ABI3 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.3HG0308890 (HvABI3) on barley chromosome 3H encodes a B3 DNA-binding domain protein of the LEC2-like family. The protein exhibits sequence-specific DNA binding, transcription coactivator activity, and associations with phytochrome, Hsp90, and ubiquitin-protein transferase activities. HvABI3 is associated with positive regulation of seed maturation, protein storage, cellular response to gibberellin, and regulation of triglyceride catabolism. It has been linked to traits including seed set, seedling vigor, vegetative vigor, photoperiod-sensitive flowering, water and temperature stress responses, iron content, and aphid response. Localization evidence places the product in the cytoplasm, cytosol, plasma membrane, endoplasmic reticulum, and RNA polymerase II complex. Studies of related genes in other species link the family to seed longevity, abscisic acid signaling, oil accumulation, and iron distribution in seed.