Structural insights into dioxygen-activating copper enzymes
Amy C Rosenzweig1, Matthew H Sazinsky
1Department of Biochemistry, Northwestern University, Evanston, IL 60208, USA. amyr@northwestern.edu
Current Opinion in Structural Biology
|October 3, 2006
Summary
Copper enzymes utilize oxygen for vital biological functions. Protein structures reveal how copper centers bind and activate oxygen, influencing enzyme activity and substrate specificity.
Area of Science:
- Biochemistry
- Structural Biology
- Enzymology
Background:
- Copper-containing enzymes are crucial for numerous biological processes involving oxygen.
- These enzymes feature mononuclear, dinuclear, and trinuclear copper centers responsible for oxygen binding, activation, and substrate oxidation.
Purpose of the Study:
- To review recent advances in the structural biology of oxygen-activating copper enzymes.
- To highlight the role of protein scaffolds in determining enzyme function.
Main Methods:
- Structural biology techniques were employed to elucidate enzyme structures.
- Analysis of novel copper centers and known enzyme structures.
Main Results:
- Advances include identifying new copper centers, like in particulate methane monooxygenase.
- Detailed structures of peptidylglycine alpha-hydroxylating monooxygenase illuminate oxygen binding and reactivity.
- Structures of phenoxazinone synthase, Fet3, and tyrosinase offer insights into multicopper oxidases and substrate specificity.
Conclusions:
- The protein scaffold is a critical determinant of function in oxygen-activating copper enzymes.
- Structural insights continue to advance our understanding of copper enzyme mechanisms and specificity.
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