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β-1,3-glucanase
Glucanases are enzymes that break down large polysaccharides via hydrolysis. The product of the hydrolysis reaction is called a glucan, a linear polysaccharide made of up to 1200 glucose monomers, held together with glycosidic bonds. Glucans are abundant in the endosperm cell walls of cereals such as barley, rye, sorghum, rice, and wheat. Glucanases are also referred to as lichenases, hydrolases, glycosidases, glycosyl hydrolases, and/or laminarinases. Many types of glucanases share similar amino acid sequences but vastly different substrates. Of the known endo-glucanases, 1,3-1,4-β-glucanase is considered the most active. Structure β-glucanases The secondary and tertiary structures of β-glucanases involves the stacking of multiple β-sheets, each of which are made of several anti-parallel strands that bend and form a cleft crossing the active site of the enzyme. This type of structure has been called the "jelly roll fold." Some common β-glucanases * 1,3-β-glucanas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endo-1,3(4)-b-glucanase
Endo-1,3(4)-β-glucanase (EC 3.2.1.6, endo-1,3-β-D-glucanase, laminarinase, β-1,3-glucanase,4-glucanase, endo-β-(1→3)-D-glucanase, endo-1,3-1,4-β-D-glucanase, endo-β-(1-3)-D-glucanase, endo-β-1,3-glucanase IV, 1,3-1,4)-β-D-glucan 3(4)-glucanohydrolase) is an enzyme with systematic name 3(or 4)-β-D-glucan 3(4)-glucanohydrolase. It catalyses the following chemical reaction : Endohydrolysis of (1→3)- or (1→4)-linkages in β-D-glucans when the glucose residue whose reducing group is involved in the linkage to be hydrolysed is itself substituted at C-3 Substrates include laminarin, lichenin Lichenin, also known as lichenan or moss starch, is a complex glucan occurring in certain species of lichens. It can be extracted from ''Cetraria islandica'' (Iceland moss). It has been studied since about 1957. Structure Chemically, lichenin i ... and cereal D- glucans. References External links * {{Portal bar, Biology, border=no EC 3.2.1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
