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Elicitin
In molecular biology, elicitins are a family of small, highly conserved proteins secreted by phytopathogenic microorganisms belonging to the ''Phytophthora'' and ''Pythium'' species. They are toxic proteins responsible for inducing a necrotic and systemic hypersensitive response in plants from the Solanaceae and Cruciferae families. Leaf necrosis provides immediate control of fungal invasion and induces systemic acquired resistance; both responses mediate basic protection against subsequent pathogen inoculation. Members of this family share a high level of sequence similarity, but they differ in net charge, dividing them into two classes: alpha and beta.〔 Alpha-elicitins are highly acidic, with a valine residue at position 13, whereas beta-elicitins are basic, with a lysine at the same position. Residue 13 is known to be involved in the control of necrosis and, being exposed, is thought to be involved in ligand/receptor binding. Phenotypically, the two classes can be distinguished by their necrotic properties: beta-elicitins are 100-fold more toxic and provide better subsequent protection.〔 ==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Elicitin」の詳細全文を読む
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