This domain corresponds to the C terminal domain of glycosyl hydrolase family 32. It forms a beta sandwich module [1].

1: The three-dimensional structure of invertase (beta-fructosidase) from Thermotoga maritima reveals a bimodular arrangement and an evolutionary relationship between retaining and inverting glycosidases. Alberto F, Bignon C, Sulzenbacher G, Henrissat B, Czjzek M; J Biol Chem 2004;279:18903-18910. PMID:14973124