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ENZYME

ENZYME entry: EC 2.4.1.243

PURL: https://purl.expasy.org/enzyme/EC/2.4.1.243
Accepted Name
6(G)-fructosyltransferase
Alternative Name(s)
6(G)-FFT
6(G)-fructotransferase
6(G)-FT
fructan:fructan 6(G)-fructosyltransferase
Reaction catalysed
[1-beta-D-fructofuranosyl-(2->1)-]m+1 alpha-D-glucopyranoside + [1-beta-D-fructofuranosyl-(2->1)-]n+1 alpha-D-glucopyranoside = [1-beta-D-fructofuranosyl-(2->1)-]m alpha-D-glucopyranoside + [1-beta-D-fructofuranosyl-(2->1)-]n+1 beta-D-fructofuranosyl-(2->6)-alpha-D-glucopyranoside (m > 0, n >= 0)
Comment(s)
  • This enzyme catalyzes the transfer of the terminal (2->1)-linked beta-D-fructosyl group of a mono- or oligosaccharide substituent on O-1 of the fructose residue of sucrose onto O-6 of its glucose residue.
  • For example, if 1-kestose [1(F)-(beta-D-fructofuranosyl)sucrose] is both the donor and recipient in the reaction shown above, i.e., if m = 1 and n = 1, then the products will be sucrose and 6(G)-di-beta-D- fructofuranosylsucrose.
  • In this notation, the superscripts F and G are used to specify whether the fructose or glucose residue of the sucrose carries the substituent; alternatively, this may be indicated by the presence and/or absence of primes.
  • Sucrose cannot be a donor substrate in the reaction (i.e. m cannot be zero) and inulin cannot act as an acceptor.
  • Side reactions catalyzed are transfer of a beta-D-fructosyl group between compounds of the structure 1(F)-(1-beta-D- fructofuranosyl)m-6(G)-(1-beta-D-fructofuranosyl)n sucrose, where m >= 0 and n = 1 for the donor, and m >= 0 and n >= 0 for the acceptor.
Cross-references
BRENDA2.4.1.243
EC2PDB2.4.1.243
ExplorEnz2.4.1.243
KEGG Ligand Database for Enzyme Nomenclature2.4.1.243
IUBMB Enzyme Nomenclature2.4.1.243
MEDLINEFind literature relating to 2.4.1.243
MetaCyc2.4.1.243
Rhea expert-curated reactions2.4.1.243
UniProtKB/Swiss-Prot
P92916, GFT_ALLCEQ5FC15, GFT_ASPOF

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