The present invention relates to a method for mass production of ginsenoside Rh
2
-Mix. The present invention includes treating PPD-Mix with an organic acid and heat to obtain Rg
3
-Mix and treating the obtained Rg
3
-Mix using a recombinant GRAS strain in the Rg
3
-Mix to produce Rh
2
-Mix, and thereby facilitates the mass production of ginsenoside Rh
2
-Mix using β-glucosidase, which has been known to be difficult. Further, the present invention is advantageous in that the Rh
2
-Mix can be produced in high yield even at high temperatures, and mass production thereof for industrial purposes is practical as the production process is simple and more economical than direct use of an enzyme.
METHOD OF TREATING AGE-RELATED MACULAR DEGENERATION
申请人:ZHUHAI QiWEl BIO-TECHNOLOGY LTD.
公开号:US20220016146A1
公开(公告)日:2022-01-20
Provided herein are compounds/compositions that are useful for killing or inhibiting the growth of a microorganism, such as
Bacillus megaterium
. Also provided herein are methods of using the compounds/compositions for treating infections with a microorganism, such as
Bacillus megaterium
and for treating or preventing diseases or disorders associated with such infections, such as AMD.
GROUP OF GLYCOSYLTRANSFERASES AND USE THEREOF
申请人:Shanghai Institutes For Biological Sciences, Chinese Academy Of Sciences
公开号:US20160115515A1
公开(公告)日:2016-04-28
Provided are the use of glycosyltransferases gGT25, gGT13, gGT30, gGT25-1, gGT25-3, gGT25-5, gGT29, gGT29-3, gGT29-4, gGT29-5, gGT29-6, gGT29-7, 3GT1, 3GT2, 3GT3, 3GT4 and derived polypeptides therefrom in the catalyzed glycosylation of terpenoid compounds and the synthesis of new saponins, wherein the glycosyltransferases can specifically and efficiently catalyze tetracyclic triterpenoid compound substrates at positions C-20 and/or C-6 and/or C-3 during hydroxyl glycosylation, and/or transfer the glycosyl from a glycosyl donor to the first glycosyl of the tetracyclic triterpenoid compounds at position C-3, so as to extend the sugar chain. The glycosyltransferases can also be used for constructing man-made synthetic rare ginsenosides and a variety of new ginsenosides and derivatives thereof.
Biocatalytic Generation of Molecular Diversity: Modification of Ginsenoside Rb1 by β-1,4-Galactosyltransferase and Candida antarctica Lipase, Part 4 For Part 3, see [1].
enzymes showed the expected regioselectivity towards specific glucose OH groups (i.e., OHC(4) for GalT and preferentially the primary OHC(6) for Novozym ®435), accompanied by a nonpredictable ‘site selectivity' for the gentiobiose disaccharide unit linked at C(20) of the dammarane skeleton. The galactosylated products 1a–e and the acetylated products 1f–h were isolated by HPLC and fully characterized by