Belongs to the glycosyl hydrolase 68 family. According to PubMed:9349714, does not have levansucrase activity, despite a very strong similarity to SacB from B.subtilis. Ser-356 and Gln-363 are present instead of the conserved Phe and positively charged residue Lys/His/Arg, respectively, which could be important for activity. These point mutations might explain the inactivity of the enzyme.