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Manipulation of Rubisco: the amount, activity, function and regulation
M A J Parry1, P J Andralojc, R A C Mitchell
1Crop Performance and Improvement, Rothamsted Research, Harpenden, Hertfordshire AL5 2JQ, UK. martin.parry@bbsrc.ac.uk
Journal of Experimental Botany
|April 24, 2003
Summary
Enhancing Rubisco
Area of Science:
- Plant biochemistry and molecular biology
- Enzyme engineering for crop improvement
Background:
- Ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) is a key enzyme in photosynthesis.
- Improving Rubisco's specificity for carbon dioxide (CO2) over oxygen (O2) and its catalytic rate is crucial for crop yields.
Purpose of the Study:
- To explore strategies for genetically modifying Rubisco to enhance its catalytic efficiency and CO2 specificity in crop plants.
- To address the challenges in assembling functional Rubisco holoenzymes in vivo.
Main Methods:
- Utilizing atomic resolution 3D structures and site-directed mutants to understand Rubisco's catalytic mechanism.
- Identifying natural variations in Rubisco properties across species.
- Developing tools for introducing novel and foreign Rubisco genes into plants.
- Employing antisense constructs to study the impact of Rubisco quantity.
- Manipulating Rubisco activase genes to investigate activity regulation.
Main Results:
- Significant progress in understanding Rubisco's catalytic mechanism and identifying natural variations.
- Development of tools for genetic manipulation of Rubisco in plants.
- Challenges remain in the in vivo assembly of functional Rubisco holoenzymes.
Conclusions:
- Genetic modification of Rubisco holds great agronomic potential for increasing crop productivity.
- Further research is needed to overcome the complexities of Rubisco assembly and regulation in vivo.