A class of hydrolytic enzymes that act on glycosides; α-glycosidases act on α-glycosidic linkages (for example, α-amylase) whereas β-glycosidases act on β-glycosidic linkages (for example, β-glucosidase). They can be further divided into those enzymes that act on O-glycosyl, N-glycosyl, or S-glycosyl compounds.
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Glycosidases show perfect selectivity in transglycosylation reactions, giving rise to only one isomer because the formation of undesired isomer becomes impossible due to the steric hindrance caused by the wall of amino acid residues in the active site of enzyme (Fig.
Lactobacilli are able to produce polysaccharide depolymerases and glycosidases, which can improve the digestibility of nutrients by degrading the structural polysaccharide in plant cell wall [30].
The post-infection increase in phenolic content could be due to a number of factors including enhancement of synthesis, translocation of phenolics to the site of infection and hydrolysis of phenolic glycosides by fungal glycosidases to yield free phenols and the increase in level of phenolic compounds in infected leaves may be due to translocation of phenolics to the site of infection (Parashar et al, 1987 and Jabeen, et al.
Non-saccharomyces strains produce different acids and more enzymes (esterases, glycosidases, (Tglucosidases, proteases, etc.
Firmness decreases in banana pulp tissues are, normally, triggered by enzyme activity upon starch contents and on cell walls (CHITARRA; CHITARRA, 2005), such as amylases, phosphorilases and glycosidases ((BASSINELO et al.
Glycosidases of the rumen anaerobic fungus Neocallimastix frontalis grown on cellulosic substrates.
While the excessive activities of proteolytic enzymes and glycosidases seem to play the biggest role in aggrecan degradation, reactive oxygen species (ROS) attack is also an important degradative agent [3, 6, 7].
The phagolysosome in the phagocytes of coelomate animals contains a variety of hydrolases, including phosphatases (alkaline and acid), lipases and esterases with varying substrate specificity, and an array of substrate-specific glycosidases (reviewed in: Borregard et al.
Effects of abiotic factors (temperature, pH, heavy metals) on activities of glycosidases in invertebrate animals.
During an acute-phase response, not only are concentrations of serum acute-phase glycoproteins altered, but their glycan structures are also dynamically modified by circulating glycosidases and glycosyltransferases (5, 6).
Glycoprotein degradation in the blind loop syndrome: identification of glycosidases in jejunal contents.
15] Yeboua A, Achy N and K Diopoh Hydrolyse des substrats amylaces par les glycosidases du sucre digestif d'Achatina balteata.