Hevea Linamarase-A Nonspecific beta-Glycosidase |
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Authors: | Selmar D Lieberei R Biehl B Voigt J |
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Affiliation: | Botanisches Institut der Technischen Universität, Postfach 3329, D-3300 Braunschweig, Federal Republic of Germany;Institut für Allgemeine Botanik, D-2000 Hamburg 52, Federal Republic of Germany |
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Abstract: | In the leaf tissue of the cyanogenic plant Hevea brasiliensis, which contains large amounts of linamarin, there is no specific linamarase. In Hevea leaves only one β-glucosidase is detectable. It is responsible for the cleavage of all β-glucosides and β-galactosides occurring in Hevea leaf tissue, including the cyanogenic glucoside linamarin. Therefore, the enzyme is referred to as a β-glycosidase instead of the term β-glucosidase. This β-glycosidase has a broad substrate spectrum and occurs in multiple forms. These homo-oligomeric forms are interconvertible by dissociation-association processes. The monomer is a single protein of 64 kilodaltons. |
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