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Developing Isomeric Peptides for Mimicking the Sequence-Activity Landscapes of Enzyme Evolution
Yaling Wang1, Tiezheng Pan2, Jie Li1
1State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Bioactive Materials of Ministry of Education and College of Life Sciences, Nankai University, Tianjin 300071, China.
ACS Applied Materials & Interfaces
|April 22, 2024
Summary
Researchers explored how changing the order of amino acids in short peptides affects their self-assembly and catalytic abilities. This work sheds light on enzyme evolution and the creation of new biomaterials.
Area of Science:
- Biomaterials Science
- Biochemistry
- Supramolecular Chemistry
Background:
- Enzymes are crucial biological catalysts, but their natural evolutionary pathways are not well understood.
- Short peptides with active sites are being explored for self-assembled biomaterials that mimic proteins.
Purpose of the Study:
- To investigate the sequence-activity landscape of enzyme evolution using histidine-containing tetrapeptides.
- To understand how peptide sequence variations influence self-assembly and catalytic activity.
- To correlate peptide structure with catalytic function in self-assembled nanostructures.
Main Methods:
- Synthesized and studied six isomeric tetrapeptides containing histidine (His) and phenylalanine (Phe) residues.
- Investigated self-assembly behavior and characterized resulting nanostructures (nanofibers, nanospheres, nanodiscs).
- Assessed catalytic activity as hydrolytic simulation enzymes and analyzed structure-activity relationships.
Main Results:
- Peptide sequence significantly impacts self-assembly, driven by hydrogen bonding and aromatic interactions, leading to diverse morphologies.
- The distribution and accessibility of the His active site within nanostructures are critical for catalytic microenvironment formation.
- A strong correlation exists between peptide sequence, nanostructure formation, and simulated hydrolytic enzyme activity.
Conclusions:
- Peptide sequence dictates self-assembly and catalytic function, mirroring evolutionary strategies in natural enzymes.
- This study provides insights into how primary structure variations enhance enzyme catalytic activity.
- Findings support the development of novel bioactive supramolecular materials and fundamental research in enzyme evolution.
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