Enzymatic phosphorylation of the antiherpetic agent 9-[(2,3-dihydroxy-1-propoxy)methyl]guanine
作者:J. D. Karkas、W. T. Ashton、L. F. Canning、R. Liou、J. Germershausen、R. Bostedor、B. Arison、A. K. Field、R. L. Tolman
DOI:10.1021/jm00155a039
日期:1986.5
nine (iNDG) is phosphorylated by HSV1 thymidine kinase, and its phosphorylated products inhibit DNA polymerase activity. iNDG exists in two enantiomeric forms, each with a primary and a secondary hydroxyl; thus, a number of possibilities for preferential phosphorylation exist, which were explored in this study. HSV1 thymidine kinase phosphorylates the primary hydroxyl of both the R and the S isomers
抗疱疹药9-[((2,3-二羟基-1-丙氧基)甲基]鸟嘌呤(iNDG)被HSV1胸苷激酶磷酸化,其磷酸化产物抑制DNA聚合酶活性。iNDG以两种对映体形式存在,分别具有伯羟基和仲羟基。因此,存在许多优先磷酸化的可能性,本研究对此进行了探讨。HSV1胸苷激酶使iNDG的R和S异构体的伯羟基磷酸化。通过与其中伯羟基或仲羟基被氟或氢代替的类似物进行比较以及通过对单磷酸盐的NMR谱进行研究来确定这一点。GMP激酶将R和S单磷酸磷酸化为相应的二磷酸。然而,S的进一步磷酸化比R的异构体有效得多。此外,(S)-iNDG三磷酸酯比(R)-iNDG三磷酸酯更有效地抑制HSV1 DNA聚合酶。两种异构体的生化特异性的这些差异说明了与(R)-iNDG相比,观察到的(S)-iNDG更高的抗病毒效力。