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Subcellular Trafficking of BRI1 Receptors and Its Role in Brassinosteroids Signal Transduction
Liu Qinsong1*, Wang Guifeng2
1Key Laboratory of Ministry of Education for Southwest China Wildlife Resources Conservation, Institute of Plant Germplasm Adaptation and Utilization in Southwest Mountain, College of Life Science, China West Normal University, Nanchong 637009, China; 2Shanghai Key Laboratory of Bio-Energy Crops, School of Life Sciences, Shanghai University, Shanghai 200444, China
Abstract: Brassinosteroids (BRs) are a class of important phytohormones that control many processes during plant development and also responsible to stress. Thus， studies in BRs signal transduction are one of the hotspots in the field of plant biology. The BRI1 (brassinosteroid insensitive 1) receptor perceives BRs signal to initiate signal transduction， which is subsequently propagated through a number of downstream components， resulting in transcriptional changes of BRs-responsive genes. From the perspective of cell biology， the aim of this
review is to summarize recent advances on the following aspects: (1) newly synthesized BRI1 receptors trafficking to the plasma membrane after being monitored by endoplasmic reticulum quality control; (2) endocytosis and vacuolar trafficking of BRI1; (3) the co-receptor BAK1 (BRI1-associated kinase 1)-mediated regulation of BRI1 trafficking; (4) termination of BR signaling， and highlight the open questions and potential research directions.
review is to summarize recent advances on the following aspects: (1) newly synthesized BRI1 receptors trafficking to the plasma membrane after being monitored by endoplasmic reticulum quality control; (2) endocytosis and vacuolar trafficking of BRI1; (3) the co-receptor BAK1 (BRI1-associated kinase 1)-mediated regulation of BRI1 trafficking; (4) termination of BR signaling， and highlight the open questions and potential research directions.
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