This domain is C-terminal to the catalytic sucrose phosphorylase beta/alpha barrel domain which adopts a beta-sandwich fold with Greek-key topology [1,2,3].

1: Crystal structure of sucrose phosphorylase from Bifidobacterium adolescentis. Sprogoe D, van den Broek LA, Mirza O, Kastrup JS, Voragen AG, Gajhede M, Skov LK; Biochemistry. 2004;43:1156-1162. PMID:14756551

2: Structural rearrangements of sucrose phosphorylase from Bifidobacterium adolescentis during sucrose conversion. Mirza O, Skov LK, Sprogoe D, van den Broek LA, Beldman G, Kastrup JS, Gajhede M; J Biol Chem. 2006;281:35576-35584. PMID:16990265

3: Sucrose Phosphorylase and Related Enzymes in Glycoside Hydrolase Family 13: Discovery, Application and Engineering. Franceus J, Desmet T; Int J Mol Sci. 2020; [Epub ahead of print] PMID:32260541