Acetylxylan esterase involved in the hydrolysis of xylan, a major structural heterogeneous polysaccharide found in plant biomass representing the second most abundant polysaccharide in the biosphere, after cellulose. Degrades acetylated xylans by cleaving acetyl side groups from the hetero-xylan backbone. Deacetylation of xylans and xylo-oligosaccharides. Inactivated by di-isopropylfluorophosphate and phenylmethylsulfonylfluorid (PMSF), a specific inhibitor of serine esterases. Optimum pH is 7.0. Activity is significantly retained from pH 6.0 to 9.0. Activity is decreased at temperatures higher than 40 degrees Celsius. Glycan degradation; xylan degradation. Monomer. Belongs to the carbohydrate esterase 1 (CE1) family. AxeA subfamily. The C-terminal carbohydrate-binding module (CBM) extension found in some acetylxylan esterases from other species is absent.