首页> 外文期刊>Fungal Biology Reviews >Plant defensins: common fold, multiple functions. (Special Issue: Revealing diverse modes of action and biological roles of antifungal peptides.)
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Plant defensins: common fold, multiple functions. (Special Issue: Revealing diverse modes of action and biological roles of antifungal peptides.)

机译:植物防御素:常见的褶皱,具有多种功能。 (特刊:揭示抗真菌肽的多种作用方式和生物学作用。)

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摘要

Plant defensins represent a large class of structurally similar peptides found throughout the plant kingdom. Despite a conserved cysteine spacing pattern and three-dimensional structure, their sequences are highly divergent and they display a range of activities including antifungal and antibacterial activities, enzyme inhibitory activities as well as roles in heavy metal tolerance and development. The vast number of sequences along with their diverse range of activities makes it impossible to test the activity and assign function to all plant defensins. However, as the number of characterized defensins increases, in depth sequence analysis may allow us to predict the function of newly identified peptides. In this review, we analyze the sequences of defensins whose activities have been described and group these based on similarity using a maximum-likelihood phylogenetic tree. We also compare the amino acids that have been described as essential for the activity of various plant defensins between these groups. While many more plant defensins will need to be characterized before we can develop rules to predict the activity of novel sequences, this approach may prove useful in identifying structure-function relationships.
机译:植物防御素代表遍及整个植物界的一大类结构相似的肽。尽管半胱氨酸间隔模式和三维结构是保守的,它们的序列还是高度差异的,它们显示出一系列活性,包括抗真菌和抗菌活性,酶抑制活性以及在重金属耐受性和发育中的作用。大量的序列及其各种各样的活性使得不可能测试活性并将功能赋予所有植物防御素。但是,随着特征防御素数量的增加,深度序列分析可能使我们能够预测新鉴定的肽的功能。在这篇综述中,我们分析了防御素的序列,这些防御素的活性已得到描述,并使用最大似然系统树根据相似性将它们分组。我们还比较了已描述为这些组之间各种植物防御素活性必需的氨基酸。尽管在我们能够制定规则预测新序列的活性之前,还需要对许多植物防御素进行表征,但是这种方法可能对确定结构与功能的关系很有用。

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