Discovery of nitrate-CPK-NLP signalling in central nutrient-growth networks.

Discovery of nitrate-CPK-NLP signalling in central nutrient-growth networks.
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DOI:
10.1038/nature22077
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发表时间:
2017-05-18
期刊:
影响因子:
64.8
通讯作者:
Sheen J
Sheen J
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Liu KH;Niu Y;Konishi M;Wu Y;Du H;Sun Chung H;Li L;Boudsocq M;McCormack M;Maekawa S;Ishida T;Zhang C;Shokat K;Yanagisawa S;Sheen J

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Nutrient signalling integrates and coordinates gene expression, metabolism and growth. However, its primary molecular mechanisms remain incompletely understood in plants and animals. Here we report novel Ca2+ signalling triggered by nitrate with live imaging of an ultrasensitive biosensor in Arabidopsis leaves and roots. A nitrate-sensitized and targeted functional genomic screen identifies subgroup III Ca2+-sensor protein kinases (CPKs) as master regulators orchestrating primary nitrate responses. A chemical switch with the engineered CPK10(M141G) kinase enables conditional analyses of cpk10,30,32 to define comprehensive nitrate-associated regulatory and developmental programs, circumventing embryo lethality. Nitrate-CPK signalling phosphorylates conserved NIN-LIKE PROTEIN (NLP) transcription factors (TFs) to specify reprogramming of gene sets for downstream TFs, transporters, N-assimilation, C/N-metabolism, redox, signalling, hormones, and proliferation. Conditional cpk10,30,32 and nlp7 similarly impair nitrate-stimulated system-wide shoot growth and root establishment. The nutrient-coupled Ca2+ signalling network integrates transcriptome and cellular metabolism with shoot-root coordination and developmental plasticity in shaping organ biomass and architecture.
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