Carboxylesterase that mediates deacylation of target proteins (By similarity). Acts as a regulator of growth cone migration. Does not act as an inhibitor of Wnt signaling (PubMed:23365253). Specifically expressed in the muscle pioneers (MPs) during primary motor innervation. Belongs to the pectinacetylesterase family. Notum subfamily. In contrast to other members of the family, it apparently does not inhibit the Wnt signaling pathway, suggesting that it does not mediate depalmitoleoylation of WNT proteins (PubMed:23365253). However, additional evidence is required to confirm these data.