This family of glycosyl hydrolases (GH) from CAZy family 18 is mainly found in Bacteroidetes, including the endoglycosidase BT1044 from Bacteroides thetaiotaomicron. This protein folds into the canonical (beta/alpha)8 barrel (TIM barrel) fold common to many GH structures [1].

1: Complex N-glycan breakdown by gut Bacteroides involves an extensive enzymatic apparatus encoded by multiple co-regulated genetic loci. Briliute J, Urbanowicz PA, Luis AS, Basle A, Paterson N, Rebello O, Hendel J, Ndeh DA, Lowe EC, Martens EC, Spencer DIR, Bolam DN, Crouch LI; Nat Microbiol. 2019;4:1571-1581. PMID:31160824