MUM4 — Zea mays

Summary

ZM00001EB012590, also known as MUM4, ZmRHM2, ROL1, and several other synonyms on maize chromosome 1, encodes a protein with UDP-glucose 4,6-dehydratase (EC 4.2.1.76) and UDP-L-rhamnose synthase activity, along with UDP-4-keto-6-deoxy-glucose-3,5-epimerase and UDP-4-keto-rhamnose-4-keto-reductase functions. The gene is associated with UDP-rhamnose and UDP-L-arabinose biosynthesis, mucilage and capsule polysaccharide anabolism, flavonol biosynthesis, cell wall organization, and auxin export across the plasma membrane. It has been linked to seed coat mucilage synthesis and composition, root hair development, flavonol glycosylation, cell wall rhamnose content, rhamnogalacturonan I biosynthesis, and seed oil content. The protein localizes to the Golgi membrane, cytosol, nucleus, plasmodesmata, mitochondria, and stress granules. Related genes in other species are linked to mucilage biosynthesis, flavonoid glycoside production, root hair formation, and cell wall rhamnose content.