*(GF2)P*GP*GP*AP*CP*GP*GP*G)-3')
Chain IDs:A
Chain Length:22
Number of Molecules:1
Biological Source:synthetic construct

Ligand Molecules

Primary Citation

Switching the type of V-loop in sugar-modified G-quadruplexes through altered fluorine interactions.

Haase, L, Weisz, K.Show

Chem.Commun.(Camb.) 56 4539 4542 (2020)

PMID: 32202271 DOI: 10.1039/d0cc01285h

Abstact

Mixed 2'-F-riboguanosine and 2'-F-arabinoguanosine disubstitutions of a hybrid-type G-quadruplex are found to induce a refolding into two alternative structures with different types of V-loops upon positional exchange of the two G analogs. While conformational preferences of the incorporated G surrogates fail to fully account for the observed rearrangements, additional hydrogen bonds with a fluorine acceptor are suggested to be critical determinants of the two distinct V-loop conformers imposing different tetrad polarities.

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Protein

Chemical

Disease

Primary Citation of related structures