MPK3 — Brachypodium distachyon

Summary

BRADI_1G65810V3 (MPK3, also known as WD40-178) on chromosome 1 of Brachypodium distachyon encodes a mitogen-activated protein kinase (MAPK) with serine/threonine and tyrosine kinase activities, classified as EC 2.7.11.24. This gene is associated with the MAPK cascade, intracellular signal transduction, and responses to abiotic stresses including salinity, freezing, UV-B and UV-C, oxidative stress, osmotic stress, and chitin. It is linked to inflorescence and ovule development, pollen-pistil interaction, pollen tube guidance, and camalexin biosynthesis. The encoded protein localizes to the cytoplasm, nucleus, cell cortex, and stress granules. Studies of related genes in other species connect the MPK3 family to grain size, grain weight, plant height, leaf angle, drought and submergence tolerance, and cytokinin content.