拟南芥无机氮素转运蛋白及其磷酸化调控研究进展

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。

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

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.