ABI5 — Brassica napus

Summary

BnABI5 (ABI5, GIA1, DPBF1) on chromosome C04 of oilseed rape (Brassica napus) encodes a bZIP transcription factor of the BZIP46-like family. It is associated with DNA-binding transcription activator activity, protein phosphatase binding and regulator activity, and multiple additional molecular functions including aromatic aminotransferase, SUMO transferase and Ca2+/CaM-dependent kinase activities. The gene has been linked to regulation of abscisic acid anabolism, TOR signaling, nitrate assimilation, salicylic acid metabolism, and dicarboxylate metabolism, as well as to traits including seed set percent, endosperm storage protein content, protein content, iron concentration, cadmium concentration, inflorescence length, leaf elongation rate, whole plant size, and responses to nitrogen, phosphorus, light, alkali, copper, magnesium, manganese, and far red light. Studies of related genes in other species connect the family to abscisic acid responsiveness, seed longevity, desiccation tolerance, salt stress tolerance, water use efficiency, oil accumulation, and virus resistance.