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Related Concept Videos

Protein Folding01:25

Protein Folding

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Proteins are chains of amino acids linked together by peptide bonds. Upon synthesis, a protein folds into a three-dimensional conformation, critical to its biological function. Interactions between its constituent amino acids guide protein folding, and hence the protein structure is primarily dependent on its amino acid sequence.
Protein Structure Is Critical to Its Biological Function
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Amyloid fibrils are aggregates of misfolded proteins.  Under most circumstances, misfolded proteins are either refolded by chaperone proteins or degraded by the proteasome. However, in the case of a mutation or a disease, these proteins can accumulate to form large clusters and often further assemble to form elongated fibers, called fibrils. 
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Fibrous Proteins00:55

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Fibrous proteins are either long and narrow proteins or assemble to form long and thin structures. They contain repetitive units and usually consist of either alpha helices or beta sheets and, in rare cases, a mix of both. The amino acids in the primary structure often consist of repeating amino acid sequences. The role of fibrous proteins is primarily structural. Many are located in the extracellular matrix and are present in connective tissues to impart strength and joint mobility. They are...
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Many proteins can be classified into two distinct subtypes - globular or fibrous. These two types differ in their shapes and solubilities.
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Peptide Bonds02:43

Peptide Bonds

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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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Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides
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Design of Multicomponent Peptide Fibrils with Ordered and Programmable Compositional Patterns.

Dan Cheng1, Xin Chen1, Weijia Zhang1

  • 1Department of Chemistry, Collage of Chemistry and Chemical Engineering, Xiamen University, The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, Xiamen, 361005, China.

Angewandte Chemie (International Ed. in English)
|April 4, 2023
PubMed
Summary
This summary is machine-generated.

Scientists developed a new method for precisely arranging molecules in peptide fibrils. This neighbor-controlled patterning strategy allows for fine-tuning the composition and position of peptides, enabling advanced biomaterial design.

Keywords:
CompositionFibrilsPatternsPeptide PositionsPeptides

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Area of Science:

  • Biomaterials Science
  • Supramolecular Chemistry
  • Nanotechnology

Background:

  • Advanced applications of biomacromolecular assemblies necessitate precise control over molecular arrangement.
  • Current synthetic methods face challenges in achieving this level of control.

Purpose of the Study:

  • To develop a novel strategy for creating multicomponent peptide fibrils with controlled molecular patterning.
  • To demonstrate the ability to manipulate local composition and peptide positions within these fibrils.

Main Methods:

  • Employed a neighbor-controlled patterning strategy for peptide co-assembly.
  • Designed eight peptides with regulable nearest neighbors.
  • Utilized simulation to predict potential patterns and experimental validation to construct specific patterns.

Main Results:

  • Achieved unprecedented control over local composition and peptide positions within fibrils.
  • Simulations predicted 412 distinct patterns, and six prescribed patterns were experimentally constructed with high accuracy.
  • Demonstrated the application of controlled patterning to functional elements, such as arranging carbohydrate ligands for protein recognition.

Conclusions:

  • The neighbor-controlled patterning strategy offers a route to molecular editing of peptide assembly structures.
  • This approach enables the design of biomaterials with unique and rich patterning-based properties.
  • Paves the way for advanced material design with nanoscale precision.