OsMAPK20-1 and OsMAPK20-4 phosphorylate OsCK2β3 to regulate its stability in response to phosphate starvation in rice.

Abstract excerpt

Phosphorus is crucial for plant growth. Rice (Oryza sativa) OsCK2, composed of the catalytic subunit OsCK2α3 and the regulatory subunit OsCK2β3, plays a role in regulating phosphate (Pi) homeostasis. The function of OsCK2 activity depends on phosphorylation of OsCK2β3. We show that the plant-specific N-terminal domain in OsCK2β3, rather than the conserved β subunit domain, is responsible for its stability. Both...

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