橡胶树亚麻苦苷酶-A 非特异性β-糖苷酶
Hevea Linamarase-A Nonspecific beta-Glycosidase.
作者信息
Selmar D, Lieberei R, Biehl B, Voigt J
机构信息
Botanisches Institut der Technischen Universität, Postfach 3329, D-3300 Braunschweig, Federal Republic of Germany.
出版信息
Plant Physiol. 1987 Mar;83(3):557-63. doi: 10.1104/pp.83.3.557.
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 beta-glucosidase is detectable. It is responsible for the cleavage of all beta-glucosides and beta-galactosides occurring in Hevea leaf tissue, including the cyanogenic glucoside linamarin. Therefore, the enzyme is referred to as a beta-glycosidase instead of the term beta-glucosidase. This beta-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.
摘要
在含有大量亚麻苦苷的生氰植物巴西橡胶树的叶片组织中，不存在特定的亚麻苦苷酶。在巴西橡胶树的叶片中，仅可检测到一种β-葡萄糖苷酶。它负责裂解巴西橡胶树叶片组织中出现的所有β-葡萄糖苷和β-半乳糖苷，包括生氰糖苷亚麻苦苷。因此，该酶被称为β-糖苷酶而非β-葡萄糖苷酶。这种β-糖苷酶具有广泛的底物谱，并且以多种形式存在。这些同型寡聚体形式可通过解离-缔合过程相互转化。单体是一种64千道尔顿的单一蛋白质。
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