What question did this study set out to answer?

The study aims to uncover the mechanism of how EPSIN1 regulates the abundance of PDR9 at the plasma membrane.

April 25, 2026

Clathrin adaptor EPSIN1 ( EPS1 ) modulates plasma membrane abundance of PLEIOTROPIC DRUG RESISTANCE PDR9 for effective hormone homeostasis

Key Points

The study aims to uncover the mechanism of how EPSIN1 regulates the abundance of PDR9 at the plasma membrane.
Used biochemical fractionation to analyze EPSIN1 interactions.
Employed live-cell imaging to visualize PDR9 localization.
Conducted physiological assays to assess hormone homeostasis.
EPSIN1 is identified as a modulator of PDR9 at the plasma membrane during IBA-dependent processes.
Increased EPSIN1 levels enhance PDR9 abundance at the plasma membrane, improving IBA responses.
Findings indicate EPSIN1's role extends beyond plant immunity to hormone homeostasis.

Abstract

The cellular machinery that directs the indole-3-butyric acid (IBA) effluxer PLEIOTROPIC DRUG RESISTANCE 9 (PDR9) to the outer plasma membrane (PM) domain of the root epidermis remains poorly understood. This study combines biochemical fractionation, live-cell imaging, and physiological assays to identify the trans-Golgi Network-localized clathrin adaptor EPSIN1 (EPS1) as a novel modulator of PDR9 abundance at the root PM for IBA-dependent physiological processes. These findings expand EPS1's roles from plant immunity to hormone homeostasis, thereby advancing the limited understanding of biological functions for plant EPSINs.

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Cite This Study

Nguyen et al. (Wed,) studied this question.

synapsesocial.com/papers/69ec5b8a88ba6daa22dacfe6 https://doi.org/https://doi.org/10.1111/nph.71208

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