VP14 — Zea mays

Summary

ZM00001EB140130, the maize VP14 gene on chromosome 3, encodes a protein with 9-cis-epoxycarotenoid dioxygenase activity. It also carries annotation for carotenoid dioxygenase, acyltransferase, and transcription corepressor activities, and is localized to both the chloroplast stroma and nucleus. VP14 is associated with abscisic acid concentration and biosynthesis, water stress tolerance and response traits, stomatal resistance, UV-B light sensitivity and tolerance, grain color, lateral root number, and root and meristem development. The gene is linked to carotene breakdown, abscisic acid and auxin anabolism, seed maturation, endosperm development, stomatal closure, and responses to UV-A and UV-B. Studies of related genes in other species suggest the family may also include histone acetyltransferase and PHD-type domain-containing proteins.