PG45 — Zea mays

Summary

ZmPG45 (PG45) on maize chromosome 6 encodes a polygalacturonase with exo-D-galacturonase activity (EC 3.2.1.67), belonging to the Glyco_hydro_28 and pectin lyase fold families. The gene is associated with pectin breakdown, pollen adhesion, C4 photosynthesis, phloem loading, and immune evasion, and its product localises to the pollen wall, extracellular space, vesicles, ER, and Golgi. ZmPG45 has been linked to grain yield, seed weight, grain size, grain lysine content, amylopectin content, plant height, root length, mesocotyl length, chlorophyll content, drought tolerance, pollen fertility, cytoplasmic male sterility, ash content, leaf morphology, and biotic stress. Studies of related genes in other species connect the family to cell wall phenotypes and leaf morphology traits.