IAA3 — Arabidopsis thaliana

Summary

AT1G04240, also known as IAA3 or SHY2 (SHORT HYPOCOTYL 2), encodes an AUX/IAA family protein with a PB1-like domain. It is annotated with transcription corepressor activity, auxin binding, miRNA binding, and red/far-red light photoreceptor activity. In Arabidopsis, IAA3 is associated with cotyledon size and response to low light intensity. It is linked to numerous processes including hormone transport, cytokinin breakdown, glucosinolate breakdown, cGMP and riboflavin anabolism, tetrapyrrole metabolism, halotropism, nuclear transport, energy homeostasis, M phase, inflorescence phyllotactic patterning, sepal development, tracheary element differentiation, and inflorescence meristem growth. It localizes to the nucleus, cytosol, plasma membrane, plant-type vacuole, and SCF ubiquitin ligase complexes. IAA3 is associated with traits such as seedling cotyledon size, light quality response, far-red and blue light sensitivity, leaf chlorophyll content, root branching, adventitious root number, carpel number, fruit position, leaf angle, silique morphology, starch grain synthesis, nitrate transport and sensitivity, glyphosate sensitivity, water stress response, and acid sensitivity.