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Structural insight into brassinosteroid perception by BRI1

Open access
She, Ji, Han, Zhifu, Kim, Tae-Wuk, Wang, Jinjing, Cheng, Wei, Chang, Junbiao, Shi, Shuai, Wang, Jiawei, Yang, Maojun, Wang, Zhi-Yong, Chai, Jijie·2011·Nature

Abstract

Brassinosteroids are essential phytohormones that have crucial roles in plant growth and development. Perception of brassinosteroids requires an active complex of BRASSINOSTEROID-INSENSITIVE 1 (BRI1) and BRI1-ASSOCIATED KINASE 1 (BAK1). Recognized by the extracellular leucine-rich repeat (LRR) domain of BRI1, brassinosteroids induce a phosphorylation-mediated cascade to regulate gene expression. Here we present the crystal structures of BRI1(LRR) in free and brassinolide-bound forms. BRI1(LRR) exists as a monomer in crystals and solution independent of brassinolide. It comprises a helical solenoid structure that accommodates a separate insertion domain at its concave surface. Sandwiched between them, brassinolide binds to a hydrophobicity-dominating surface groove on BRI1(LRR). Brassinolide recognition by BRI1(LRR) is through an induced-fit mechanism involving stabilization of two interdomain loops that creates a pronounced non-polar surface groove for the hormone binding. Together, our results define the molecular mechanisms by which BRI1 recognizes brassinosteroids and provide insight into brassinosteroid-induced BRI1 activation.

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Metadata

Authors
She, J., Han, Z., Kim, T.-W., Wang, J., Cheng, W., Chang, J., Shi, S., Wang, J., Yang, M., Wang, Z.-Y., & Chai, J.
Venue
Nature
Published
2011-06
Volume
474
Issue
7352
Pages
472-476
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W2012847956
Cited by
418
References
8
FWCI
42.50
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Structural insight into brassinosteroid perception by BRI1. https://app.cochat.ai/papers/10.1038/nature10178
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She, J., Han, Z., Kim, T.-W., Wang, J., Cheng, W., Chang, J., Shi, S., Wang, J., Yang, M., Wang, Z.-Y., & Chai, J. (2011). Structural insight into brassinosteroid perception by BRI1. Nature. https://doi.org/10.1038/nature10178

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