This domain is C-terminal to the catalytic sucrose phosphorylase beta/alpha barrel domain. It adopts a beta-sandwich fold, with Greek-key topology and is functionally uncharacterised [1].
Mirza O, Skov LK, Sprogoe D, van den Broek LA, Beldman G, Kastrup JS, Gajhede M.
Structural rearrangements of sucrose phosphorylase from Bifidobacterium adolescentis during sucrose conversion.
J. Biol. Chem. 281 2006 35576-84
[PubMed: 16990265] http://dx.doi.org/10.1074/jbc.M605611200