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DNA-Encoded Noncanonical Substrate Library for Protease Profiling.

Huiya Zhang1,2, Yuyu Xing1,2, Yixuan Yang3

  • 1Biotech Drug Research Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China.

Chembiochem : a European Journal of Chemical Biology
|September 19, 2024
PubMed
Summary
This summary is machine-generated.

This study introduces a rapid method to identify protease substrates using DNA-encoded libraries, enabling the discovery of noncanonical substrates for enzyme inhibitor design.

Keywords:
Combinatorial peptide libraryCovalent inhibitorDNA-encoded libraryHigh-throughput screeningNoncanonical peptideProtease substrate

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Area of Science:

  • Biochemistry and Molecular Biology
  • Protease Function and Inhibition

Background:

  • Understanding protease substrate specificity is crucial for biological insights and therapeutic development.
  • Existing methods lack high-throughput capabilities for profiling noncanonical protease substrates.

Purpose of the Study:

  • To develop a rapid, high-throughput strategy for identifying protease substrates with noncanonical amino acids.
  • To discover novel substrates for trypsin and fibroblast activation protein α (FAP).

Main Methods:

  • Utilized a DNA-encoded peptide library with N-terminal biotin for immobilization.
  • Employed protease hydrolysis to release DNA tags, which were then sequenced to determine substrate structures.
  • Applied the method to profile trypsin and FAP.

Main Results:

  • Identified novel noncanonical substrates for trypsin and FAP, some cleaved more efficiently than standard substrates.
  • Designed potent covalent inhibitors for FAP based on the identified noncanonical substrates.

Conclusions:

  • The DNA-encoded library approach provides a powerful tool for profiling protease specificity with noncanonical substrates.
  • This strategy facilitates the development of new protease substrates and highly potent protease inhibitors.