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A prion-like domain is required for phase separation and chloroplast RNA processing during cold acclimation in Arabidopsis.
Plant Cell:koae145 (2024)
Arabidopsis (Arabidopsis thaliana) plants can produce photosynthetic tissue with active chloroplasts at temperatures as low as 4°C, and this process depends on the presence of the nuclear-encoded, chloroplast-localized RNA-binding protein CP29A. In this study, we demonstrate that CP29A undergoes phase separation in vitro and in vivo in a temperature-dependent manner, which is mediated by a prion-like domain (PLD) located between the two RNA recognition motif (RRM) domains of CP29A. The resulting droplets display liquid-like properties and are found near chloroplast nucleoids. The PLD is required to support chloroplast RNA splicing and translation in cold-treated tissue. Together, our findings suggest that plant chloroplast gene expression is compartmentalized by inducible condensation of CP29A at low temperatures, a mechanism that could play a crucial role in plant cold resistance.
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Publication type
Article: Journal article
Document type
Scientific Article
ISSN (print) / ISBN
1040-4651
e-ISSN
1532-298X
Journal
The Plant cell
Quellenangaben
Article Number: koae145
Publisher
American Society of Plant Biologists (ASPB)
Non-patent literature
Publications
Reviewing status
Peer reviewed
Institute(s)
Institute of Structural Biology (STB)