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Related Experiment Videos

Proximity-Based Sortase-Mediated Ligation.

Hejia Henry Wang1, Burcin Altun2, Kido Nwe2

  • 1Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA.

Angewandte Chemie (International Ed. in English)
|April 5, 2017
PubMed
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We developed proximity-based sortase-mediated ligation (PBSL) to enhance protein labeling. This method uses SpyTag-SpyCatcher to achieve over 95% ligation efficiency, simplifying protein purification and labeling.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Protein Engineering

Background:

  • Protein bioconjugation is vital for biological research and therapeutics.
  • Sortase A (SrtA) enables site-specific protein labeling but suffers from slow kinetics.
  • Existing methods face limitations in efficiency and purification complexity.

Purpose of the Study:

  • To develop an efficient and simplified method for site-specific protein labeling.
  • To overcome the poor reaction kinetics of Sortase A (SrtA).
  • To enhance protein ligation efficiency using a proximity-based approach.

Main Methods:

  • Developed proximity-based sortase-mediated ligation (PBSL).
  • Utilized the SpyTag-SpyCatcher peptide-protein pair to link target protein to SrtA.
Keywords:
bioconjugationexpressed protein ligationprotein engineeringprotein modificationssortase

Related Experiment Videos

  • Expressed target protein with SpyTag C-terminally to the SrtA recognition motif.
  • Employed immobilized SpyCatcher-SrtA fusion protein for capture and purification.

    • Main Results:

    • Achieved over 95% ligation efficiency.
    • Demonstrated a simplified, single-step process for protein purification and labeling.
    • Ensured traceless labeling through SpyTag cleavage post-ligation.

    Conclusions:

    • PBSL significantly enhances Sortase A-mediated protein ligation efficiency.
    • The developed method simplifies protein labeling and purification, making it more accessible.
    • This technique offers a robust platform for protein bioconjugation in various applications.