8-(2''-hydroxyphenyl)-2'-deoxyguanosine | 143084-41-7

• 分子结构分类: 有机化合物 - 核苷、核苷酸和类似物 - 嘌呤核苷
• 英文名称: 8-(2''-hydroxyphenyl)-2'-deoxyguanosine
• 英文别名: 8-(2''-hydroxyphenyl)-dG；2-amino-9-[(2R,4S,5R)-4-hydroxy-5-(hydroxymethyl)oxolan-2-yl]-8-(2-hydroxyphenyl)-1H-purin-6-one
• CAS: 143084-41-7
• 化学式: C₁₆H₁₇N₅O₅
• 分子量: 359.341
• InChiKey: HEDXUVPLJBKTCQ-HBNTYKKESA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.5
• 重原子数：
  26
• 可旋转键数：
  3
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.31
• 拓扑面积：
  155
• 氢给体数：
  5
• 氢受体数：
  7

反应信息

• 作为反应物：
  描述：

  8-(2''-hydroxyphenyl)-2'-deoxyguanosine 在 盐酸 作用下， 以 水 为溶剂， 生成 2-Amino-8-(2-hydroxyphenyl)-1,7-dihydropurin-6-one
  参考文献：
  名称：

  关于8芳基-2'-脱氧鸟苷核苷加合物的水解稳定性：生理pH下无碱基位点形成的意义。

  摘要：

  将芳基自由基种直接加到2'-脱氧鸟苷（dG）的C 8位上可得到C 8-芳基-dG加合物，其由致癌的芳基肼，多环芳烃（PAH）和某些酚类毒素产生。C 8-芳基嘌呤加合的共同性质是无碱基位点形成的伴随。为了确定C 8-芳基部分如何导致糖损失，已使用紫外可见光谱法确定N 7 p K a1值和水解动力学，同时利用密度泛函理论（DFT）计算来探究结构特征和C 8的稳定性带有不同对和邻取代基的-芳基-dG加合物。在所有情况下，将C 8 -芳基-dG加合物采取顺含有强ø构象5 '-H···Ñ 3氢与相对于所述核碱基扭曲芳环键。该加合物经历Ñ 7 -protonation与电离常数和n计算7质子亲和力（PA）值类似于用于dG的测量。水解动力学表明，C 8-芳基-dG核苷加合物比dG更易于酸催化水解，其中带有对位取代基的k 1值为ca。比k 1大90至200倍对于dG，对原加合物的作用仅约。大9至60倍。通

  DOI：

  10.1021/jo901080w
• 作为产物：
  描述：

  2'-脱氧鸟苷 在 N-溴代丁二酰亚胺(NBS) 、 trisodium tris(3-sulfophenyl)phosphine 、 palladium diacetate 作用下， 以 水 、 乙腈 为溶剂， 生成 8-(2''-hydroxyphenyl)-2'-deoxyguanosine
  参考文献：
  名称：

  Fluorescent Properties and Conformational Preferences of C-Linked Phenolic-DNA Adducts

  摘要：

  Phenolic toxins and mutagenic diazoquinones generate C-linked adducts at the C8 site of 2'-deoxyguanosine (dG) through the intermediacy of radical species. We have previously reported the site-specific incorporation of these adducts into oligonucleotides using a postsynthetic palladium-catalyzed cross-coupling strategy [Omumi et al. (2011) J. Am. Chem. Soc. 133, 42-50]. We report here the structural impact of these lesions within two decanucleotide sequences containing either 5'- and 3'-flanking pyrimidines or purines. In the complementary strands, the base opposite (N) the C-linked adduct was varied to determine the possibility of mismatch stabilization by the modified nucleobases. The resulting adducted duplex structures were characterized using UV thermal denaturation studies, circular dichroism, fluorescence spectroscopy, and molecular dynamics (MD) simulations. The experimental data showed the C-linked adducts to destabilize the duplex when base paired with its normal partner C but to increase duplex stability within a G:G mismatch. The stabilization within the G:G mismatch was sequence dependent, with flanking purine bases playing a key role in the stabilizing influence of the adduct. MD simulations showed no large structural changes to the B form double helix, regardless of the (anti/syn) adduct preference. Consideration of H-bonding and stacking interactions derived from the MD simulations together with the thermal melting data and changes in fluorescent emission of the adducts upon hybridization to the complementary strands implied that the C-linked phenolic adducts preferentially adopt the syn-conformation within both duplexes regardless of the opposite base N. Given that biological outcome in terms of mutagenicity appears to be strongly correlated to the conformational preference of the corresponding N-linked C8-dG adducts, the potential biological implications of phenolic C-linked adducts are discussed.

  DOI：

  10.1021/tx200247f