MUM4 — Zea mays

Summary

ZM00001EB397570 (ZmMUM4, also known as ZmRHM1-3 and ZmROL1) on maize chromosome 9 encodes a protein with UDP-L-rhamnose synthase activity, UDP-glucose 4,6-dehydratase activity, UDP-4-keto-6-deoxy-glucose-3,5-epimerase activity, UDP-4-keto-rhamnose-4-keto-reductase activity, DTDP-glucose 4,6-dehydratase activity, UDP-D-xylose-4-epimerase activity, UDP-glucose 4-epimerase activity, and redox activity, classified as EC 4.2.1.76. The gene is associated with UDP-rhamnose anabolism, UDP-L-arabinose anabolism, mucilage anabolism, flavonol biosynthetic process, cell wall organization and modification, auxin export across the plasma membrane, and responses to UV, UV-A, UV-B, and nitrate. It is linked to seed coat mucilage synthesis and composition, root hair development, flavonol glycosylation, cell wall composition, seed oil content, and plant growth. The encoded protein localizes to the Golgi stack membrane, plasmodesma, cytosol, nucleus, mitochondria, and stress granule. Studies of related genes in other species connect the family to mucilage biosynthesis, root hair formation, rhamnose content, and flavonoid glycoside production.