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Keyword Starch biosynthesis

Definition

Protein involved in the synthesis of starch, the carbohydrate storage of plants. Starch consists of amylose (a linear alpha(1-4)-glucan) and amylopectin (an alpha(1-4)-glucan with alpha(1-6)-branch points). Starch (glucans and amylopectins) is synthesised via the ADP-glucose pathway by three key enzymes: ADP-glucose pyrophosphorylase, starch synthases and starch branching enzymes. The randomly branched glucan molecules are then specifically debranched via a debranching enzyme in order to produce amylopectins. Amylopectins are branched in highly ordered clusters and are crystalline in nature, but also contain covalently bound phosphate.

Category

Biological process

GOi

starch biosynthetic process [ GO:0019252 ]

Graphical

Starch biosynthesisBiological process