Protein
Chitooligosaccharide oxidase
Organism
Gibberella zeae (strain PH-1 / ATCC MYA-4620 / FGSC 9075 / NRRL 31084)
Function
Catalyzes the selective oxidation of C1 hydroxyl moieties on chitooligosaccharides with concomitant reduction of molecular oxygen to hydrogen peroxide. This results in the formation of the corresponding lactones, which typically undergo spontaneous hydrolysis. Chitooligosaccharides are homo- or heterooligomers of N-acetylglucosamine (GlcNAc) and D-glucosamine which are linked through beta-1,4-glycosidic bonds. For optimal substrate binding at least 2 GlcNAc units are needed, and chitooligosaccharide oxidase is most efficient on chitobiose, chitotriose and chitotetraose.
Similarity
Belongs to the oxygen-dependent FAD-linked oxidoreductase family.
Sequence
MHFNTLTCVLVGLVAHTSAVPTKREAVNSCLTQAKVPTDAQGSQSWKEDGTAYNLRLPFEPAAIAVPTTVAQVSAAVECGAKHGVAISAKSGGHSYTSLGFGGEDGHLMIELDRMYSVKLAKDGTAKIQPGARLGHVATELWNQGKRALAHGTCPGVGLGGHALHGGYGMVARKHGLTLDLMIGATVVLPTGKVVHCSKTENSDLFWGIRGAGANFGVVVELEFQTFAAPEKITYFDIGLNWDQNTAPQGLYDFQEFGKGMPAEITMQMGVSKNGYSVDGAYIGDEASLRKALQPLVQKFGGVQVTATTVDWMGLVTHFAGAGVNVNPTSASYDAHDNFYASSLAAPALTLAEFKSFVNFVSTTGKSSSHSWWLQMDITGGTYSAVSKPKPSDTAYVHRDTLLLFQFYDSVAATAQYPSDGFNLIKGLRQSISSSLKAGTWGMYANYPDSQIKNDRATEMYWGSNVAKLEAVKAKYDPKNLFRNPQSIKPKA