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The rice endosperm ADP-glucose pyrophosphorylase large subunit is essential for optimal catalysis and allosteric regulation of the heterotetrameric enzyme.

Plant & cell physiology - 1 Jun 2014

Tuncel Aytug, Kawaguchi Joe, Ihara Yasuharu, Matsusaka Hiroaki, Nishi Aiko, Nakamura Tetsuhiro, Kuhara Satoru, Hirakawa Hideki, Nakamura Yasunori, Cakir Bilal, Nagamine Ai, Okita Thomas W, Hwang Seon-Kap, Satoh Hikaru

Abstract excerpt

Although an alternative pathway has been suggested, the prevailing view is that starch synthesis in cereal endosperm is controlled by the activity of the cytosolic isoform of ADPglucose pyrophosphorylase (AGPase). In rice, the cytosolic AGPase isoform is encoded by the OsAGPS2b and OsAGPL2 genes, which code for the small (S2b) and large (L2) subunits of the heterotetrameric enzyme, respectively. In this study, we...

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PMID: 24747952
DOI: 10.1093/pcp/pcu057

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