JAR1 — Nicotiana attenuata

Summary

A4A49_35910 (JAR1/JAR4) encodes a GH3 family protein with IAA amido synthetase activity, adenylyltransferase activity, and jasmonic acid-amido synthetase activity, and is associated with L-leucine, AMP, and amino acid binding. In coyote tobacco, JAR4 is linked to herbivore defense, jasmonic acid metabolism and signaling, cellular auxin homeostasis, anthocyanin metabolism, and regulation of defence response to bacteria. It is associated with protein AMPylation, response to red/far-red light, and mycotoxin response. The gene is associated with numerous agronomic traits including grain yield, panicle number, flower diameter, leaf angle, photosynthetic ability, photoperiod-sensitive flowering time, plant growth hormone response, and responses to insect damage, viral disease, and UV-B light. It is also linked to chilling tolerance, salt stress response, iron uptake, and lignin deposition. Studies of related genes in other species link the family to jasmonoyl-isoleucine biosynthesis, pathogen defense, light signaling, and shade-induced hypocotyl elongation.