SnRK2在植物响应逆境胁迫和生长发育中的作用

The role of SnRK2 in the response to stress, the growth and development of plants

摘要:

蔗糖非发酵-1-相关蛋白激酶2 (sucrose non-fermenting-1-related protein kinase 2, SnRK2)是一类植物特有的Ser/Thr蛋白激酶，其主要通过磷酸化底物来调节下游基因的表达，实现不同组织部位的抗逆调控，使植物适应不利环境。该蛋白激酶家族成员数量较少，分子量约为40 kDa，含有保守的N端激酶结构域和差异明显的C端调节结构域，对酶的表达起到至关重要的作用。文中综述了SnRK2的发现、结构、分类及其响应各种逆境胁迫和调控生长发育的功能等方面的研究成果，并对未来的研究方向进行了展望，以期为农作物抗逆性遗传改良提供理论依据。

Abstract:

Sucrose non-fermenting-1-related protein kinase 2 (SnRK2) is a specific Ser/Thr protein kinase in plants. SnRK2 can regulate the expression of downstream genes or transcription factors through phosphorylation of substrates to achieve stress resistance regulation in different tissue parts, and make plants adapt to adverse environment. SnRK2 has a small number of members and a molecular weight of about 40 kDa, and contains a conserved N-terminal kinase domain and a divergent C-terminal regulatory domain, which plays an important role in the expression of enzyme. This review summarized the recent research progresses on the discovery, structure, and classification of SnRK2, and its function in response to various stresses and in regulating growth and development, followed by prospecting the future research direction of SnRK2. This review may provide a reference for genetic improvement of crop stress resistance.