拟南芥无机氮素转运蛋白及其磷酸化调控研究进展

Progress in Inorganic Nitrogen Transport Proteins and Their Phosphorylation Regulatory Mechanism in Arabidopsis

氮元素是植物必需的营养元素之一,氮素供需失衡会严重影响植物的生长发育。无机氮(硝酸根NO3–和铵根NH4+)是植物体内氮素的主要来源,对其有效吸收和利用依赖于多种类型转运蛋白的协同作用。其中,部分无机氮素转运蛋白的活性受到可逆磷酸化作用的精准调控。该文将对模式植物拟南芥(Arabidopsis thaliana)中硝酸根和铵根转运蛋白的分类、结构、定位和功能特点等进行总结,并重点对可逆磷酸化调控转运蛋白的分子机制加以阐述。

Nitrogen（N） is an essential nutrient element. Its supply and demand imbalance would seriously affect plant growth and development. Inorganic N（nitrate and ammonium radical） is the major N source in plant, with assimilation and transportation depending on synergistic action of various transport proteins. The activity of some inorganic N transporters is regulated at the post-translation level by phosphorylation. This review describes a global picture of the inorganic N transporters including their classification, molecular structure, location and biological function in Arabidopsis. The phosphorylation regulatory mechanisms of some inorganic N transporters are mainly discussed.