What Is Starch Biosynthesis?

Starch synthase, which uses adenosine diphosphate glucose (ADPG) as the glucose donor, catalyzes the extension of -1,4-glucosidic bonds to glucose polymers through glycosyl transfer. An enzyme is essentially a transglycosylase. ^[1] In addition, ADPG is formed by the enzyme reaction of glucose-1-phosphate + ATP ADPG + ppi (glucose-1-phosphate adenylyltransferase (EC 2.7.7.27)).

Starch synthase

Granular amylase with ordinary starch tissue can increase

There are two kinds of granular and soluble combined with starch granules.

Japonica (20% amylose, 80% amylopectin) corn and rice synthase are granular. In waxy seeds (100% amylopectin), almost all of the activity is in the soluble part. Starch granules are considered to have little activity, and soluble and granular starch synthase is present in the chloroplasts of spinach. When this enzyme works, as a glucose receptor, a glucose polymer must be present. Soluble enzymes obtained from sweet corn seeds with high glycogen content in plants can only use amylopectin and glycogen as glucose receptors. Soluble enzymes in tobacco chloroplasts can accept any of amylopectin, glycogen, and heated starch granules as receptors. The soluble enzymes of potato tubers can only accept starch granules as receptors.