Alpha-L-arabinofuranosidase involved in the degradation of arabinoxylan, a major component of plant hemicellulose. Able to hydrolyze 1,5-, 1,3- and 1,2-alpha-linkages not only in L-arabinofuranosyl oligosaccharides, but also in polysaccharides containing terminal non-reducing L-arabinofuranoses in side chains, like L-arabinan, arabinogalactan and arabinoxylan. Hydrolysis of terminal non-reducing alpha-L-arabinofuranoside residues in alpha-L-arabinosides. Optimum pH is 4.8. Optimum temperature is 65 degrees Celsius. Glycan metabolism; L-arabinan degradation. Expressed in presence of L-arabinol and repressed in presence of glucose and glycerol. Expression is also pH regulated probably through the action of the pacC transcription factor and is higher at acidic pHs. Organized into two domains: an N-terminal catalytic domain and a C-terminal arabinose-binding domain (ABD). Belongs to the glycosyl hydrolase 54 family.