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Related Concept Videos

Peptide Bonds02:43

Peptide Bonds

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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Synthesis of an Intein-mediated Artificial Protein Hydrogel
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Published on: January 27, 2014

Binary polypeptide system for permanent and oriented protein immobilization.

Enrico Ferrari1, Frédéric Darios, Fan Zhang

  • 1MRC Laboratory of Molecular Biology, Cambridge, Hills Road, CB2 0QH, UK. bazbek@mrc-lmb.cam.ac.uk.

Journal of Nanobiotechnology
|May 14, 2010
PubMed
Summary

A novel irreversible protein attachment system (IPAS) offers a recombinant alternative to traditional affinity tags. This self-assembling polypeptide system provides robust protein immobilization for diverse biotechnological applications.

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Area of Science:

  • Molecular Biology
  • Biotechnology
  • Nanotechnology

Background:

  • Binary affinity tags are crucial for molecular biology, diagnostics, and biotechnology.
  • Current systems like biotin/streptavidin require chemical coupling for tag attachment.
  • Existing peptide tags have limitations in recombinant applications.

Purpose of the Study:

  • To develop a new, robust protein immobilization system.
  • To create a recombinant system for protein tagging and capture.
  • To offer an alternative to chemical cross-linking and existing affinity tags.

Main Methods:

  • Utilized the core region of the SNARE complex for a two-component self-assembling system.
  • Developed recombinant tagging strategies using modified syntaxin, SNAP25, and synaptobrevin.
  • Demonstrated system compatibility with various surfaces and applications.

Main Results:

  • Reported a novel irreversible protein attachment system (IPAS).
  • Achieved non-covalent yet nearly irreversible complex formation.
  • Demonstrated stability in harsh conditions (detergents, chaotropic agents, acids, alkali).
  • Showcased IPAS utility with beads, chromatography, planar surfaces, Biacore, and gold nanoparticles.

Conclusions:

  • IPAS provides a versatile alternative to chemical cross-linking and current affinity tag systems.
  • The system is suitable for recombinant protein tagging, capture, and immobilization.
  • IPAS has broad applicability in nanotechnology and molecular sciences.