Abscisic acid (ABA) plays a central role in coordinating plant adaptive responses to abiotic stress and also regulates plant growth and development. Key players in ABA signal transduction include the type 2C protein phosphatases (PP2Cs) ABI1 and ABI2, which act by negatively regulating ABA responses.
In this study, interactors of PP2Cs ABI1 and ABI2 were identified and named Regulatory Components of the ABA Receptors (RCARs).
Functional analysis showed that RCAR proteins were able to bind ABA, to mediate ABA-dependent inactivation of ABI1 or ABI2 in vitro, and to stimulate ABA signaling in protoplast cells. As such, they act as ABA receptors.
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Abscisic acid (ABA) plays a central role in coordinating plant adaptive responses to abiotic stress and also regulates plant growth and development. Key players in ABA signal transduction include the type 2C protein phosphatases (PP2Cs) ABI1 and ABI2, which act by negatively regulating ABA responses.
In this study, interactors of PP2Cs ABI1 and ABI2 were identified and named Regulatory Components of the ABA Receptors (RCARs).
Functional analysis showed that RCAR proteins were able to bind ABA...
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