LAC4 — Phaseolus vulgaris

Summary

PHAVU_010G073800, designated PvLAC4 on chromosome 10 of French bean, encodes a laccase, a p-diphenol:oxygen oxidoreductase that binds copper and performs redox activity. The protein belongs to the multicopper oxidase family and is localised to the apoplast, plant-type cell wall, and extracellular space. PvLAC4 is associated with lignin breakdown and anabolism, as well as secondary cell wall biogenesis. The gene has been linked to cadmium tolerance, saccharification yield, plant height, lignin biosynthesis and deposition, fiber development, and seed yield. Studies of related genes in other species connect the family to defense responses, herbivore defense, xylem transport, lignin polymerization, and the syringyl/guaiacyl lignin unit ratio.