[1] PGs can be produced by pathogens to degrade the polygalacturonan component of plant cell walls.
However, no inhibition of endogenous plant PGs that participate in fruit ripening by PGIPs have been reported.
Small oligosaccharides produced from PG activity act as signals for the production of PGIPs within the plant.
The specificity of the PGIPs for certain pathogenic PGs may significantly contribute to different crops being susceptible or resistant to different bacterial and fungal infections.
A non-glycosylated version of PGIP-2 from Phaseolus vulgaris (bean) was successfully crystallized and analyzed by X-ray diffraction in 2003.