Evolution and origins of rubisco

Area of Science:

• Biochemistry
• Molecular Biology
• Evolutionary Biology

Background:

• Rubisco (D-ribulose 1,5-bisphosphate carboxylase/oxygenase) is the most abundant enzyme globally, vital for converting CO2 into sugars and underpinning the biosphere.
• Despite its central role in the carbon cycle, Rubisco is inefficient due to slow carboxylation and competing oxygenase activity.
• Improving Rubisco's CO2 fixation efficiency holds potential for agriculture and climate change mitigation, but engineering efforts have been challenging.

Purpose of the Study:

• To investigate the evolutionary trajectory of Rubisco to understand its origins.
• To elucidate the relationship between Rubisco's structure and function through evolutionary studies.
• To identify potential avenues for engineering improved CO2 fixation capabilities.

Main Methods:

• Reconstruction of Rubisco's evolutionary history.
• Analysis of Rubisco's structure-function relationships across evolutionary time.
• Comparative studies of different Rubisco forms and their catalytic properties.

Main Results:

• Evolutionary studies have provided a better understanding of the origins of complex Rubisco forms.
• Insights gained into the relationship between Rubisco's structure and its biochemical function.
• Identification of key evolutionary steps and potential targets for enzyme improvement.

Conclusions:

• Understanding Rubisco's evolutionary past is key to overcoming engineering challenges.
• Evolutionary reconstruction offers a powerful approach to deciphering enzyme function and improving catalytic efficiency.
• Further research into Rubisco evolution could lead to significant advancements in carbon capture and crop productivity.