PT — Solanum lycopersicum

Summary

SlPT (SOLYC11G045250.1) on tomato chromosome 11 encodes a metallocarboxypeptidase with carboxypeptidase activity, containing a Peptidase_M28B domain and capable of metal and protein binding. The gene is associated with diverse developmental and physiological processes, including meristem cell maintenance, photomorphogenesis, flower and fruit development, root development, leaf vascular tissue pattern formation, plant organ senescence, and regulation of seed maturation. It is linked to negative regulation of gene silencing by miRNA and proteolysis. Associations with shoot regeneration, root architecture, biomass accumulation, dehydration resistance, leaf number, flowering time, meristem size, senescence, seed production, stomatal development, cytokinin levels, and embryo development have been observed. The encoded protein localises to the endoplasmic reticulum and plasma membrane. Studies of related genes in other species link the family to shoot meristem size, cytokinin levels, miRNA-mediated translational repression, and stress tolerance.