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Related Experiment Videos

Engineering an affinity tag for genetically encoded cyclic peptides.

Todd A Naumann1, Sergey N Savinov, Stephen J Benkovic

  • 1Department of Chemistry, The Pennsylvania State University, 414 Wartik Laboratory, University Park, PA 16802, USA.

Biotechnology and Bioengineering
|September 13, 2005
PubMed
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This study introduces a novel cyclic peptide library using a streptavidin-binding tag (HPQ). This technology enables efficient peptide expression, purification, and analysis for biological and medicinal applications.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Synthetic Biology

Background:

  • Peptide expression libraries are crucial tools for investigating cellular functions.
  • SICLOPPS technology combines genetic and small-molecule methods for large, stable peptide libraries.
  • Cyclic peptides offer unique structural and functional properties.

Purpose of the Study:

  • To develop and implement an expressed affinity tag for a cyclic peptide library.
  • To create a streptavidin-binding motif compatible with backbone cyclization.
  • To establish a system for sensitive detection and purification of cyclic peptides.

Main Methods:

  • Development of a cyclic peptide library using SICLOPPS technology.
  • Incorporation of a tripeptide streptavidin-binding motif (His-Pro-Gln).

Related Experiment Videos

  • Utilizing streptavidin for peptide detection, purification, and analysis of intein mutants.

    • Main Results:

    • Successful presentation of the HPQ tag on a backbone cyclized template.
    • The HPQ tag served as an effective indicator for peptide splicing, expression, and recovery.
    • One-step purification of cyclic peptides was achieved using streptavidin affinity.
    • The tag facilitated analysis of intein mutants through specific streptavidin recognition.

    Conclusions:

    • The developed affinity tag is a valuable tool for cyclic peptide library applications.
    • This technology enhances the study of peptide splicing and protein interactions.
    • The system provides a robust platform for designing novel streptavidin-responsive cyclic peptides.