plaa2 — Cucumis melo

Summary

MELO3C010017.2 (symbol plaa2) on melon chromosome 3 encodes a protein with a Glyco_hydro_28 domain and a pectin lyase fold, possessing exo-D-galacturonase and polygalacturonase activity. This gene is associated with cell wall disassembly and modification during abscission, fruit dehiscence and ripening, pectin breakdown, anther dehiscence, pollen tube development, pollen germination and pollen development, as well as protein processing, signal transduction, sucrose metabolism, carbohydrate metabolism, and NO storage. The encoded product localises to the pollen wall, vesicle, apoplast, ER, Golgi complex, and extracellular. The gene is also linked to respiration rate, sucrose content, and sugar content. Studies of related genes in other species connect the family to polygalacturonase activity (EC 3.2.1.15) and exo-polygalacturonase activity (EC 3.2.1.67).