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Related Concept Videos

Peptide Bonds02:43

Peptide Bonds

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A peptide bond covalently attaches amino acids through a dehydration reaction. One amino acid's carboxyl group and another amino acid's amino group combine, releasing a water molecule. The resulting bond is the peptide bond. The products that such linkages form are peptides. As more amino acids join this growing chain, the resulting chain is a polypeptide. Each polypeptide has a free amino group at one end. This end has the N-terminal, or the amino-terminal, and the other end has a free...
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A covalent crosslinking strategy to construct a robust peptide-based artificial esterase.

Yi Tian1, Lijun Yang1, Xin Peng2

  • 1School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin 300350, P. R. China. mwang@tju.edu.cn.

Soft Matter
|May 2, 2023
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Summary
This summary is machine-generated.

Researchers developed a robust peptide-based artificial esterase using covalent crosslinking. This new artificial enzyme exhibits enhanced stability and catalytic activity, overcoming limitations of previous noncovalent designs.

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Area of Science:

  • Biochemistry
  • Materials Science
  • Catalysis

Background:

  • Peptide-based artificial enzymes offer promising catalytic functions.
  • Current limitations include poor stability due to noncovalent structures sensitive to environmental conditions.

Purpose of the Study:

  • To develop a robust peptide-based artificial esterase with improved stability and catalytic activity.
  • To explore a covalent crosslinking strategy for peptide-based artificial enzyme fabrication.

Main Methods:

  • Designed a peptide sequence (YYHYY) incorporating multi-tyrosines and a histidine catalytic residue.
  • Utilized photo-induced oxidation to form covalent di-tyrosine bonds, leading to nanoparticle aggregates (CL-YYHYY).

Main Results:

  • The covalent crosslinking strategy successfully fabricated stable nanoparticle-shaped artificial esterase aggregates (CL-YYHYY).
  • CL-YYHYY demonstrated enhanced esterase-like catalytic activity compared to noncovalent counterparts.
  • Achieved outstanding reusability and superior stability under harsh conditions (high temperature, extreme pH, organic solvents).

Conclusions:

  • Covalent crosslinking is an effective strategy to enhance the stability and catalytic performance of peptide-based artificial enzymes.
  • The developed CL-YYHYY presents a robust and reusable artificial esterase with significant potential for various applications.