The beginning and the end: flanking nucleotides induce a parallel G-quadruplex topology.
The beginning and the end: flanking nucleotides induce a parallel G-quadruplex topology.
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开始和结束:侧翼核苷酸诱导平行的 G-四链体拓扑
DOI:
10.1093/nar/gkab681
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发表时间:
2021-09-20
影响因子:
14.9
通讯作者:
Zhou J
中科院分区:
文献类型:
--
作者:
Chen J;Cheng M;Salgado GF;Stadlbauer P;Zhang X;Amrane S;Guédin A;He F;Šponer J;Ju H;Mergny JL;Zhou J
Abstract Genomic sequences susceptible to form G-quadruplexes (G4s) are always flanked by other nucleotides, but G4 formation in vitro is generally studied with short synthetic DNA or RNA oligonucleotides, for which bases adjacent to the G4 core are often omitted. Herein, we systematically studied the effects of flanking nucleotides on structural polymorphism of 371 different oligodeoxynucleotides that adopt intramolecular G4 structures. We found out that the addition of nucleotides favors the formation of a parallel fold, defined as the ‘flanking effect’ in this work. This ‘flanking effect’ was more pronounced when nucleotides were added at the 5′-end, and depended on loop arrangement. NMR experiments and molecular dynamics simulations revealed that flanking sequences at the 5′-end abolish a strong syn-specific hydrogen bond commonly found in non-parallel conformations, thus favoring a parallel topology. These analyses pave a new way for more accurate prediction of DNA G4 folding in a physiological context.
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影响因子:
14.9
作者:
Mergny JL;Li J;Lacroix L;Amrane S;Chaires JB
通讯作者:
Chaires JB
影响因子:
14.9
作者:
Cang X;Šponer J;Cheatham TE 3rd
通讯作者:
Cheatham TE 3rd
影响因子:
46.9
作者:
Chambers, Vicki S.;Marsico, Giovanni;Balasubramanian, Shankar
通讯作者:
Balasubramanian, Shankar
DOI:
10.1038/nsb0597-382
发表时间:
1997-05-01
期刊:
NATURE STRUCTURAL BIOLOGY
影响因子:
--
作者:
Kettani, A;Bouaziz, S;Patel, DJ
通讯作者:
Patel, DJ
影响因子:
13.6
作者:
Dvorkin SA;Karsisiotis AI;Webba da Silva M
通讯作者:
Webba da Silva M