Biological Degradation of Taxol by Action of Cultured Cells on 7-Acetyltaxol-2″-yl Glucoside
作者:Kei Shimoda、Katsuhiko Mikuni、Kiyoshi Nakajima、Hatsuyuki Hamada、Hiroki Hamada
DOI:10.1246/cl.2008.362
日期:2008.3.5
Biodegradation pathways of taxol in cultured cells of Synechocystis sp. PCC 6803, Synechococcus sp. PCC 7942, Marchantia polymorpha, Nicotiana tabacum, and Glycine max were investigated using a water-soluble taxol derivative, 7-acetyltaxol-2″-yl glucoside, as the substrate. Although cyanobacteria, Synechocystis sp. PCC 6803 and Synechococcus sp. PCC 7942, and a lower plant, M. polymorpha, catalyzed the epimerization at 7-position of taxol skeleton, no epimerization occurred with higher plants, N. tabacum and G. max. On the other hand, Synechocystis sp. PCC 6803, Synechococcus sp. PCC 7942, M. polymorpha, and N. tabacum catalyzed hydrolysis at 13-position of taxol to give baccatin III and 10-deacetyl baccatin III. Both cyanobacteria cells also deacetylated 7-epi-baccatin III at its 10-position. M. polymorpha and G. max deacetylated at 10-position of taxol.
以水溶性紫杉醇衍生物7-乙酰基紫杉醇-2″-基葡萄糖苷为底物,研究了紫杉醇在合子囊藻(PCC 6803)、合子藻(PCC 7942)、多形马钱子(Marchantia polymorpha)、烟草(Nicotiana tabacum)和黄豆(Glycine max)培养细胞中的生物降解途径。虽然蓝藻合子囊藻(PCC 6803)和合子藻(PCC 7942)以及低等植物多形马钱子(Marchantia polymorpha)催化了紫杉醇骨架7位上的对映异构化,但高等植物烟草(Nicotiana tabacum)和黄豆(Glycine max)则没有发生对映异构化。另一方面,合子囊藻(PCC 6803)、合子藻(PCC 7942)、多形马钱子(Marchantia polymorpha)和烟草(Nicotiana tabacum)催化了紫杉醇13位的水解,生成巴卡丁III和10-脱乙酰基巴卡丁III。两种蓝藻细胞还脱乙酰化了7-epi-巴卡丁III的10位。多形马钱子(Marchantia polymorpha)和黄豆(Glycine max)