STMPK4 — Solanum tuberosum

Summary

PGSC0003DMG400025366, designated STMPK4 on potato chromosome 11, encodes a mitogen-activated protein kinase (MAPK) with serine/threonine and tyrosine kinase activities (EC 2.7.11.24). The product belongs to the MAPK family and contains a protein kinase domain. STMPK4 is associated with the MAPK cascade, intracellular signal transduction, and responses to UV-C, wounding, and immune stimuli. It has been linked to auxin and abscisic acid signaling, anthocyanin biosynthesis, cell wall organization, cell division, cell death, lateral root formation, and syngamy. The protein localizes to both the cytoplasm and nucleus. A link to root length has also been noted. Studies of related genes in other species connect the broader family to stress signaling and developmental processes, though these functions are not yet established for STMPK4 itself.