Description of AtCAX4 in Response to Abiotic Stress in Arabidopsis

Author:

Bu YuanyuanORCID,Fu Weichao,Chen Jiangpo,Takano Tetsuo,Liu Shenkui

Abstract

High-capacity tonoplast cation/H+ antiport in plants is partially mediated by a family of CAX transporters. Previous studies have reported that CAX activity is affected by an N-terminal autoinhibitory region. CAXs may be present as heterodimers in plant cells, and this phenomenon necessitates further study. In this study, we demonstrate that there is an interaction between CAX4 and CAX1 as determined by the use of a yeast two-hybrid system and a bimolecular fluorescence complementation assay. More specifically, the N-terminal of CAX4 interacts with CAX1. We further observed the over-expression and either a single or double mutant of CAX1 and CAX4 in response to abiotic stress in Arabidopsis. These results suggest that CAX1 and CAX4 can interact to form a heterodimer, and the N-terminal regions of CAX4 play important roles in vivo; this may provide a foundation for a deep study of CAX4 function in the future.

Funder

Program for Changjiang Scholars and Innovative Research Team in University

Publisher

MDPI AG

Subject

Inorganic Chemistry,Organic Chemistry,Physical and Theoretical Chemistry,Computer Science Applications,Spectroscopy,Molecular Biology,General Medicine,Catalysis

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