FBI1 — Arabidopsis thaliana

Summary

AT1G02340 (FBI1/HFR1) encodes a basic helix-loop-helix (bHLH) transcription factor with DNA-binding, protein dimerization, and transcriptional co-regulator activities, and also possesses ubiquitin ligase and protein kinase activities. It is associated with light signaling pathways, including detection of light, far-red signaling, and responses to UV-A and light intensity. The gene is linked to regulation of photosynthesis, anthocyanin metabolism, auxin biosynthesis, thermomorphogenesis, and salinity response. It localizes to the nucleus, cytosol, and various ubiquitin ligase complexes. Traits associated with AT1G02340 include seedling height, cotyledon size, far-red and blue light sensitivity, grain yield, vegetative vigor, leaf area, submergence tolerance, and heterosis. Related genes in other species are linked to shade tolerance and grain yield.