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Related Concept Videos

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Because the DNA segments are cut and reorganized in a direction-specific manner, site-specific recombination has emerged as an efficient genetic engineering technique. Flippase and Cyclization recombinases or Flp and Cre, respectively, are two members of the tyrosine recombinase family derived from bacteriophages, that are used to mediate site-specific DNA insertions, deletions, and targeted expression of proteins in mammalian cell lines.
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Related Experiment Video

Updated: Dec 15, 2025

Optimizing the Genetic Incorporation of Chemical Probes into GPCRs for Photo-crosslinking Mapping and Bioorthogonal Chemistry in Live Mammalian Cells
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Genetically encoded selective cross-linkers and emerging applications.

Haiyan Ren1

  • 1Division of Respiratory and Critical Care Medicine, West China Hospital of Sichuan University, Chengdu 610041, China.

Biochemical Society Transactions
|July 14, 2020
PubMed
Summary
This summary is machine-generated.

Genetically encoded cross-linkers using unnatural amino acids offer precise protein engineering. These tools enhance stability, interactions, and have potential in biotherapy and biomolecular medicines.

Keywords:
genetical code expasionprotein–protein interactionsresidue-selective crosslinkersunnatural amino acids

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Protein Engineering

Background:

  • Genetically encoded cross-linkers are of significant interest for targeting cellular functional groups.
  • Unnatural amino acids have been developed for specific reactions with target residues.
  • These methods offer improved cross-linking efficiency, reduced background, and predictable site-specificity.

Purpose of the Study:

  • To introduce and highlight the utility of genetically incorporated unnatural amino acids for targeted protein cross-linking.
  • To showcase the advantages of these novel cross-linking strategies over traditional methods.
  • To explore the diverse applications of these covalent linkages in biological research and biotherapy.

Main Methods:

  • Genetic incorporation of unnatural amino acids with specific reactive properties.
  • Utilizing selective chemical ligation for cross-linking within cellular environments.
  • Application of these engineered proteins in various biological assays and therapeutic strategies.

Main Results:

  • Demonstrated higher cross-linking efficiency and lower background signal compared to existing methods.
  • Achieved predictable and specific cross-linking sites, enabling precise molecular mapping.
  • Successfully applied in enhancing protein stability, identifying protein-protein interactions, and stabilizing protein complexes.

Conclusions:

  • Genetically encoded unnatural amino acids represent powerful tools for advanced protein engineering.
  • These covalent linkages offer significant opportunities for innovation in biological studies and biomolecular medicines.
  • The precise control over cross-linking facilitates deeper understanding of cellular mechanisms and therapeutic development.