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转运体网络可作为营养传感器为植物细胞服务,并模拟类转ceptor行为。

Transporter networks can serve plant cells as nutrient sensors and mimic transceptor-like behavior.

作者信息

Dreyer Ingo, Li Kunkun, Riedelsberger Janin, Hedrich Rainer, Konrad Kai R, Michard Erwan

机构信息

Centro de Bioinformática, Simulación y Modelado (CBSM), Facultad de Ingeniería, Universidad de Talca, Campus Talca, Avenida Lircay, Talca 3460000, Chile.

Department of Botany I, Julius-Von-Sachs Institute for Biosciences, University of Wuerzburg, Julius-von-Sachs-Platz 2, 97082 Wuerzburg, Germany.

出版信息

iScience. 2022 Mar 15;25(4):104078. doi: 10.1016/j.isci.2022.104078. eCollection 2022 Apr 15.

Abstract

Sensing of external mineral nutrient concentrations is essential for plants to colonize environments with a large spectrum of nutrient availability. Here, we analyzed transporter networks in computational cell biology simulations to understand better the initial steps of this sensing process. The networks analyzed were capable of translating the information of changing external nutrient concentrations into cytosolic H and Ca signals, two of the most ubiquitous cellular second messengers. The concept emerging from the computational simulations was confirmed in wet-lab experiments. We document in guard cells that alterations in the external KCl concentration were translated into cytosolic H and Ca transients as predicted. We show that transporter networks do not only serve their primary task of transport, but can also take on the role of a receptor without requiring conformational changes of a transporter protein. Such transceptor-like phenomena may be quite common in plants.

摘要

感知外部矿质养分浓度对于植物在养分可利用性范围广泛的环境中定殖至关重要。在此,我们在计算细胞生物学模拟中分析了转运体网络,以更好地理解这一感知过程的初始步骤。所分析的网络能够将外部养分浓度变化的信息转化为胞质H和Ca信号,这是两种最普遍存在的细胞第二信使。计算模拟中出现的概念在湿实验室实验中得到了证实。我们在保卫细胞中记录到,外部KCl浓度的变化如预测的那样转化为胞质H和Ca瞬变。我们表明,转运体网络不仅履行其运输的主要任务,还可以在不需要转运蛋白构象变化的情况下承担受体的角色。这种类似转ceptor的现象在植物中可能相当普遍。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/902d/8976136/e3d41317a065/fx1.jpg

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