Cell-Death Control by Receptor Kinases in Arabidopsis thaliana
Arabidopsis contains at least 223 leucine-rich repeat receptor-like protein kinases (LRR-RLKs). The somatic embryogenesis receptor kinases (SERKs) form a small subfamily of the LRR-RLK family. The BRI1-associated receptor kinase (BAK1 or SERK3) was identified as a co-receptor of the brassinosteroid (BR) receptor BRI1. Loss-of-function genetic analysis indicates that BAK1 and its closest paralog BKK1 are independently involved in BRI1-mediated BR signaling and cell-death control signaling pathways. More recently, BAK1 has been identified as a co-receptor interacting with a number of distinct ligand-binding RLKs to regulate multiple signaling pathways. This chapter will mainly discuss how BAK1 and BKK1 were identified as key regulators in controlling cell death, and the possible mechanisms involved in this process.
KeywordsSomatic Embryogenesis Receptor Kinase Cytoplasmic Kinase Domain Double Null Mutant Double Mutant Background Double Mutant Seedling
The authors’ research group is currently supported by National Basic Research Program of China Grant 2011CB915401 (to J.L.), National Natural Science Foundation of China Grants 90917019 (to J.L.) and 31070283 (to X.G.).
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