Plant biology

BKI1 Keeps the Receptor Quiet

Science's STKE  29 Aug 2006:
Vol. 2006, Issue 350, pp. tw298
DOI: 10.1126/stke.3502006tw298

The plant steroid hormone, brassinosteroid, is perceived at the cell membrane through interaction with a membrane-bound receptor. Subsequent signaling events carry the signal to the nucleus. Wang and Chory now clarify a new interacting partner that regulates the receptivity of the receptor at the cell membrane. BKI1 keeps the signaling pathway relatively quiet until the brassinosteroid appears and activates the system.

X. Wang, J. Chory, Brassinosteroids regulate dissociation of BKI1, a negative regulator of BRI1 signaling, from the plasma membrane. Science 313, 1118-1122 (2006). [Abstract] [Full Text]