RinRK1 enhances NF receptors accumulation in nanodomain-like structures at root-hair tip

Ning Zhou, Xiaolin Li, Zhiqiong Zheng, Jing Liu, J. Allan Downie and Fang Xie ()
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Ning Zhou: Chinese Academy of Sciences
Xiaolin Li: Chinese Academy of Sciences
Zhiqiong Zheng: Chinese Academy of Sciences
Jing Liu: Chinese Academy of Sciences
J. Allan Downie: Norwich Research Park
Fang Xie: Chinese Academy of Sciences

Nature Communications, 2024, vol. 15, issue 1, 1-16

Abstract: Abstract Legume-rhizobia root-nodule symbioses involve the recognition of rhizobial Nod factor (NF) signals by NF receptors, triggering both nodule organogenesis and rhizobial infection. RinRK1 is induced by NF signaling and is essential for infection thread (IT) formation in Lotus japonicus. However, the precise mechanism underlying this process remains unknown. Here, we show that RinRK1 interacts with the extracellular domains of NF receptors (NFR1 and NFR5) to promote their accumulation at root hair tips in response to rhizobia or NFs. Furthermore, Flotillin 1 (Flot1), a nanodomain-organizing protein, associates with the kinase domains of NFR1, NFR5 and RinRK1. RinRK1 promotes the interactions between Flot1 and NF receptors and both RinRK1 and Flot1 are necessary for the accumulation of NF receptors at root hair tips upon NF stimulation. Our study shows that RinRK1 and Flot1 play a crucial role in NF receptor complex assembly within localized plasma membrane signaling centers to promote symbiotic infection.

Date: 2024
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DOI: 10.1038/s41467-024-47794-4

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