Microbial Mannosidation of Bioactive Chlorogentisyl Alcohol by the Marine-Derived Fungus Chrysosporium synchronum
作者:Keumja Yun、Chinni Mahesh Kondempudi、Hong Dae Choi、Jung Sook Kang、Byeng Wha Son
DOI:10.1248/cpb.59.499
日期:——
The biological transformation of the biologically active chlorogentisyl alcohol (1), isolated from the marine-derived fungus Aspergillus sp., was studied. Preparative-scale fermentation of chlorogentisyl alcohol with marine-derived fungus Chrysosporium synchronum resulted in the isolation of a new glycosidic metabolite, 1-O-(α-D-mannopyranosyl)chlorogentisyl alcohol (2). The stereostructure of the new metabolite obtained was assigned on the basis of detailed spectroscopic data analyses, chemical reaction, and chemical synthesis. Compounds 1 and 2 exhibited significant radical-scavenging activity against 1,1-diphenyl-2-picrylhydrazyl radical (DPPH) with IC50 values of 1.0 and 4.7 μM, respectively. The compounds 1 and 2 were more active than the positive control, L-ascorbic acid (IC50, 20.0 μM).
从海洋来源的真菌曲霉(Aspergillus sp.)中分离得到的生物活性化合物氯羟苯丙醇(1)的生物转化研究已被进行。通过海洋来源的真菌金孢虫草(Chrysosporium synchronum)对氯羟苯丙醇进行制备规模的发酵,成功分离出了一种新的糖苷代谢产物,即1-O-(α-D-甘露糖苷)氯羟苯丙醇(2)。通过对详尽的光谱数据分析、化学反应和化学合成,确定了新代谢产物的立体结构。化合物1和2对1,1-二苯基-2-苦基肼基自由基(DPPH)显示出显著的自由基清除活性,其IC50值分别为1.0和4.7 μM。化合物1和2的活性均优于阳性对照L-抗坏血酸(IC50为20.0 μM)。