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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.
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Multiprotein signaling complexes are formed in a dynamic process involving protein-protein interactions at the cytoplasmic domain of transmembrane receptors or enzymatic and non-enzymatic proteins associated with the receptor. These complexes ensure the activation and propagation of intracellular signals that regulate cell functions.
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Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
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Complex microtubule structures are present in resting cells and in dividing cells. In resting cells, they are responsible for maintaining the cellular architecture, tracks for intracellular transport, positioning of organelles, assembly of cilia and flagella. They mediate the bipolar spindle assembly for chromosomal segregation and positioning of the cell division plate in dividing cells. The formation of microtubule complex structures depends on the cell type, cell stage, and cell function.
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A High Modulus, Multi-Stimuli Responsive, Interwoven Protein Network With Topologically Confined Micro-Association.

Tingjie Xu1, Yibin Sun1, Yu-Xiang Wang1

  • 1Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry & Physics of Ministry of Education, Center for Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P.R. China.

Angewandte Chemie (International Ed. in English)
|October 21, 2025
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel self-healing, all-protein material with tunable mechanical strength. This advanced biomaterial integrates dynamic adaptability and functional activity for versatile applications.

Keywords:
All‐protein‐based HydrogelsMicrophase SeparationStimuli‐responsive MaterialsTopological ProteinsWoven Networks

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Area of Science:

  • Biomaterials Science
  • Protein Engineering
  • Polymer Chemistry

Background:

  • All-protein materials offer genetic encodability and precise structures but struggle to combine mechanical strength, dynamic adaptability, and functional activity.
  • Integrating these properties into a single system remains a significant challenge in materials science.

Purpose of the Study:

  • To engineer a multi-stimuli-responsive, self-healing, all-protein-based network with enhanced mechanical properties and tunable characteristics.
  • To establish topological proteins as a versatile platform for advanced biomaterial design.

Main Methods:

  • Construction of a network using pseudo[2]catenanes with p53dim for entanglement and SpyTag-SpyCatcher for cyclization.
  • Triggering network formation via concentration, calmodulin (CaM) binding, or light irradiation.
  • Enhancing mechanical properties through tempering-induced micro-association within the topologically confined network.

Main Results:

  • Development of a multi-stimuli-responsive, self-healing, all-protein network with an interwoven topology.
  • Demonstrated reinforcement of mechanical strength and long-term stability via topologically confined micro-associations.
  • Successful application in controlled release and enzyme immobilization, showcasing the material's utility.

Conclusions:

  • Topological proteins provide a versatile platform for creating genetically programmable, mechanically tunable, and stimuli-responsive biomaterials.
  • The developed network overcomes previous limitations by integrating mechanical strength, dynamic adaptability, and functional activity.