对映体纯、受保护的 GNA 型无环核苷(乙二醇核酸)( G N'),从 ( R )-(+)- 和 ( S )-(−)-缩水甘油和四个典型 DNA 核碱基 (Ade、 Cyt、Gua 和 Thy)被转化为 3'- O -DMT 保护的 2-硫代-4,4-五亚甲基-1,3,2-氧杂硫磷烷衍生物 (OTP- G N'),其在磷原子。这些单体通过色谱分离成P-非对映异构体,进一步用于合成P-立体定义的“二核苷”硫代磷酸酯G N PS T ( G N = G A, G C, G G, G T)。所有八个G N PS T 的磷原子的绝对构型均通过酶法建立并经过化学验证,并与 OTP- G N' 单体在硅胶上的色谱迁移率相关。 G N PS单元(源自 ( R )-(+)-缩水甘油)被引入自互补 PS-(DNA/GNA) 八聚体中,该八聚体具有预选的 P 原子绝对构型。 热解离实验表明,双链体的热力学稳定
Chirality Dependent Potency Enhancement and Structural Impact of Glycol Nucleic Acid Modification on siRNA
作者:Mark K. Schlegel、Donald J. Foster、Alexander V. Kel’in、Ivan Zlatev、Anna Bisbe、Muthusamy Jayaraman、Jeremy G. Lackey、Kallanthottathil G. Rajeev、Klaus Charissé、Joel Harp、Pradeep S. Pallan、Martin A. Maier、Martin Egli、Muthiah Manoharan
DOI:10.1021/jacs.7b02694
日期:2017.6.28
hydrogen bonding of an adjacent basepair. In addition, the GNA-T nucleobase adopts a rotated conformation in which the 5-methyl group points into the minor groove, rather than the major groove as in a normal Watson-Crick basepair. This observation of reverse Watson-Crick basepairing is further supported by thermal melting analysis of GNA-C and GNA-G containing duplexes where it was demonstrated that
Enantiospecific formation of a metal-mediated base pair inside a DNA duplex
作者:Biswarup Jash、Johannes Neugebauer、Jens Müller
DOI:10.1016/j.ica.2016.02.012
日期:2016.10
Abstract The metal-mediated basepair P–Ag(I)–P involving the bidentate ligand 1 H -imidazo[4,5- f ][1,10]phenanthroline (P) was investigated within a B-DNA duplex. The underlying tetrahedral complex exists as a pair of enantiomers. Interestingly, one of the isomers forms preferentially within the B-DNA context, as was shown in a combined computational and experimental approach by means of circular
The barbituric acid merocyanine (BAM) is reported as a nucleobase surrogate that forms hydrogen-bondedbasepairs, and antiparallel as well as rotationally stacked dimer aggregates, with orientation- and conformation-sensitive exciton coupling strength.
[EN] OLIGONUCLEOTIDE COMPOSITIONS AND METHODS THEREOF<br/>[FR] COMPOSITIONS D'OLIGONUCLÉOTIDES ET PROCÉDÉS ASSOCIÉS
申请人:WAVE LIFE SCIENCES LTD
公开号:WO2022099159A1
公开(公告)日:2022-05-12
Among other things, the present disclosure provides oligonucleotides and compositions thereof. In some embodiments, provided oligonucleotides and compositions are useful for adenosine modification. In some embodiments, the present disclosure provides methods for treating various conditions, disorders or diseases that can benefit from adenosine modification.
Alternating co-synthesis of glycol nucleic acid (GNA) monomers with dicarboxylic acids <i>via</i> drying
作者:Ruiqin Yi、Tony Z. Jia、Markus Meringer、Luke K. Marshall、Chen Chen、Shawn Erin McGlynn、Albert C. Fahrenbach、H. James Cleaves
DOI:10.1039/d2cc06818d
日期:——
We report the co-polymerization of glycol nucleicacid (GNA) monomers with unsubstituted and substituted dicarboxylic acid linkers under plausible early Earth aqueous dry-down conditions. Both linear and branched co-polymers are produced. Mechanistic aspects of the reaction and potential roles of these polymers in prebiotic chemistry are discussed.