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. Displays the greatest hydrolytic activity toward alpha-naphthylacetate (C2), lower activity toward alpha-naphthylpropionate (C3) and no detectable activity toward acyl-chain substrates containing four or more carbon atoms. Deacetylation of xylans and xylo-oligosaccharides. Optimum pH is 6.0. The enzyme is stable between pH 6.0 and 7.0. Optimum temperature is 45 degrees Celsius. Unstable at 40 degrees Celsius with a half life of less than 60 min at 40 degrees Celsius and 10 min at 50 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 soem acetylxylan esterases from other species is absent.