BJUA06G36540S — Brassica juncea

Summary

BJUA06G36540S (BjPAP3) encodes a PIF3-like basic helix-loop-helix transcription regulator with transcription regulator activator activity, phytochrome binding, nuclear import signal receptor activity, ubiquitin ligase substrate adaptor activity, red/far-red light photoreceptor activity, phosphorelay response regulator activity, phosphorelay sensor kinase activity, transcriptional co-regulator activity, histidine kinase activity, dsDNA binding, transcription coactivator activity, and promoter-specific chromatin binding. This Indian mustard gene on chromosome A06 is associated with positive regulation of phytochrome signaling, seed maturation, gibberellin biosynthesis, and thermomorphogenesis, as well as regulation of auxin biosynthesis and photosynthesis light reactions. It has been linked to diverse agronomic traits including grain yield, flower diameter, fruit set, leaf angle, vegetative vigor, chlorophyll ratio, photoperiod sensitivity, and responses to UV-A, far-red, and blue light. Localization evidence connects the product to plastids, chloroplast nucleoids, nuclear speckles, and the cell wall. Studies of related genes in other species link the family to shade avoidance, circadian clock regulation, and drought stress response.