AT3G19290 — Arabidopsis thaliana

Summary

AT3G19290 (ABF4, also known as AREB2) encodes a bZIP transcription factor from the BZIP46-like family on Arabidopsis thaliana chromosome 3. The product possesses cis-regulatory region sequence-specific DNA binding, transcription coactivator activity, and multiple kinase and phosphatase activities including calcium-dependent protein kinase activity. ABF4 is associated with tuberization, tuber production, yield and quality, as well as chlorophyll a breakdown, mycose metabolism, far-red signaling, regulation of stomatal opening, and responses to water, carbon dioxide, and absence of light. The gene is linked to traits including tuberous root tuber weight, spikelet fertility, axillary bud dormancy, chilling stress response, photoperiod sensitivity, leaf water potential, water stress response, hydrogen peroxide content, and fatty acid composition. ABF4 localises to the nucleus, cytosol, plastid, mitochondria, Golgi, and endomembrane compartments. Studies of related genes in other species connect the family to drought sensitivity, heat tolerance, photosynthesis, tuber induction, and pathogen susceptibility.