Protein
Endo-beta-N-acetylglucosaminidase
Organism
Bifidobacterium longum subsp. infantis (strain ATCC 15697 / DSM 20088 / JCM 1222 / NCTC 11817 / S12)
Function
Endoglycosidase with broad specificity that cleaves the chitobiose core of high mannose and complex N-linked glycans. Is able to release N-glycans from diverse host glycoproteins such as human and bovine lactoferrin, immunoglobulins A and G, and ribonuclease B. Is active directly on human breast milk - a complex matrix of lipids, oligosaccharides, and proteins with disparate glycosylation types - successfully removing a significant proportion of the total amount of N-glycans. Does not recognize O-linked glycans or free human milk oligosaccharides (HMO).
Similarity
Belongs to the glycosyl hydrolase 18 family.
Sequence
MTFIKQMMPRYVASMTAGIVAAAMAATCAFAPVANADAVSPTQETIQSTGRHFMVYYRAWRDVTMKGVNTDLPDDNWISMYDIPYGVDVVNIFSYVPSGQEEQAQPFYDKLKSDYAPYLHSRGIKLVRGIDYTGVAVNGFRTFMKEQNKTESEATEADYDAYAKQVIDKYMISVGLDGLDIDMEAHPNDADVKISDNVIRALSKHIGPKSAKPDTTMFLYDTNGSYLNPFKNVAECFDYVAYQQYGSSSDRTARAAADYQPYIGNEFVPGLTFPEEGDMNNRWYDATEPYEESHFYQVASYVREHNLGGMFVYALDRDGRNYDEDLRRIVPSNLLWTKTAIAESEGMALDTAKTAANHYLDRMSLRQVIDDNAASADKARDMVGKAANLYETNKAVLGGDYGEGFSNTYDPTLEAGLLGIDISVLQQQIDKSSEIIGADTAESDAKTALRMARDAAIDGLTGKIYTADQVSAWSQALKAALDATVPVPTPDSTDQNGNRDKVTNHKVQGQPKQLSATGISTDIIVAVGVTLAIAGVALSLSRKLS