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Updated: May 31, 2026

A High-content Assay for Monitoring AMPA Receptor Trafficking
Published on: January 28, 2019
News on ABA transport, protein degradation, and ABFs/WRKYs in ABA signaling
Regina Antoni1, Lesia Rodriguez, Miguel Gonzalez-Guzman
1Instituto de Biologia Molecular y Celular de Plantas, Consejo Superior de Investigaciones Cientificas-Universidad Politecnica de Valencia, Avd de los Naranjos, ES-46022 Valencia, Spain.
Abstract:
The recent identification of abscisic acid (ABA) transporters provides an important insight into the delivery of ABA from the vascular system and its uptake by target cells. A putative connection with PYR/PYL receptors is envisaged, linking ABA uptake and intracellular perception by a fast and efficient mechanism. Downstream signaling of the core pathway involves regulation of ABA-responsive element binding factors (ABFs/AREBs) through phosphorylation, ubiquitination, and sumoylation in the case of ABI5. Several E3 ligases appear to regulate ABA signaling either positively or negatively, although relatively few targets are known yet. ABFs/AREBs are themselves subjected to transcriptional regulation, and some transcription factors (TFs) harboring the WRKY domain (WRKYs) appear to regulate their expression through W-box sequences present in the promoters of ABFs/AREBs.
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