MKK3 — Triticum aestivum

Summary

TRAESCS5B02G565100 (TaMKK3) on wheat chromosome 5B encodes a protein with a protein kinase domain, possessing MAPKK activity, protein serine/threonine kinase activity, and DNA-binding transcription factor activity. The gene is directly associated with pre-harvest sprouting in wheat. It has been linked to sprouting tolerance, seed dormancy, vivipary, and grain dormancy, as well as to seed protein content, grains per spike, spikelet number, tiller number, days to heading and maturity, and spike length. Associations also include responses to abiotic stress, drought, stripe rust, aphids, and herbivores, along with abscisic acid signaling, jasmonic acid and ethylene-mediated induced systemic resistance, stomatal development and closure, leaf senescence, and MAPK cascade regulation. The protein localizes to the nucleus, cytoplasm, plasmalemma, and nucleolus. Studies of related genes in other species link the family to drought resistance, fungal pathogen resistance, and phosphate deficiency response.