beta-Glucosidases as detonators of plant chemical defense |
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| Authors: | Morant Anne Vinther Jørgensen Kirsten Jørgensen Charlotte Paquette Suzanne Michelle Sánchez-Pérez Raquel Møller Birger Lindberg Bak Søren |
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| Affiliation: | Plant Biochemistry Laboratory, Department of Plant Biology and The VKR Research Centre Proactive Plants, University of Copenhagen, 40 Thorvaldsensvej, DK-1871 Frederiksberg C, Copenhagen, Denmark. |
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| Abstract: | Some plant secondary metabolites are classified as phytoanticipins. When plant tissue in which they are present is disrupted, the phytoanticipins are bio-activated by the action of beta-glucosidases. These binary systems--two sets of components that when separated are relatively inert--provide plants with an immediate chemical defense against protruding herbivores and pathogens. This review provides an update on our knowledge of the beta-glucosidases involved in activation of the four major classes of phytoanticipins: cyanogenic glucosides, benzoxazinoid glucosides, avenacosides and glucosinolates. New aspects of the role of specific proteins that either control oligomerization of the beta-glucosidases or modulate their product specificity are discussed in an evolutionary perspective. |
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| Keywords: | BGAF, β-glucosidase aggregating factor DIBOA, 2,4-dihydroxy-1,4-benzoxazin-3-one DIMBOA, 2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one ESM, epithiospecifier modifying protein ESP, epithiospecifier protein BxGlc, benzoxazinoid glucoside MBP, myrosinase binding protein MyAP, myrosinase associated protein TFP, thiocyanate-forming protein |
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