PAP1 — Brassica napus

Summary

BnPAP1 (also known as PAP1, MYB90, and MYB75) on chromosome C06 of oilseed rape encodes a Myb-domain transcription factor with DNA-binding, transcription factor, protein dimerization, ubiquitin ligase, and protein kinase activities. It is associated with the regulation of flavonoid, proanthocyanidin, and anthocyanin metabolism, as well as responses to UV-A light, sucrose signaling, and dexamethasone. The gene has been connected to seed growth, mucilage anabolism and extrusion, petal development, pigmentation, trichome spacing, and epidermal cell fate specification. It localizes to the nucleus, root hair, and ubiquitin ligase complexes. Associations include flower and seed coat color, flavonoid content, root epidermal cell length, leaf trichome density, seed longevity, cadmium concentration, iron concentration, lignin biosynthesis, phosphorus uptake, and responses to light quality, UV, and viral disease. Studies of related genes in other species link the family to anthocyanin pigmentation, insect resistance, salt stress tolerance, and phosphate deficiency tolerance.