Anil Grover

Friday Seminar by Ms. Nikita Sharma


PK Lab/ January3, 2020/ friday/ 3.30 pm/ Brassinosteroid insensitive 1(BR 1): Sensitive for plant growth and development.
Category: Research
Posted by: bedineel

 

BRASSINOSTEROID INSENSITIVE 1 (BRI 1): SENSITIVE FOR PLANT GROWTH AND DEVELOPMENT

 

 

Brassinosteroids are recognized by a membrane-localized Leu-rich repeat receptor-like kinase, BRASSINOSTEROID INSENSITIVE 1 (BRI1), and its coreceptor BRI1-ASSOCIATED RECEPTOR KINASE1 (BAK1). BRI 1 is a receptor with a dual specificity kinase activity acting on both serine/threonine- and tyrosine-containing substrates. BRI1 transduces BR signal by phosphorylating members of the BR-signaling kinase (BSK) family of RLCKs. A coordination of sugar availability with phytohormone signals is crucial for plant growth and development. The molecular link between sugar availability and hormone-dependent plant growth are largely unknown. Recent findings suggest that BR receptors associate with G proteins to regulate sugar-responsive growth and development.
BRI1 is required for root vascular cell-fate maintenance, as it regulate the expression and function of RECEPTOR-LIKE PROTEIN 44 (RLP44), which, in turn, associates with the receptor for the peptide hormone phytosulfokine (PSK), which is required for the maintenance of procambial cell identity. RLP44 controls cell fate by connecting BRI1 and PSK signalling.

 

References:

 

  • Peres A. L. G. L., Soares J. S., Tavares R. G., Righetto G., Zullo M.A.T., Mandava N. B., Menossi M., Brassinosteroids, the Sixth Class of Phytohormones: A Molecular View from the Discovery to Hormonal Interactions in Plant Development and Stress Adaptation. Int. J. Mol. Sci. 2019, 20, 331
  • Peng Y., Chen L., Li S., Zhang Y., Xu R., Liu Z., Liu W., Kong J., Huang X., Wang Y., Cheng B., Zheng L. & Li Y. (2018). BRI1 and BAK1 interact with G proteins and regulatesugar-responsive growth and development inArabidopsis. Nature commun.,10.1038/s41467-018-03884-8.
  • Holzwart E., Huerta A. I., Glöckner N., Gómez B. A., Wanke F., Augustin S., Askani J. C., Schürholz A. K., Harter K., and Wolf S. (2018). BRI1 controls vascular cell fate in the Arabidopsis root through RLP44 and phytosulfokine signalling.PNAS. 10.1073/pnas.1814434115.
  • Zhang B., Wang X., Zhao Z., Wang R., Huang X., Zhu Y., Yuan L., Wang Y., Xu X., Burlingame A. L., Gao Y., Sun Y., and Tang W. (2016) OsBRI1 Activates BR Signaling by Preventing Binding between the TPR and Kinase Domains of OsBSK3 via Phosphorylation. Vol. 170, pp. 1149–1161.