DNA triplex formation with 5-dimethylaminopropargyl deoxyuridine.

DNA triplex formation with 5-dimethylaminopropargyl deoxyuridine.
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DOI:
10.1093/nar/gkn1060
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发表时间:
2009-03
影响因子:
14.9
通讯作者:
Brown T
Brown T
中科院分区:
生物学2区
文献类型:
--
作者:
Rusling DA;Peng G;Srinivasan N;Fox KR;Brown T

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我们已经准备了三链体形成的寡核苷酸含有核苷酸类似物5-二甲基氨基炔丙基脱氧尿苷(DMAPdU)代替胸苷,并检查其能力,形成分子间的三股螺旋的热熔融和DNA酶I足迹的研究。并与含5-氨基炔丙基-dU(APdU)、5-胍基炔丙基-dU(GPDU)和5-丙炔基-dU(PdU)的寡核苷酸的结果进行了比较。我们发现DMAPdU相对于T增强了三链体稳定性,尽管比携带正电荷的其他类似物(T << PdU < DMAPdU < APdU < GPDU)略低。对于含有用DMAPdU的多个取代的寡核苷酸,分散的残基比成簇的组合更有效。DMAPdU作为核苷酸类似物将是特别有用的,因为与APDU和GPDU不同,碱基在寡核苷酸合成期间不需要保护,因此它可以与需要温和脱保护条件的其他衍生物一起使用。
We have prepared triplex-forming oligonucleotides containing the nucleotide analogue 5-dimethylaminopropargyl deoxyuridine (DMAPdU) in place of thymidine and examined their ability to form intermolecular triple helices by thermal melting and DNase I footprinting studies. The results were compared with those for oligonucleotides containing 5-aminopropargyl-dU (APdU), 5-guanidinopropargyl-dU (GPdU) and 5-propynyl dU (PdU). We find that DMAPdU enhances triplex stability relative to T, though slightly less than the other analogues that bear positive charges (T << PdU < DMAPdU < APdU < GPdU). For oligonucleotides that contain multiple substitutions with DMAPdU dispersed residues are more effective than clustered combinations. DMAPdU will be especially useful as a nucleotide analogue as, unlike APdU and GPdU, the base does not require protection during oligonucleotide synthesis and it can therefore be used with other derivatives that require mild deprotection conditions.
DOI: 10.1093/nar/gki254
发表时间: 2005-01-01
影响因子: 14.9
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