Phosphorylation of aldose-6-phosphate reductase from Prunus persica leaves.

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ID: 276043
2022
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Ranked #49 of 513 articles by views in Plant physiology and biochemistry : PPB

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Abstract
Sugar-alcohols are major photosynthates in plants from the Rosaceae family. Expression of the gene encoding aldose-6-phosphate reductase (Ald6PRase), the critical enzyme for glucitol synthesis in rosaceous species, is regulated by physiological and environmental cues. Additionally, Ald6PRase is inhibited by small molecules (hexose-phosphates and inorganic orthophosphate) and oxidizing compounds. This work demonstrates that Ald6PRase from peach leaves is phosphorylated in planta at the N-terminus. We also show in vitro phosphorylation of recombinant Ald6PRase by a partially purified kinase extract from peach leaves containing Ca-dependent protein kinases (CDPKs). Moreover, phosphorylation of recombinant Ald6PRase was inhibited by hexose-phosphates, phosphoenolpyruvate and pyrophosphate. We further show that phosphorylation of recombinant Ald6PRase was maximal using recombinant CDPKs. Overall, our results suggest that phosphorylation could fine-tune the activity of Ald6PRase.
Reference Key
hartman2022phosphorylationplant Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Hartman, Matías D;Rojas, Bruno E;Ferrero, Danisa M L;Leyva, Alejandro;Durán, Rosario;Iglesias, Alberto A;Figueroa, Carlos M;
Journal Plant physiology and biochemistry : PPB
Year 2022
DOI
10.1016/j.plaphy.2022.12.003
URL
Keywords
phosphorylation sorbitol cdpk glucitol sos2 snrk

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