NPR1 — Brassica juncea

Summary

BJUA01G34360S, designated BjNPR4, encodes a member of the NPR1/NIM1-like protein family characterized by BTB/POZ, ankyrin repeat, and zinc-finger domains. The product exhibits salicylic acid binding, calmodulin binding, and sequence-specific DNA binding activities, and is annotated as a DNA binding transcription factor. BjNPR4 is associated with the regulation of systemic acquired resistance, salicylic acid- and jasmonic acid-mediated signaling pathways, defense responses to bacteria, fungi, and herbivores, as well as stipule development, floral organ abscission, and response to xenobiotic stimuli. The protein localizes to the nucleus, cytoplasm, and plasma membrane. BjNPR4 has been linked to agronomic traits including disease tolerance, drought tolerance, water use efficiency, plant height, panicle length, leaf length, flowering time, nitrogen and nitrate sensitivity, and root development. Studies of related genes in other species connect the family to innate immune response and salicylic acid-induced PR-1 expression.