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In enzymology, a sucrose:sucrose fructosyltransferase (EC 2.4.1.99) is an enzyme that catalyzes the chemical reaction

2 sucrose ${\displaystyle \rightleftharpoons }$ D-glucose + beta-D-fructofuranosyl-(2→1)-beta-D-fructofuranosyl alpha-D-glucopyranoside

Hence, this enzyme has one substrate, sucrose, but 2 products: D-glucose and beta-D-fructofuranosyl-(2→1)-beta-D-fructofuranosyl alpha-D-glucopyranoside.

This enzyme belongs to the family of glycosyltransferases, specifically the hexosyltransferases. The systematic name of this enzyme class is sucrose:sucrose 1'-beta-D-fructosyltransferase. Other names in common use include SST, sucrose:sucrose 1-fructosyltransferase, sucrose-sucrose 1-fructosyltransferase, sucrose 1F-fructosyltransferase, and sucrose:sucrose 1F-beta-D-fructosyltransferase.

References

• Henry RJ; Darbyshire B (1980). "Sucrose:sucrose fructosyltransferase and fructan:fructan fructosyltransferase from Allium cepa". Phytochemistry. 19 (6): 1017–1020. doi:10.1016/0031-9422(80)83050-0.
• CJ, Boller T, Wiemken A (2000). "Cloning and functional analysis of sucrose:sucrose 1-fructosyltransferase from tall fescue". Plant Physiol. 124 (3): 1217–28. doi:10.1104/pp.124.3.1217. PMC 59220. PMID 11080298.

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