Download MendeleyStructural and biochemical basis of Arabidopsis FERONIA receptor kinase-mediated early signaling initiation.
Kong, Y., Chen, J., Jiang, L., Chen, H., Shen, Y., Wang, L., Yan, Y., Zhou, H., Zheng, H., Yu, F., Ming, Z.(2023) Plant Commun 4: 100559-100559
- PubMed: 36774537
- DOI: https://doi.org/10.1016/j.xplc.2023.100559
- Primary Citation of Related Structures:
7XDV, 7XDW, 7XDX, 7XDY - PubMed Abstract:
Accumulating evidence indicates that early and essential events for receptor-like kinase (RLK) function involve both autophosphorylation and substrate phosphorylation. However, the structural and biochemical basis for these events is largely unclear. Here, we used RLK FERONIA (FER) as a model and crystallized its core kinase domain (FER-KD) and two FER-KD mutants (K565R, S525A) in complexes with ATP/ADP and Mg 2+ in the unphosphorylated state. Unphosphorylated FER-KD was found to adopt an unexpected active conformation in its crystal structure. Moreover, unphosphorylated FER-KD mutants with reduced (S525A) or no catalytic activity (K565R) also adopt similar active conformations. Biochemical studies revealed that FER-KD is a dual-specificity kinase, and its autophosphorylation is accomplished via an intermolecular mechanism. Further investigations confirmed that initiating substrate phosphorylation requires autophosphorylation of the activation segment on T696, S701, and Y704. This study reveals the structural and biochemical basis for the activation and regulatory mechanism of FER, providing a paradigm for the early steps in RLK signaling initiation.
Organizational Affiliation:
State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi Key Laboratory for Sugarcane Biology, Guangxi University, Nanning 530004, P.R. China.
