根瘤
共生
钙
生物
生物物理学
内共生
细胞生物学
钙调蛋白
钙信号传导
信号转导
化学
生物化学
细菌
遗传学
酶
基因
质体
有机化学
叶绿体
作者
Pablo del Cerro,Nicola Cook,Rik Huisman,Pierre Dangeville,Lauren E. Grubb,Clémence Marchal,Anson Ho Ching Lam,Myriam Charpentier
标识
DOI:10.1073/pnas.2200099119
摘要
Significance Oscillations in intracellular calcium concentration play an essential role in the regulation of multiple cellular processes. In plants capable of root endosymbiosis with nitrogen-fixing bacteria and/or arbuscular mycorrhizal fungi, nuclear localized calcium oscillations are essential to transduce the microbial signal. Although the ion channels required to generate the nuclear localized calcium oscillations have been identified, their mechanisms of regulation are unknown. Here, we combined proteomics and engineering approaches to demonstrate that the calcium-bound form of the calmodulin 2 (CaM2) associates with CYCLIC NUCLEOTIDE GATED CHANNEL 15 (CNGC15s), closing the channels and providing the negative feedback to sustain the oscillatory mechanism. We further unraveled that the engineered CaM2 accelerates early endosymbioses and enhanced root nodule symbiosis but not arbuscular mycorrhization.
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