PFN1 — Cucumis melo

Summary

MELO3C004595.2 (CmPFN1) on melon chromosome 6 encodes a profilin, a member of the profilin family characterized by the profilin conserved sequence and profilin superfamily domains. The encoded protein binds G-actin, F-actin, proline-rich regions, and phosphatidylinositol, and exhibits phosphatidylinositol kinase activity. CmPFN1 is associated with defense response by cell wall thickening, hypersensitivity, and defense response to fungi. It is linked to actin polymerization or depolymerization, regulation of actin cytoskeleton organization, nuclear movement, phosphatidylinositol phosphate biosynthesis, and regulation of unidimensional cell growth. Associations include lateral root development, inflorescence development, seed germination, seedling development, and leaf development. The protein localizes to the haustorium, cell cortex, spindle, stress granule, plant-type cell wall, nucleolus, plastid, and plasmodesma. Studies of related genes in other species link the family to fungal resistance, heat stress tolerance, salt tolerance, drought tolerance, and abscisic acid response.