PRR2 — Cucumis melo

Summary

MELO3C003375.2 (CmPRR2) on melon chromosome 5 encodes a phosphorelay response regulator transcription factor with DNA-binding and protein-binding activity, belonging to the GLK1/2-like and Myb-domain families. In melon, CmPRR2 is associated with rind color and spotted rind phenotypes, as well as chlorophyll metabolism, circadian rhythm, cytokinin signaling, calcium signaling, and responses to cold, salinity, abscisic acid, and bacteria. It localizes to the nucleus, cytosol, and cytoplasm. The gene is also linked to fruit color, fruit development, disease resistance, salt tolerance, and brassinosteroid sensitivity. Studies of related genes in other species connect the family to carotenoid biosynthesis, chlorophyll content, exocarp thickness, and plant immunity, though these associations are not yet established in melon.