Identification of critical cysteine sites in brassinosteroid-insensitive 1 and novel signaling regulators using a transient expression system

Identification of critical cysteine sites in brassinosteroid-insensitive 1 and novel signaling regulators using a transient expression system

© 2019 The Authors. New Phytologist © 2019 New Phytologist Trust.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1979. - 222(2019), 3 vom: 14. Mai, Seite 1405-1419
1. Verfasser: Huang, Guozhong (VerfasserIn)
Weitere Verfasser: Sun, Jianhang, Bai, Jiaojiao, Han, Yufang, Fan, Fenggui, Wang, Shuangfeng, Zhang, Yingying, Zou, Yanmin, Han, Zhifu, Lu, Dongping
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2019
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Arabidopsis thaliana BR-insensitive 1 (BRI1) brassinosteroid (BR) bri1-EMS-Suppressor 1 (BES1) disulfide-forming cysteine residues pattern-triggered immunity compromised receptor-like cytoplasmic kinase (PCRK) 1/2 transient system Arabidopsis Proteins mehr... BES1 protein, Arabidopsis Brassinosteroids DNA-Binding Proteins Protein Kinases EC 2.7.- BRI1 protein, Arabidopsis EC 2.7.11.1 Cysteine K848JZ4886
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520 |a © 2019 The Authors. New Phytologist © 2019 New Phytologist Trust. 
520 |a The plant hormones brassinosteroids (BRs) modulate plant growth and development. Cysteine (Cys) residues located in the extracellular domain of a protein are of importance for protein structure by forming disulfide bonds. To date, the systematic study of the functional significance of Cys residues in BR-insensitive 1 (BRI1) is still lacking. We used brassinolide-induced exogenous bri1-EMS-Suppressor 1 (BES1) dephosphorylation in Arabidopsis thaliana protoplasts as a readout, took advantage of the dramatic decrease of BRI1 protein levels during protoplast isolation, and of the strong phosphorylation of BES1 by BR-insensitive 2 (BIN2) in protoplasts, and developed a protoplast transient system to identify critical Cys sites in BRI1. Using this system, we identified a set of critical Cys sites in BRI1, as substitution of these Cys residues with alanine residues greatly compromised the function of BRI1. Moreover, we identified two negative regulators of BR signaling, pattern-triggered immunity compromised RLCK1 (PCRK1) and PCRK2, that were previously known to positively regulate innate immunity signaling. This work not only provides insight into the functional importance of critical Cys residues in stabilizing the superhelical conformation of BRI1-leucine-rich-repeat, but also reveals that PCRK1/2 can inversely modulate BR and plant immune signaling pathways 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a Arabidopsis thaliana 
650 4 |a BR-insensitive 1 (BRI1) 
650 4 |a brassinosteroid (BR) 
650 4 |a bri1-EMS-Suppressor 1 (BES1) 
650 4 |a disulfide-forming cysteine residues 
650 4 |a pattern-triggered immunity compromised receptor-like cytoplasmic kinase (PCRK) 1/2 
650 4 |a transient system 
650 7 |a Arabidopsis Proteins  |2 NLM 
650 7 |a BES1 protein, Arabidopsis  |2 NLM 
650 7 |a Brassinosteroids  |2 NLM 
650 7 |a DNA-Binding Proteins  |2 NLM 
650 7 |a Protein Kinases  |2 NLM 
650 7 |a EC 2.7.-  |2 NLM 
650 7 |a BRI1 protein, Arabidopsis  |2 NLM 
650 7 |a EC 2.7.11.1  |2 NLM 
650 7 |a Cysteine  |2 NLM 
650 7 |a K848JZ4886  |2 NLM 
700 1 |a Sun, Jianhang  |e verfasserin  |4 aut 
700 1 |a Bai, Jiaojiao  |e verfasserin  |4 aut 
700 1 |a Han, Yufang  |e verfasserin  |4 aut 
700 1 |a Fan, Fenggui  |e verfasserin  |4 aut 
700 1 |a Wang, Shuangfeng  |e verfasserin  |4 aut 
700 1 |a Zhang, Yingying  |e verfasserin  |4 aut 
700 1 |a Zou, Yanmin  |e verfasserin  |4 aut 
700 1 |a Han, Zhifu  |e verfasserin  |4 aut 
700 1 |a Lu, Dongping  |e verfasserin  |4 aut 
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773 1 8 |g volume:222  |g year:2019  |g number:3  |g day:14  |g month:05  |g pages:1405-1419 
856 4 0 |u http://dx.doi.org/10.1111/nph.15709  |3 Volltext 
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