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Related Concept Videos

Protein Networks02:26

Protein Networks

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An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
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Protein Networks02:26

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Polymers02:34

Polymers

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The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the...
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Covalently Linked Protein Regulators02:04

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Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
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Protein Complex Assembly02:41

Protein Complex Assembly

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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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Updated: Feb 7, 2026

Combining Chemical Cross-linking and Mass Spectrometry of Intact Protein Complexes to Study the Architecture of Multi-subunit Protein Assemblies
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Modular Assembly of Dynamic Polymer Networks From Heteroaffinity Cross-Links to Multivalent Proteins.

Tianyue Dai1, Yuntao Qiu1,2, Katherine M Leon Hernandez1

  • 1Department of Chemistry, Rutgers University-Newark, Newark, New Jersey, USA.

Angewandte Chemie (International Ed. in English)
|February 6, 2026
PubMed
Summary

Researchers developed novel heteroaffinity cross-linkers (HAX) for dynamic polymer networks (DPN). These HAX enable the creation of self-healing, biologically compatible materials with tunable properties, including pH-responsive and magnetically targeted delivery systems.

Keywords:
NMR spectroscopybiophysicsnonequilibrium processespolymersself‐assembly

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Photo-Induced Cross-Linking of Unmodified Proteins PICUP Applied to Amyloidogenic Peptides
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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Biotechnology

Background:

  • Dynamic polymer networks (DPNs) offer self-healing and environmental responsiveness through transient cross-linking.
  • Integrating transient cross-linking into biocompatible materials is challenging due to chemical incompatibilities and difficulty tuning evolved biological interactions.

Purpose of the Study:

  • To develop chemically tunable and biologically compatible DPNs.
  • To create a versatile platform for advanced material design using heteroaffinity cross-linkers (HAX).

Main Methods:

  • Designed bifunctional heteroaffinity cross-linkers (HAX) with varying binding affinities to protein sites.
  • Utilized differential dissociation rates for purification of protein modules with monodisperse HAX valencies.
  • Assembled DPNs from stoichiometrically identical protein module pairs, creating unique network topologies.

Main Results:

  • Demonstrated HAX assembly using the avidin-biotin interaction.
  • Developed a pH-sensitive HAX enabling robust, pH-responsive DPN assembly dynamics.
  • Engineered a magnetically responsive DPN for targeted molecular delivery to low-pH environments like tumor microenvironments.

Conclusions:

  • HAX provide a method for creating tunable, biologically compatible DPNs.
  • The developed HAX system allows for precise control over network topology and material properties.
  • This approach enables the development of advanced responsive materials for applications such as targeted drug delivery.