Mannans are polymers containing the sugar mannose as a principal component. They are a type of polysaccharide found in hemicellulose, a major source of biomass found in higher plants such as softwoods. These polymers also typically contain two other sugars, galactose and glucose. They are often branched.
Glucagon is a peptide hormone, produced by alpha cells of the pancreas. It raises the concentration of glucose and fatty acids in the bloodstream and is considered to be the main catabolic hormone of the body. It is also used as a medication to treat a number of health conditions. Its effect is opposite to that of insulin, which lowers extracellular glucose. It is produced from proglucagon, encoded by the GCG gene.
Glycogen phosphorylase is one of the phosphorylase enzymes. Glycogen phosphorylase catalyzes the rate-limiting step in glycogenolysis in animals by releasing glucose-1-phosphate from the terminal alpha-1,4-glycosidic bond. Glycogen phosphorylase is also studied as a model protein regulated by both reversible phosphorylation and allosteric effects.
The glucose cycle occurs primarily in the liver and is the dynamic balance between glucose and glucose 6-phosphate. This is important for maintaining a constant concentration of glucose in the blood stream.
Myophosphorylase or glycogen phosphorylase, muscle associated (PYGM) is the muscle isoform of the enzyme glycogen phosphorylase and is encoded by the PYGM gene. This enzyme helps break down glycogen into glucose-1-phosphate, so it can be used within the muscle cell. Mutations in this gene are associated with McArdle disease, a glycogen storage disease of muscle.
Sucrose phosphorylase is an important enzyme in the metabolism of sucrose and regulation of other metabolic intermediates. Sucrose phosphorylase is in the class of hexosyltransferases. More specifically it has been placed in the retaining glycoside hydrolases family although it catalyzes a transglycosidation rather than hydrolysis. Sucrose phosphorylase catalyzes the conversion of sucrose to D-fructose and α-D-glucose-1-phosphate. It has been shown in multiple experiments that the enzyme catalyzes this conversion by a double displacement mechanism.
In enzymology, a 1,3-beta-D-glucan phosphorylase is an enzyme that catalyzes the chemical reaction
In enzymology, a 1,3-beta-oligoglucan phosphorylase is an enzyme that catalyzes the chemical reaction
In enzymology, an alpha,alpha-trehalose phosphorylase is an enzyme that catalyzes the chemical reaction
In enzymology, an alpha,alpha-trehalose phosphorylase (configuration-retaining) is an enzyme that catalyzes the chemical reaction
In enzymology, a cellodextrin phosphorylase is an enzyme that catalyzes the chemical reaction
In enzymology, a dolichyl-phosphate beta-D-mannosyltransferase is an enzyme that catalyzes the chemical reaction
In enzymology, a kojibiose phosphorylase is an enzyme that catalyzes the chemical reaction
In enzymology, a laminaribiose phosphorylase is an enzyme that catalyzes the chemical reaction
In enzymology, a maltose phosphorylase is an enzyme that catalyzes the chemical reaction
Thymidine phosphorylase is an enzyme that is encoded by the TYMP gene and catalyzes the reaction:
In enzymology, a trehalose 6-phosphate phosphorylase is an enzyme that catalyzes the chemical reaction
Beta-D-galactosyl-(1->4)-L-rhamnose phosphorylase is an enzyme with systematic name beta-D-galactosyl-(1->4)-L-rhamnose:phosphate 1-alpha-D-galactosyltransferase. This enzyme catalyses the following chemical reaction
Nigerose phosphorylase is an enzyme with systematic name 3-O-alpha-D-glucopyranosyl-D-glucopyranose:phosphate beta-D-glucosyltransferase. This enzyme catalyses the following chemical reaction
3-O-alpha-D-glucosyl-L-rhamnose phosphorylase is an enzyme with systematic name 3-O-alpha-D-glucopyranosyl-L-rhamnopyranose:phosphate beta-D-glucosyltransferase. This enzyme catalyses the following chemical reaction
