Involved in degradation of plant cell wall polysaccharides. Bifunctional esterase that possesses both acetyl esterase and ferulic acid esterase activities. Has deacetylase activity towards acetylated xylo-oligosaccharides smaller than xylo-heptaose, as well as from glucose-pentaacetate. Is also able to release ferulic acid from methylferulate, and from the more natural substrates wheat bran, corn fiber, and XOS(FA,Ac), a corn fiber-derived substrate enriched in O-acetyl and ferulic acid esters. feruloyl-polysaccharide + H2O = ferulate + polysaccharide. Optimum pH is 6.5 with glucose-pentaacetate as substrate. Active from pH 5.0 to 8.0. Optimum temperature is 35 degrees Celsius with glucose-pentaacetate as substrate. Active from 20 to 50 degrees Celsius. Still exhibits 40 to 70% of the maximum activity after 20 hours of incubation at 50 degrees Celsius. Glycan degradation; xylan degradation. By growth on ester-enriched corn oligosaccharides. Is predicted to have two esterase domains corresponding to distinct carbohydrate esterase families, CE1 and CE6. It can be hypothesized that the release of acetic acid is related to the CE6 domain, while the release of ferulic acid may relate to the CE1 domain. In the N-terminal section; belongs to the carbohydrate esterase 6 family.