2,1-fructan:2,1-fructan 1-fructosyltransferase

In enzymology, a 2,1-fructan:2,1-fructan 1-fructosyltransferase (EC 2.4.1.100) is an enzyme that catalyzes the chemical reaction

[beta-D-fructosyl-(2->1)-]m + [beta-D-fructosyl-(2->1)-]n [beta-D-fructosyl-(2->1)-]m-1 + [beta-D-fructosyl-(2->1)-]n⁺1

Thus, the two substrates of this enzyme are [[[beta-D-fructosyl-(2->1)-]m]] and [[[beta-D-fructosyl-(2->1)-]n]], whereas its two products are [[[beta-D-fructosyl-(2->1)-]m-1]] and [[[beta-D-fructosyl-(2->1)-]n+1]].

This enzyme belongs to the family of glycosyltransferases, specifically the hexosyltransferases. The systematic name of this enzyme class is 2,1-beta-D-fructan:2,1-beta-D-fructan 1-beta-D-fructosyltransferase. Other names in common use include 1,2-beta-D-fructan 1F-fructosyltransferase, fructan:fructan fructosyl transferase, FFT, 1,2-beta-fructan 1F-fructosyltransferase, 1,2-beta-D-fructan:1,2-beta-D-fructan, 1F-beta-D-fructosyltransferase, and fructan:fructan 1-fructosyl transferase.

References

IUBMB entry for 2.4.1.100
BRENDA references for 2.4.1.100 (Recommended.)
PubMed references for 2.4.1.100
PubMed Central references for 2.4.1.100
Google Scholar references for 2.4.1.100
Henry RJ and Darbyshire B (1980). "Sucrose:sucrose fructosyltransferase and fructan:fructan fructosyltransferase from Allium cepa". Phytochemistry 19: 1017–1020. doi:10.1016/0031-9422(80)83050-0.
Vergauwen R, Van Laere A, Van den Ende W (2003). "Properties of fructan:fructan 1-fructosyltransferases from chicory and globe thistle, two Asteracean plants storing greatly different types of inulin". Plant. Physiol. 133: 391–401. doi:10.1104/pp.103.026807. PMID 12970504.