综合性分子系统方法揭示了植物酸盐输送器NRT1.1的双相酸盐吸收背后的机制
Seemadri Subhadarshini1, Sarthak Sahoo2, Mohit Kumar Jolly2
1Department of Bioengineering, Indian Institute of Science, Bangalore, India. seemadris@iisc.ac.in.
NPJ systems biology and applications
|October 13, 2025
概括
植物酸盐输送器NRT1.1通过酸化切换亲和力. 这项研究揭示了蛋白质灵活性和监管网络如何控制酸盐的吸收,这对于有效的作物营养使用至关重要.
科学领域:
- 植物生物学 植物生物学
- 分子机制的分子机制
- 营养物质运输 营养物质运输
背景情况:
- 在作物中有效吸收营养对农业至关重要.
- 植物酸盐运输器NRT1.1展示了可适应的高和低亲和力运输方式.
- NRT1.1 功能切换是依赖酸化的,但人们对其了解甚少.
研究的目的:
- 为了阐明NRT1.1双相运输行为背后的分子机制.
- 了解酸化和酸盐结合如何调节NRT1.1的构造和运输动力学.
- 将NRT1.1调节集成到一个更广泛的酶信号网络中.
主要方法:
- 综合分子和系统级建模.
- 对NRT1.1酸化和酸盐结合对蛋白质构成的影响的分析.
- 研究CIPK8/CIPK23激酶和CBL1/9结合蛋白的调节作用.
主要成果:
- NRT1.1酸化和酸盐结合协同改变蛋白质的灵活性和总体形状,影响运输速率.
- 一个涉及CIPK8,CIPK23,CBL1和CBL9的监管网络控制NRT1.1酸化.
- 高酸盐条件触发了CIPK8-介导的CIPK23-CBL复合物的干扰,将NRT1.1切换到低亲和力传输.
结论:
- 这项研究揭示了NRT1.1酸化开关的分子复杂性.
- 这些发现提供了关于植物酸盐感应和适应营养物质可用性波动的见解.
- 了解这些机制可以帮助开发高营养效率的作物.
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