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BRASSINOSTEROID INSENSITIVE2 negatively regulates cellulose synthesis in Arabidopsis by phosphorylating cellulose synthase 1
Author
Sanchez-Rodriguez, ClaraKetelaar, KassaDee J.
Schneider, Rene
Villalobos, Jose A.
Somerville, Chris R.
Persson, Staffan
Wallace, Ian S.
Date
2017Type
ArticleAbstract
The deposition of cellulose is a defining aspect of plant growth and development, but regulation of this process is poorly understood. Here, we demonstrate that the protein kinase BRASSINOSTEROID INSENSITIVE2 (BIN2), a key negative regulator of brassinosteroid (BR) signaling, can phosphorylate Arabidopsis cellulose synthase A1 (CESA1), a subunit of the primary cell wall cellulose synthase complex, and thereby negatively regulate cellulose biosynthesis. Accordingly, point mutations of the BIN2-mediated CESA1 phosphorylation site abolished BIN2-dependent regulation of cellulose synthase activity. Hence, we have uncovered a mechanism for how BR signaling can modulate cellulose synthesis in plants.
Permanent link
http://hdl.handle.net/11714/5122Additional Information
Journal Title | Proceedings of the National Academy of Sciences |
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Rights | In Copyright (All Rights Reserved) |
Rights Holder | Authors |