Functional exploration of Pseudoalteromonas atlantica as a source of hemicellulose-active enzymes: Evidence for a GH8 xylanase with unusual mode of action.

•Pseudoalteromonas atlantica produced a high diversity of polysaccharide-degrading enzymes.•The marine bacterium Pseudoalteromonas atlantica secreted enzymes active towards hemicelluloses from terrestrial plants.•β-xylosidase, α-arabinofuranosidase and acetylesterase activities were evidenced in the secretome of Pseudoalteromonas atlantica.•The GH8 protein present in Pseudoalteromonas atlantica genome is a xylanase with unusual product profile.