Microbiological Transformation of Ginsenoside Rg1

论文首次报道了利用49种微生物菌株对人参皂苷Rg1进行生物转化研究,发现小型丝状真菌黑曲霉(Aspergillusniger 3.1858)与蓝色梨头霉(Absidia coerulea 3.3538)具有转化能力.经正交试验优化转化条件,放大培养,制备得到产物MT1与MT2,经化学与波谱技术鉴定,MT1与MT2为同一产物即人参皂苷Rh1.运用TLCS方法探索了真菌体系中底物人参皂苷Rg1与转化产物人参皂苷Rh1的生物转化动力学曲线.Forty-nine microbial strains were used to screen their ability for the microbiological transformation of ginsenoside Rg1@ Aspergillus niger (3.1858) and Absidia coerulea (3.3538) were found to convert ginsenoside Rg1 efficiently to less polar metabolites. Preparative scale transformation with both fungi Absidia coerulea (3.3538)and Aspergillus niger (3.1858) have resulted in the production of one same metabolite (MT l). Its structure was characterized as 6-O-β-D-glucopyranosyl-20(S)-protopanaxatriol (Ginsenoside Rh1) on the basis of its TOF-MS and 1H,13C NMR spectral data. The biotransformation kinetic curves for Ginsenoside Rg1 and MT1 were reported for the first time,and the biotransformation pathway was proposed.03115-1181