This entry represents the second beta sandwich domain found in enzymes belonging to the glycosyl hydrolase 127 family [1]. The beta-sandwich domain is somewhat similar to the N-terminal domain of ErbB4 kinase and is involved in formation of a dimer, which is created by a crystallographic 2-fold axis [1].

1: Crystal structure of glycoside hydrolase family 127 beta-l-arabinofuranosidase from Bifidobacterium longum. Ito T, Saikawa K, Kim S, Fujita K, Ishiwata A, Kaeothip S, Arakawa T, Wakagi T, Beckham GT, Ito Y, Fushinobu S; Biochem Biophys Res Commun. 2014;447:32-37. PMID:24680821

2: Complex pectin metabolism by gut bacteria reveals novel catalytic functions. Ndeh D, Rogowski A, Cartmell A, Luis AS, Basle A, Gray J, Venditto I, Briggs J, Zhang X, Labourel A, Terrapon N, Buffetto F, Nepogodiev S, Xiao Y, Field RA, Zhu Y, O'Neil MA, Urbanowicz BR, York WS, Davies GJ, Abbott DW, Ralet MC, Martens EC, Henrissat B, Gilbert HJ; Nature. 2017;544:65-70. PMID:28329766