1 research outputs found
Thermal Cycling Cascade Biocatalysis of <i>myo</i>-Inositol Synthesis from Sucrose
<i>myo</i>-Inositol belongs to the vitamin B group (vitamin
B8) and is widely used in the drug, cosmetic, and food and feed industries.
It is produced by acid hydrolysis of phytate, but this method suffers
from costly feedstock and serious phosphorus pollution. Here a four-enzyme
pathway containing thermophilic sucrose phosphorylase, phosphoglucomutase,
inositol 1-phosphate synthase, and inositol monophosphatase was designed
to convert sucrose to inositol and fructose. To enable the use of
enzymes with different optimal temperatures and thermostabilities,
we developed a thermal cycling cascade biocatalysis that can selectively
add less-thermostable sucrose phosphorylase immobilized on cellulose-containing
magnetic nanoparticles into the cold enzyme cocktail or remove it
from the hot enzyme cocktail by using a magnetic field (ON/OFF) switch.
A series of exergonic reactions push the overall reaction forward,
resulting in a high product molar yield (0.98 mol of inositol/mol
of sucrose). This cascade biocatalysis platform could open a door
to the large-scale production of less-costly inositol and upgrade
sucrose to a value-added nutraceutical and functional sweetener