PAP1 — Brassica napus

Summary

BnPAP1 (also known as PAP1-D, MYB90, and MYB75) on chromosome C06 encodes a Myb-domain transcription factor with DNA-binding, protein dimerization, and ubiquitin ligase activities. It is associated with the regulation of flavonoid, proanthocyanidin, and anthocyanin biosynthesis, as well as pigmentation, petal development, seed growth, mucilage extrusion, trichome spacing, and responses to UV-A light and sucrose signaling. The gene is linked to flower and seed coat color, flavonoid content, leaf trichome density, seed longevity, cadmium and iron concentration, lignin biosynthesis, phosphorus uptake, and responses to light quality and viral disease. It localizes to the nucleus, root hairs, and ubiquitin ligase complexes. Studies of related genes in other species connect the family to anthocyanin pigmentation, insect resistance, root hair and trichome differentiation, and salt stress tolerance.