植物磷脂酶C的功能研究进展

The research progress on the functions of plant phospholipase C

磷脂酶C(phospholipase C,PLC)是一类重要的水解酶,根据作用底物的不同可主要区分为磷脂酰肌醇特异性磷脂酶C(phosphoinositide-specific PLC,PI-PLC)和非特异性磷脂酶C(non-specific PLC,NPC)。在植物细胞的信号转导中,PLC及其产物均发挥重要的媒介作用。不同于动物细胞,植物细胞中的六磷酸肌醇(inositol hexaphosphate,IP_6)和磷脂酸(phosphatidic acid,PA)被认为是传递植物磷脂信号的主要成员。现概述磷脂酶C的结构、家族成员的分类以及它们在细胞信号转导过程中发挥的作用,并对相关领域今后的研究方向提出展望。

Phospholipase C（PLC） is a class of important hydrolytic enzymes. Based on the specificity of substrates, PLC is mainly categorized into two groups： PI-PLC（phosphoinositide-specific PLC） and NPC（non-specific PLC）. The important roles of PLCs and their products in mediating signal transduction in plant cells are indispensable. Other than in animal cells, both IP_6（inositol hexaphosphate） and PA（phosphatidic acid） are considered as the key components of the phospholipid-based signaling in plants. In this article, we summarize the structures of PLC proteins and the classification of PLC family members. We also highlight the functions of plant PLCs and discuss the prospect underlying the molecular mechanisms involved in plant development.