IUBMB Enzyme Nomenclature


Accepted name: protodioscin 26-O-β-D-glucosidase

Reaction: protodioscin + H2O = 26-deglucoprotodioscin + D-glucose

For diagram of reaction click here.

Other name(s): F26G; torvosidase; CSF26G1; furostanol glycoside 26-O-β-D-glucosidase; furostanol 26-O-β-D-glucoside glucohydrolase

Systematic name: protodioscin glucohydrolase

Comments: The enzyme has been characterized from the plants Cheilocostus speciosus and Solanum torvum. It also hydrolyses the 26-β-D-glucose group from related steroid glucosides such as protogracillin, torvoside A and torvoside H.

Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, CAS registry number:


1. Inoue, K. and Ebizuka, Y. Purification and characterization of furostanol glycoside 26-O-β-glucosidase from Costus speciosus rhizomes. FEBS Lett 378 (1996) 157-160. [PMID: 8549824]

2. Arthan, D., Kittakoop, P., Esen, A. and Svasti, J. Furostanol glycoside 26-O-β-glucosidase from the leaves of Solanum torvum. Phytochemistry 67 (2006) 27-33. [PMID: 16289258]

[EC created 2013]

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