NPH3 — Arabidopsis thaliana

Summary

AT5G64330 (NPH3) in Arabidopsis thaliana encodes a member of the NPH3/RPT2-like family, containing BTB/POZ and NPH3 domains, and exhibits blue light photoreceptor activity, FMN binding, and protein kinase activity. The gene is associated with phototropism, including shoot and root phototropism responses, as well as UV-B phototropism and photogravitropic equilibrium. It is linked to auxin transport and localization, particularly basipetal auxin transport and protein localization involved in polar auxin transport, and to differential growth, petiole positioning, and leaf angle. Associations extend to chloroplast accumulation movement, organogenesis, and responses to biotic stress including bacterial and viral disease responses. The gene is also connected to grain size, biomass yield, and seed development traits. Studies of related genes in other species link the family to organogenesis defects and non-host resistance in rice.