[5-³H]-deoxycytidine | 25352-62-9

• 分子结构分类: 有机化合物 - 核苷、核苷酸和类似物 - 嘧啶核苷
• 英文名称: [5-³H]-deoxycytidine
• 英文别名: Desoxycytidin-5-T；5-[³H]-2'-deoxy-cytidine；Deoxycytidine, [5-3H]；1-[(2R,4S,5R)-4-hydroxy-5-(hydroxymethyl)oxolan-2-yl]-4-imino-5-tritiopyrimidin-2-one
• CAS: 25352-62-9
• 化学式: C₉H₁₃N₃O₄
• 分子量: 229.212
• InChiKey: CKTSBUTUHBMZGZ-ULQXZJNLSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -1.8
• 重原子数：
  16
• 可旋转键数：
  2
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.56
• 拓扑面积：
  108
• 氢给体数：
  3
• 氢受体数：
  4

反应信息

• 作为试剂：
  描述：

  2'-deoxyadenosine-3'-triphosphate 在 human cytidine kinase 、 [5-³H]-deoxycytidine 作用下， 以 水 为溶剂， 生成 2'-deoxyadenosine-3'-diphosphate
  参考文献：
  名称：

  Striking Ability of Adenosine-2′(3′)-deoxy-3′(2′)-triphosphates and Related Analogues to Replace ATP as Phosphate Donor for All Four Human, and theDrosophila Melanogaster, Deoxyribonucleoside Kinases

  摘要：

  In extension of an earlier report, six non-conventional analogues of ATP, three adenosine-2'-triphosphates (3'-deoxy, 3'-deoxy-3'-fluoro- and 3'-deoxy-3'-fluoroxylo-), and three adenosine-3'-triphosphates (2'-deoxy-, 2'-deoxy-2'-fluoro- and 2'-deoxy-2'-fluoroara-), were compared with ATP as potential phosphate donors for human deoxycytidine kinase (dCK), cytosolic thymidine kinase (TK1), mitochondrial TK2, deoxyguanosine kinase (dGK), and the deoxyribonucleoside kinase (dNK) from Drosophila melanogaster. With one group of enzymes, comprising TK1, TK2, dNK and dCK (with dAdo as acceptor), only 3'-deoxyadenosine-2'-triphosphate was an effective donor (5-60% that for ATP), and the other five analogues much less so, or inactive. With a second set, including dCK (dCyd, but not dAdo, as acceptor) and dGK (dGuo as acceptor), known to share high sequence similarity (approximate to 45% sequence identity), all six analogues were good to excellent donors (13-119% that for ATP). With dCK and ATP1, products were shown to be 5'-phosphates. With dCK, donor properties of the analogues were dependent on the nature of the acceptor, as with natural 5'-triphosphate donors. With dCK (dCyd as acceptor), K-m and V-max for the two 2'(3)deoxyadenosine-3'(2')-triphosphates are similar to those for ATP. With dGK, K-m values are higher than for ATP, while V-max values are comparable. Kinetic studies further demonstrated Michaelis-Menten (non-cooperative) or cooperative kinetics, dependent on the enzyme employed and the nature of the donor. The physiological significance, if any, of the foregoing remains to be elucidated. The overall results are, on the other hand, highly relevant to studies on the modes of interaction of nucleoside kinases with donors and acceptors; and, in particular, to interpretations of the recently reported crystal structures of dGK with bound ATP, of dNK with bound dCyd, and associated modeling studies.

  DOI：

  10.1081/ncn-120019510