AXR3 — Arabidopsis thaliana

Summary

AT1G04250 (AXR3, IAA17) of Arabidopsis thaliana encodes an Aux/IAA family protein containing AUX_IAA and PB1-like domains, with DNA-binding transcription factor activity and auxin receptor activity. It is associated with auxin binding, IP6 binding, and ubiquitin-protein transferase activity, and localizes to the nuclear SCF complex, plasmodesmata, and plant-type vacuole. The gene is linked to root meristem growth, stem cell differentiation, meristem initiation, inflorescence phyllotactic patterning, and organ boundary specification. Associations include traits such as fruit senescing quality, sodium content, plant fresh weight, leaf margin morphology, petal number, root branching, and adventitious root number. It is also connected to stress tolerance, disease resistance, senescence, chlorophyll degradation, and auxin biosynthesis. Studies of related genes in other species link the family to root length, seed weight, fruit size, photosynthetic rate, and water use efficiency.