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Updated: Sep 20, 2025

OaAEP1-Mediated Enzymatic Synthesis and Immobilization of Polymerized Protein for Single-Molecule Force Spectroscopy
Published on: February 5, 2020
Traceless enzymatic protein synthesis without ligation sites constraint
Ruifeng Li1, Marcel Schmidt2, Tong Zhu1
1CAS Key Laboratory of Microbial Physiological and Metabolic Engineering, State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China.
A new platform called protein activation and ligation with multiple enzymes (PALME) enables traceless synthesis and modification of biomacromolecules. This versatile method overcomes previous limitations, facilitating the creation of complex pharmaceutical ingredients and proteins.
Area of Science:
- Biochemistry
- Synthetic Biology
- Chemical Biology
Background:
- Protein synthesis and semisynthesis are crucial for life sciences and pharmaceutical development.
- A key limitation is the lack of a universally applicable method for traceless peptide conjugation at various sites.
Purpose of the Study:
- To introduce a novel platform for sequence-unconstrained synthesis and modification of biomacromolecules.
- To overcome the bottleneck in traceless peptide conjugation for accessing synthetic targets.
Main Methods:
- Development of the protein activation and ligation with multiple enzymes (PALME) platform.
- Utilizing upstream activating modules for processing synthetic peptides and recombinant proteins.
- Employing a downstream coupling module for peptide condensation, cyclization, and protein functionalization.
Main Results:
- Demonstrated synthesis of diverse bioactive targets, including pharmaceutical ingredients and complex proteins.
- The PALME platform allows for sequence-unconstrained synthesis and modification.
- Successful application in N/C-terminal and internal protein functionalization.
Conclusions:
- The PALME platform offers broad accessibility for traceless protein synthesis and functionalization.
- This modular approach significantly advances protein chemistry and synthetic biology.
- Enables the creation of challenging synthetic targets with unprecedented ease.
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