Hydrolyzes acetyl esters in homogalacturonan regions of pectin. In type I primary cell wall, galacturonic acid residues of pectin can be acetylated at the O-2 and O-3 positions. Decreasing the degree of acetylation of pectin gels in vitro alters their physical properties. A number of isoforms are produced. According to EST sequences. In roots by the parasitic nematodes Heterodera schachtii and Meloidogyne incognita. No visible phenotype under normal growth conditions. Belongs to the pectinacetylesterase family.