By Chong-Ren Yang, Osamu Tanaka
Hardbound. within the plant state quite a few chemical components happen in a glycoside shape (conjugation with sugar). Glycosides are vital, secondary metabolites. The structural range is as a result of the sizeable volume of types and stereochemical configurations of the sugar part. Aglycones belong to terpenoid, steroid, flavonoid, quinonoid, lignan, different easy phenolics, and isothiocyanate. besides the fact that, organic actions of glycosides are, in lots of instances, liable to the character of sugar moieties, even if their aglycone is the same.Since the 80s, plant glycosides were attracting an expanding quantity of curiosity from botanists and phytochemists world-wide for the subsequent purposes: - they're tricky to isolate and purify- they've got a crucial organic functionality in flora and noteworthy organic actions- they seem to be a extremely important source of usual drugs, wellbeing and fitness meals, cosmetics and f
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Extra info for Advances in Plant Glycosides, Chemistry and Biology, Proceedings of the International Symposium in Plant Glycosides
Costus speciosus (Zingiberaceae) grows wild in Southeast and South Asia. From the rhizomes, a number of spirostanol-3-O-monodesmosides of diosgenin and the corresponding furostanol-3,26-O-bisdemosides have been isolated as shown in Fig. 5 [ 10]. From rhizomes of this plant, Ebizuka and the coworkers, Tokyo University, succeeded to isolate an enzyme with this activity named furostanol-glycoside 26-O-13-glucosidase (F26G) [11-13 ]. The purified F26G is highly specific for the cleavage of the 26-O-13-glucosyl linkage of furostanol-glycosides; by this enzyme, protogracilin and protodioscin afforded gacillin and dioscin, respectively, while no hydrolysis were observed for cellobiose, gentiobiose, amygdalin, prunacin and octyl, phenyl and p-nitropheny113-D-glucosides.
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Yucca extract is recognized as safe for human food use by FDA. The extract tasteless and odorless, showing no effect on the taste of foods. The extract is now commercially utilized for extending the shelflife of cooked foods such as "sushi" and "musubi" and fermented seasonings such as soy sauce in Japan. Furostanol-glycoside 26-O-b-glucosidase (F26G) from Costus speciosus rhizomes: As mentioned above, spirostanol-3-O-mondesmosides from Mohave yucca exhibited potent antiyeast activity, while co-occurring furostanol-3, 26-O-bisdesmosides showed no activity.