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Invertase is a glycoprotein that hydrolyses (cleaves) the non-reducing terminal β-fructofuranoside residues. Invertases cleave the O-C(fructose) bond, whereas the sucrases cleave the O-C(glucose) bond. [3] Invertase cleaves the α-1,2-glycosidic bond of sucrose. For industrial use, invertase is usually derived from yeast.
Sucrose is a non-reducing sugar, so will not test positive with Benedict's solution. To test for sucrose, the sample is treated with sucrase. To test for sucrose, the sample is treated with sucrase. The sucrose is hydrolysed into glucose and fructose , with glucose being a reducing sugar , which in turn tests positive with Benedict's solution.
This enzyme is isolated from intestinal mucosa as a single polypeptide chain. The human sucrase-isomaltase is a dual-function enzyme with two GH31 domains, one serving as the isomaltase , the other serving as a sucrose α-glucosidase .
The best-known disaccharide is sucrose (table sugar). Hydrolysis of sucrose yields glucose and fructose. Invertase is a sucrase used industrially for the hydrolysis of sucrose to so-called invert sugar. Lactase is essential for digestive hydrolysis of lactose in milk; many adult humans do not produce lactase and cannot digest the lactose in milk.
In this sense, "alpha-glucosidase" can encompass a wide range of enzyme activitiess, differing by the linkage of their terminal (1→3, 1→4, or 1→6), the specific identity of their substrate (sucrose, maltose, or starch), among other aspects.
In bacteria and some animals, sucrose is digested by the enzyme invertase. Sucrose is an easily assimilated macronutrient that provides a quick source of energy, provoking a rapid rise in blood glucose upon ingestion. Sucrose, as a pure carbohydrate, has an energy content of 3.94 kilocalories per gram (or 17 kilojoules per gram).
These enzymes have a variety of uses including degradation of plant materials (e.g., cellulases for degrading cellulose to glucose, which can be used for ethanol production), in the food industry (invertase for manufacture of invert sugar, amylase for production of maltodextrins), and in the paper and pulp industry (xylanases for removing ...
69983 Ensembl ENSG00000090402 ENSMUSG00000027790 UniProt P14410 F8VQM5 RefSeq (mRNA) NM_001041 NM_001081137 RefSeq (protein) NP_001032 NP_001074606 Location (UCSC) Chr 3: 164.98 – 165.08 Mb Chr 3: 72.8 – 72.88 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Sucrase-isomaltase is a bifunctional glucosidase (sugar-digesting enzyme) located on the brush border of the small intestine ...