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Related Concept Videos

Protein Complex Assembly02:41

Protein Complex Assembly

Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types.  Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
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Antibody Actions

Antibodies, or immunoglobulins, are critical players in the immune system's arsenal against invading pathogens. Produced by B cells and plasma cells, their primary role is to detect and bind to specific antigens, molecules found on the surface of pathogens like bacteria or viruses. Beyond antigen recognition, antibodies perform several vital functions that contribute to immune defense.
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Antibody Structure

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Antigens Involved in Adaptive Immunity

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Complete antigens possess both immunogenicity and reactivity.

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Updated: May 10, 2026

Preparation of Mechanically Stable Self-Assembled Peptides Hydrogels
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Self-assembled peptide amphiphiles function as multivalent binder with increased hemagglutinin affinity.

Christine Hüttl1, Cornelia Hettrich, Reinhard Miller

  • 1Fraunhofer Institute for Biomedical Engineering IBMT, Am Mühlenberg 13, 14476, Potsdam, Germany.

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Modified peptide amphiphiles enhance binding to influenza virus hemagglutinin, improving diagnostic and therapeutic potential. These self-assembling molecules offer a promising approach for targeting viral surface proteins.

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A Miniaturized Glycan Microarray Assay for Assessing Avidity and Specificity of Influenza A Virus Hemagglutinins
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A Miniaturized Glycan Microarray Assay for Assessing Avidity and Specificity of Influenza A Virus Hemagglutinins

Published on: May 29, 2016

Area of Science:

  • Biochemistry
  • Materials Science
  • Virology

Background:

  • Peptide amphiphiles (PAs) are explored for diagnostic and therapeutic applications.
  • PAs consist of a hydrophilic peptide headgroup and a hydrophobic tail, self-assembling into micelles.
  • Investigating structure modifications to enhance self-assembly and binding to influenza virus hemagglutinin (HA).

Purpose of the Study:

  • To characterize peptide amphiphiles with structural modifications.
  • To evaluate their self-assembling capabilities and binding affinity to influenza virus hemagglutinin (HA).
  • To determine the impact of modifications on binding capacity and signal amplification.

Main Methods:

  • Design and synthesis of peptide amphiphiles with varying structures.
  • Surface plasmon resonance (SPR) measurements to assess binding kinetics and affinity to HA.
  • Characterization of molecular assembly, including critical micelle concentration (CMC) and colloidal size distribution.

Main Results:

  • Modified PAs demonstrated enhanced binding affinity to HA compared to unmodified peptides.
  • SPR measurements showed signal amplification due to peptide modifications while maintaining specificity.
  • Critical micelle concentration (CMC) determined to be 10⁻⁵ M, with characterized colloidal size distribution.

Conclusions:

  • Physico-chemical parameter modification of PAs enhances binding affinity to HA.
  • Modified PAs facilitate better examination of interactions with the viral surface protein.
  • These findings support the potential of PAs in diagnostic and therapeutic strategies against influenza A.