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A Completely De Novo ATPase from Combinatorial Protein Design
Michael S Wang1, Michael H Hecht1
1Department of Chemistry, Princeton University, Princeton, New Jersey 08540, United States.
Journal of the American Chemical Society
|August 25, 2020
Summary
Researchers designed a novel enzyme from scratch that breaks down ATP, unlike natural enzymes. This engineered protein lacks beta-sheet structure and is inhibited by magnesium, expanding biochemical possibilities.
Area of Science:
- Biochemistry
- Synthetic Biology
- Protein Engineering
Background:
- Life originates from pre-existing life (omne vivum ex vivo).
- Recreating biological catalysis with non-natural sequences is crucial for expanding biochemical understanding.
- Natural ATPases are essential enzymes involved in energy metabolism.
Purpose of the Study:
- To design and characterize a completely de novo enzyme.
- To create an enzyme that hydrolyzes ATP (adenosine triphosphate).
- To engineer a protein with non-natural characteristics, distinct from common ancestry.
Main Methods:
- De novo protein design computational methods.
- In vitro biochemical assays to test enzyme activity.
- Enzyme kinetics studies to determine inhibition mechanisms.
Main Results:
- Successfully designed and synthesized a novel protein lacking beta-sheet structure.
- Demonstrated that the designed enzyme hydrolyzes ATP.
- Observed competitive inhibition by magnesium, a unique trait compared to natural ATPases.
Conclusions:
- It is possible to design functional enzymes de novo with non-natural structural and regulatory properties.
- This engineered ATPase expands the scope of synthetic biology and enzyme engineering.
- The designed enzyme offers a new tool for studying ATP hydrolysis and enzyme mechanisms.
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