| 别名 |
6(G)-fructosyltransferase/2,1-fructan:2,1-fructan 1-fructosyltransferase, 6G-FFT, 6G-FFT/1-FFT, 6G-FFT1, 6G-FFT2, AoFT1, Atq6G-FFT-1, Atq6G-FFT-2, fructan-fructan 6G-fructosyltransferase, fructan: fructan 6G-fructosyltransferase, fructan:fructan 6G-fructosyltransferase, fructan:fructan 6G-fructosyltransferase/fructan:fructan 1-fructosyltransferase |
| Comments |
This enzyme catalyses the transfer of the terminal (2¡ú1)-linked ¦Â-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 [1]. For example, if 1-kestose [1F-(¦Â-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 6G-di-¦Â-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 (see 2-Carb-36.2). Sucrose cannot be a donor substrate in the reaction (i.e. m cannot be zero) and inulin cannot act as an acceptor. Side reactions catalysed are transfer of a ¦Â-D-fructosyl group between compounds of the structure 1F-(1-¦Â-D-fructofuranosyl)m-6G-(1-¦Â-D-fructofuranosyl)n sucrose, where m ¡Ý 0 and n = 1 for the donor, and m ¡Ý 0 and n ¡Ý 0 for the acceptor. |
