PK1 — Zea mays

Summary

ZmPK1 (PK1) on maize chromosome 4 encodes a pyruvate kinase (EC 2.7.1.40) with pyruvate kinase activity, binding potassium, magnesium, ATP, and mRNA. The gene is associated with the regulation of gluconeogenesis, pyruvate and alanine anabolism, carbohydrate utilization and storage, pigment accumulation, vascular transport, and responses to starvation and stimulus. It has been linked to grain yield, grain dry weight, grain weight, grain filling period, total soluble sugar and protein content, drought and cold tolerance, stomatal resistance, photochemical quenching, root morphology, phosphorus and nitrate uptake, cell membrane stability, and heterosis. The encoded protein localizes to the cytosol, chloroplast stroma, apoplast, plasmalemma, endoplasmic reticulum, Golgi, vacuole, and plasmodesmata. Related genes in other species are linked to seed, leaf, root, stem, culm, and dwarf phenotypes.