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

1,2-beta-fructan 1F-fructosyltransferase
Identifiers
EC number	2.4.1.100
CAS number	73379-55-2
Databases
IntEnz	IntEnz view
BRENDA	BRENDA entry
ExPASy	NiceZyme view
KEGG	KEGG entry
MetaCyc	metabolic pathway
PRIAM	profile
PDB structures	RCSB PDB PDBe PDBsum
Gene Ontology	AmiGO / EGO
Search PMC articles PubMed articles NCBI proteins

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 $\rightleftharpoons$ [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

• Henry RJ and 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.
• 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 (1): 391–401. doi:10.1104/pp.103.026807. PMC 196615. PMID 12970504.