Cyanogens, cyclopentenoid

Figure 1. 6-Glucosidase-mediated hydrolysis of cyclopentenoid cyanogenic glycosides.

Spencer, K.C. and Seigler, D.S. (1985) Passibiflorin, epipassibiflorin and passitrifasci-atin cyclopentenoid cyanogenic glucosides from Passflora. Phytochemistry, 24,981-6. 

Cyanogenic Glucosides with a Cyclopentenoid Ring Structure... 

A group of cyanogens that contain a cyclopentenoid ring structure (or related structure) are derived from (2-cyclopen-tenyOglycine, a nonprotein amino acid (Fig. 16.13) (Cramer... 

In most plants, cyanogenic glycosides are accompanied by a corresponding (3-glycosidase. One such enzyme system, emulsin, from almond seeds, has fairly broad specificity and has been widely studied. Most of these enzymes, however, have more specific substrate requirements. The specificity of enzymes from plants containing cyclopentenoid cyanogenic glycosides has been reviewed (Spencer, 1987). 

In some instances, when an unnatural enzyme is added to a substrate and the natural enzyme then added, no reaction is observed. The nature of these effects is dependent on concentrations of enzymes and substrates as well as the order of addition. Interactions of this type for cyclopentenoid cyanogenic glycosides and the corresponding enzyme system have been reviewed (Spencer, 1987). 

Spencer, K. C. and D. S. Seigler, Passibiflorin, epipassibiflorin, and passitrifasciatin Cyclopentenoid cyanogenic glycosides from Passiflora, Phytochemistry, 24, 981-986 (1985d). 

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