In enzymology, an inulosucrase (EC 2.4.1.9) is an enzyme that catalyzes the chemical reaction

sucrose + (2,1-beta-D-fructosyl)_n ${\displaystyle \rightleftharpoons }$ glucose + (2,1-beta-D-fructosyl)_n+1

Thus, the two substrates of this enzyme are sucrose and (2,1-beta-D-fructosyl)_n, whereas its two products are glucose and (2,1-beta-D-fructosyl)_n+1.

This enzyme belongs to the family of glycosyltransferases, specifically the hexosyltransferases. The systematic name of this enzyme class is sucrose:2,1-beta-D-fructan 1-beta-D-fructosyltransferase. This enzyme is also called sucrose 1-fructosyltransferase.

• BHATIA IS, SATYANARAYANA MN, SRINIVASAN M (1955). "Transfructosidase from Agave vera cruz Mill". Biochem. J. 61 (1): 171–4. PMC 1215761. PMID 13260192.
• DEDONDER R (1952). "[The glucides of the Jerusalem artichoke. III. Synthesis of glucofructosanes in vitro by extracts of different organs of the artichoke.]". Bull. Soc. Chim. Biol. 34 (1–2). Paris: 171–82. PMID 14935737.
• EDELMAN J, BACON JS (1951). "Transfructosidation in extracts of the tubers of Helianthus tuberosus L". Biochem. J. 49 (4): 529–40. PMC 1197545. PMID 14886320.