2021
G-Quadruplex Formation by DNA Sequences Deficient in Guanines: Two Tetrad Parallel Quadruplexes Do Not Fold Intramolecularly
KEJNOVSKA, I., P. STADLBAUER, Lukáš TRANTÍREK, D. RENCIUK, Martin GAJARSKÝ et. al.Základní údaje
Originální název
G-Quadruplex Formation by DNA Sequences Deficient in Guanines: Two Tetrad Parallel Quadruplexes Do Not Fold Intramolecularly
Autoři
KEJNOVSKA, I., P. STADLBAUER, Lukáš TRANTÍREK (203 Česká republika, garant, domácí), D. RENCIUK, Martin GAJARSKÝ (703 Slovensko, domácí), Daniel KRAFČÍK (703 Slovensko, domácí), J. PALACKY, K. BEDNAROVA, J. SPONER, J.L. MERGNY a M. VORLICKOVA
Vydání
Chemistry - A European Journal, WEINHEIM, Wiley, 2021, 0947-6539
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10400 1.4 Chemical sciences
Stát vydavatele
Německo
Utajení
není předmětem státního či obchodního tajemství
Odkazy
Impakt faktor
Impact factor: 5.020
Kód RIV
RIV/00216224:14740/21:00120225
Organizační jednotka
Středoevropský technologický institut
UT WoS
000674838100001
Klíčová slova anglicky
CD spectroscopy; DNA quadruplexes; G-quartets; nucleic acid folding; molecular dynamics calculations; NMR spectroscopy
Štítky
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 26. 2. 2022 10:43, Mgr. Pavla Foltynová, Ph.D.
Anotace
V originále
Guanine quadruplexes (G4s) are noncanonical forms of nucleic acids that are frequently found in genomes. The stability of G4s depends, among other factors, on the number of G-tetrads. Three- or four-tetrad G4s and antiparallel two-tetrad G4s have been characterized experimentally; however, the existence of an intramolecular (i. e., not dimeric or multimeric) two-tetrad parallel-stranded DNA G4 has never been experimentally observed. Many sequences compatible with two-tetrad G4 can be found in important genomic regions, such as promoters, for which parallel G4s predominate. Using experimental and theoretical approaches, the propensity of the model sequence AATGGGTGGGTTTGGGTGGGTAA to form an intramolecular parallel-stranded G4 upon increasing the number of GGG-to-GG substitutions has been studied. Deletion of a single G leads to the formation of intramolecular G4s with a stacked G-triad, whose topology depends on the location of the deletion. Removal of another guanine from another G-tract leads to di- or multimeric G4s. Further deletions mostly prevent the formation of any stable G4. Thus, a solitary two-tetrad parallel DNA G4 is not thermodynamically stable and requires additional interactions through capping residues. However, transiently populated metastable two-tetrad species can associate to form stable dimers, the dynamic formation of which might play additional delicate roles in gene regulation. These findings provide essential information for bioinformatics studies searching for potential G4s in genomes.
Návaznosti
NV19-08-00450, projekt VaV |
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