Annalisa John, Moritz Krämer, Martin Lehmann, Hans-Henning Kunz, Fayezeh Aarabi, Saleh Alseekh, Alisdair Fernie, Frederik Sommer, Michael Schroda, David Zimmer, Timo Mühlhaus, Helga Peisker, Katharina Gutbrod, Peter Dörmann, Jens Neunzig, Katrin Philippar, H Ekkehard Neuhaus
Plants need to acclimate to different stresses to optimize growth under unfavorable conditions. In Arabidopsis (Arabidopsis thaliana), the abundance of the chloroplast envelope protein FATTY ACID EXPORT PROTEIN1 (FAX1) decreases after the onset of low temperatures. However, how FAX1 degradation occurs and whether altered FAX1 abundance contributes to cold tolerance in plants remains unclear. The rapid cold-induced increase in RHOMBOID-LIKE PROTEASE11 (RBL11) transcript levels, the physical interaction of RBL11 with FAX1, the specific FAX1 degradation after RBL11 expression, and the absence of cold-induced FAX1 degradation in rbl11 loss-of-function mutants suggest that this enzyme is responsible for FAX1 degradation...
January 18, 2024: Plant Cell