RT Journal Article
SR Electronic
T1 An XA21-Associated Kinase (OsSERK2) regulates immunity mediated by the XA21 and XA3 immune receptors
JF bioRxiv
FD Cold Spring Harbor Laboratory
SP 000950
DO 10.1101/000950
A1 Xuewei Chen
A1 Shimin Zuo
A1 Benjamin Schwessinger
A1 Mawsheng Chern
A1 Patrick E. Canlas
A1 Deling Ruan
A1 Xiaogang Zhou
A1 Jing Wang
A1 Arsalan Daudi
A1 Christopher J. Petzold
A1 Joshua L. Heazlewood
A1 Pamela C. Ronald
YR 2013
UL http://biorxiv.org/content/early/2013/11/26/000950.abstract
AB The rice XA21 immune receptor kinase and the structurally related XA3 receptor, confer immunity to Xanthomonas oryzae pv. oryzae (Xoo), the causal agent of bacterial leaf blight. Here we report the isolation of OsSERK2 (rice somatic embryogenesis receptor kinase 2) and demonstrate that OsSERK2 positively regulates immunity mediated by XA21 and XA3 as well as the rice immune receptor FLS2 (OsFLS2). Rice plants silenced for OsSerk2 display altered morphology and reduced sensitivity to the hormone brassinolide. OsSERK2 interacts with the intracellular domains of each immune receptor in the yeast-two-hybrid system in a kinase activity dependent manner. OsSERK2 undergoes bidirectional trans-phosphorylation with XA21 in vitro and forms a constitutive complex with XA21 in vivo. Taken together, these results demonstrate an essential role for OsSERK2 in the function of three rice immune receptors and suggest that direct interaction with the rice immune receptors is critical for their function.