VP1 — Zea mays

Summary

ZM00001EB143690 (VP1, also known as ABI3) on maize chromosome 3 encodes a protein with a B3 DNA-binding domain, transcription coactivator activity, sequence-specific DNA binding, and protein dimerization activity. It is associated with phytochrome binding, Hsp90 binding, and phosphorelay response regulator activity. VP1 is associated with maintenance of seed dormancy, acquisition of desiccation tolerance, regulation of seed maturation, raffinose anabolism, and carbohydrate and protein storage. Observed phenotypes include vivipary and altered leaf angle. The gene has been associated with grain dormancy, pre-harvest sprouting tolerance, alpha-amylase activity, popping expansion volume, anthesis-silking interval, seedling vigor, drought stress response, and abscisic acid content. Studies of related genes in other species link the family to seed longevity, oil accumulation, and abscisic acid responsiveness.