NDLI: On the Origin and Evolution of Plant Brassinosteroid Receptor Kinases

Content Provider	Springer Nature Link
Author	Wang, Hao Mao, Hongliang
Copyright Year	2013
Abstract	Brassinosteroid (BR) signaling pathway is so far the best-understood receptor-kinase signaling pathway in plants. In Arabidopsis, the activation of this pathway requires binding of BRs to the receptor kinase BRASSINOSTEROID-INSENSITIVE I (AtBRI1). Although the function of AtBRI1 has been extensively studied, it is not known when the binding function emerged and how this important component of BR signaling pathway and related genes (the BRI1–BRL gene family) have evolved in plants. We define BRI1–BRL genes in sequenced plant genomes, construct profiles for critical protein domains, scan them against all accessible plant gene/EST resources, and reveal the evolution of domain configuration of this family. We also investigate its evolutionary pattern through phylogenetic analysis. The complete BR receptor domain configuration originates through two domain gain events in the ancestral receptor-like kinase: first juxtamembrane domain gained during the early diversification of land plants, and then island domain (ID) acquired in the common ancestor of angiosperms and gymnosperms after its divergence from spike moss. The 70 amino acid ID has characteristic sequences of BRI1–BRL family and this family keeps relative stable copy numbers during the history of angiosperms and the majority of duplications and losses have occurred in terminal taxa in current taxon sampling. This study reveals important events shaping structural and functional characteristics of plant BR receptors. It answers the question of how and when BR receptors originates, which provide insights into the origin and evolution of the BR signaling pathway.
Starting Page	118
Ending Page	129
Page Count	12
File Format	PDF
ISSN	00222844
Journal	Journal of Molecular Evolution
Volume Number	78
Issue Number	2
e-ISSN	14321432
Language	English
Publisher	Springer US
Publisher Date	2013-12-27
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Brassinosteroid BRI1 Protein domain Gene family Evolution Evolutionary Biology Microbiology Plant Sciences Plant Genetics & Genomics Animal Genetics and Genomics Cell Biology
Content Type	Text
Resource Type	Article
Subject	Genetics Molecular Biology Ecology, Evolution, Behavior and Systematics

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