MYB3 — Nicotiana attenuata

Summary

A4A49_10038, designated MYB3/MYB4 in coyote tobacco (Nicotiana attenuata) on chromosome 3, encodes a plant MYB transcription factor with a Myb DNA-binding domain and SANT/Myb motif. The protein exhibits sequence-specific DNA binding, transcription cis-regulatory region binding, protein dimerization, and protein phosphatase activity. This gene is associated with specialized metabolite biosynthesis, herbivore resistance, and anti-herbivore defence in this species. It is linked to regulation of flavonoid, anthocyanin, proanthocyanidin, and phenylpropanoid metabolism, as well as cinnamic acid anabolism, trichome differentiation and spacing, oviposition, and response to herbivore and iron ion starvation. Additional associations include leaf trichome density, flavonoid and anthocyanin content, UV-B light sensitivity, jasmonic acid content, brassinosteroid content, flowering time, seed development, root morphology, and biotic and abiotic stress responses.