Article
The phosphoglucan phosphatase like sex Four2 dephosphorylates starch at the C3-position in Arabidopsis.
The Plant cell - 1 Nov 2011
Santelia Diana, Kötting Oliver, Seung David, Schubert Mario, Thalmann Matthias, Bischof Sylvain, Meekins David A, Lutz Andy, Patron Nicola, Gentry Matthew S, Allain Frédéric H-T, Zeeman Samuel C
Abstract excerpt
Starch contains phosphate covalently bound to the C6-position (70 to 80% of total bound phosphate) and the C3-position (20 to 30%) of the glucosyl residues of the amylopectin fraction. In plants, the transient phosphorylation of starch renders the granule surface more accessible to glucan hydrolyzing enzymes and is required for proper starch degradation. Phosphate also confers desired properties to starch-derived...
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