protoprogenin II

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 类固醇和类固醇衍生物
• 英文名称: protoprogenin II
• 英文别名: (2S,3R,4R,5R,6S)-2-[(2R,3S,4R,5R,6R)-4,5-dihydroxy-2-(hydroxymethyl)-6-[[(1S,2S,4S,6R,7S,8R,9S,12S,13R,16S)-6-hydroxy-7,9,13-trimethyl-6-[(3R)-3-methyl-4-[(2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxybutyl]-5-oxapentacyclo[10.8.0.02,9.04,8.013,18]icos-18-en-16-yl]oxy]oxan-3-yl]oxy-6-methyloxane-3,4,5-triol
• 化学式: C₄₅H₇₄O₁₈
• 分子量: 903.072
• InChiKey: RKFMVZQLJBGJKK-YGXMXTOKSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.2
• 重原子数：
  63
• 可旋转键数：
  12
• 环数：
  8.0
• sp3杂化的碳原子比例：
  0.96
• 拓扑面积：
  287
• 氢给体数：
  11
• 氢受体数：
  18

反应信息

• 作为反应物：
  描述：

  protoprogenin II 在 Curvularia lunata 3.4381 1,4-α-D-glucan glucohydrolase 作用下， 以 phosphate buffer 为溶剂， 反应 6.0h， 以13.8 mg的产率得到diosgenin 3-O-α-L-rhamnopyranosyl(1->4)-β-D-glucopyranoside
  参考文献：
  名称：

  The substrate specificity of a glucoamylase with steroidal saponin-rhamnosidase activity from Curvularia lunata

  摘要：

  In previous work, we studied and reported that an enzyme from Curvularia lunata 3.4381 had the novel specificity to hydrolyze the terminal rhamnosyl at C-3 position of steroidal saponin and obtained four transformed products; the enzyme was purified and ascertained as glucoamylase (EC 3.2.1.3 GA). In this work, the enzyme exhibiting steroidal saponin-rhamnosidase activity was systematically studied on 21 steroidal saponins and 6 ginsenosides. The results showed that the alpha-1,2-linked end-rhamnosyl residues at C-3 position of steroidal saponins could be hydrolyzed to corresponding secondary steroidal saponins, among which 18 compounds were isolated and identified, including 3 new secondary compounds. For the furostanosides having glucosyl residues at the C-26 position, hydrolysis occurred first at end- rhamnosyl at C-3 position to produce secondary furostanosides. The reaction of hydrolyzing glucosyl at C-26 position depended considerably on longer reaction times yielding the corresponding secondary spirostanosides ( without rhamnosyl and glucosyl residues). The enzyme had the strict specificity for the terminal alpha-1,2-linked rhamnosyl residues of linear chain, or the terminal alpha-1,2-linked rhamnosyl residues with branched chain of 1,4-linked glycosyl residues of sugar chain at C-3 position of steroidal saponins, it was not specific for different aglycones, different glycons, and the number of glycon of sugar chain of steroidal saponin. The end- rhamnosyl of ginsenosides and p-nitrophenyl-a-L-rhamnopyranoside (pNPR) could not be hydrolyzed by the enzyme from C. lunata. (c) 2007 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2007.04.076
• 作为产物：
  描述：

  原薯蓣皂苷 在 Curvularia lunata 3.4381 1,4-α-D-glucan glucohydrolase 作用下， 以 phosphate buffer 为溶剂， 反应 6.0h， 以68.4 mg的产率得到protoprogenin II
  参考文献：
  名称：

  The substrate specificity of a glucoamylase with steroidal saponin-rhamnosidase activity from Curvularia lunata

  摘要：

  In previous work, we studied and reported that an enzyme from Curvularia lunata 3.4381 had the novel specificity to hydrolyze the terminal rhamnosyl at C-3 position of steroidal saponin and obtained four transformed products; the enzyme was purified and ascertained as glucoamylase (EC 3.2.1.3 GA). In this work, the enzyme exhibiting steroidal saponin-rhamnosidase activity was systematically studied on 21 steroidal saponins and 6 ginsenosides. The results showed that the alpha-1,2-linked end-rhamnosyl residues at C-3 position of steroidal saponins could be hydrolyzed to corresponding secondary steroidal saponins, among which 18 compounds were isolated and identified, including 3 new secondary compounds. For the furostanosides having glucosyl residues at the C-26 position, hydrolysis occurred first at end- rhamnosyl at C-3 position to produce secondary furostanosides. The reaction of hydrolyzing glucosyl at C-26 position depended considerably on longer reaction times yielding the corresponding secondary spirostanosides ( without rhamnosyl and glucosyl residues). The enzyme had the strict specificity for the terminal alpha-1,2-linked rhamnosyl residues of linear chain, or the terminal alpha-1,2-linked rhamnosyl residues with branched chain of 1,4-linked glycosyl residues of sugar chain at C-3 position of steroidal saponins, it was not specific for different aglycones, different glycons, and the number of glycon of sugar chain of steroidal saponin. The end- rhamnosyl of ginsenosides and p-nitrophenyl-a-L-rhamnopyranoside (pNPR) could not be hydrolyzed by the enzyme from C. lunata. (c) 2007 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2007.04.076

文献信息

• Microbial transformation of pseudoprotodioscin by <i>Gibberella fujikuroi</i>
  作者：Hong-Xiu Hu、Ran-Ran Gao、Zhao-Hui Gao、Yue Qiao、Xin-Ran Dong、Gang Ding、Di-An Sun

  DOI：10.1080/10286020.2018.1468438

  日期：2018.7.3

  obtained from the fermentation broth of pseudoprotodioscin (PPD) incubated with a fungus Gibberella fujikuroi CGMCC 3.4663. Structures of the metabolites were elucidated by 1-D (1H, 13C), 2-D (HMBC, HSQC, NOESY) NMR, and HR-MS analyses. The biotransformation pathway of pseudoprotodioscin by Gibberella fujikuroi CGMCC 3.4663 was proposed. Compounds 1–11 were tested in vitro for their cytotoxic activities

  三个新的（6,9，和12从与真菌孵育pseudoprotodioscin（PPD）的发酵液得到）和9个已知的甾体皂苷赤霉恶苗CGMCC 3.4663。通过1-D（1 H，13 C），2-D（HMBC，HSQC，NOESY）NMR和HR-MS分析阐明了代谢物的结构。提出了藤原赤霉菌CGMCC 3.4663对拟原生物素的生物转化途径。体外测试了化合物1-11对两种人类癌细胞系（HepG2和Hela）的细胞毒活性。化合物1，6，9，和10表现出针对HepG2细胞的细胞毒活性。化合物10显示出对Hela细胞的细胞毒性。