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Structure, function, and evolution of plant ADP-glucose pyrophosphorylase
Carlos M Figueroa1, Matías D Asencion Diez1, Miguel A Ballicora2
1Instituto de Agrobiotecnología del Litoral, Universidad Nacional del Litoral, Consejo Nacional de Investigaciones Científicas y Técnicas, Facultad de Bioquímica y Ciencias Biológicas, Santa Fe, Argentina.
Plant Molecular Biology
|January 10, 2022
Summary
ADP-glucose pyrophosphorylase (ADP-Glc PPase) is key to starch synthesis. Research over two decades reveals its structure, regulation, and evolution, offering insights for crop improvement.
Area of Science:
- Biochemistry
- Plant Science
- Molecular Biology
Background:
- ADP-glucose pyrophosphorylase (ADP-Glc PPase) catalyzes the initial committed step in starch and glycogen biosynthesis.
- Plant ADP-Glc PPase is a heterotetramer regulated by allosteric metabolites and post-translational modifications.
Purpose of the Study:
- To review research on the structural, kinetic, regulatory, and evolutionary aspects of ADP-Glc PPase over the past two decades.
- To elucidate the mechanisms of allosteric regulation and signal transduction in plant ADP-Glc PPase.
- To explore the evolutionary history and post-translational modifications of ADP-Glc PPase.
Main Methods:
- Structural analysis of the plant enzyme.
- Identification of amino acids involved in regulatory molecule binding and allosteric signal transmission.
- Comparative analysis of ADP-Glc PPase subunits and their evolutionary relationships.
- Review of post-translational modifications and subcellular localization studies.
Main Results:
- Detailed understanding of the three-dimensional structure of plant ADP-Glc PPase.
- Identification of key residues and regions mediating allosteric control.
- A proposed model for the evolution of ADP-Glc PPase subunits.
- Insights into diverse post-translational modifications and tissue-specific localization.
Conclusions:
- Comprehensive review of ADP-Glc PPase regulation, structure, and evolution.
- Potential for rational modification of ADP-Glc PPase to enhance crop yield and resilience.
- Relevance of this research for addressing global food security and climate change challenges.
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