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Peptide Bonds02:43

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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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Proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or protective. They may serve in transport, storage, or membranes; or they may be toxins or enzymes. Their structures, like their functions, vary greatly. They are all, however, amino acid polymers arranged in a linear sequence.
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In multi-pass transmembrane proteins, the polypeptide chain crosses the membrane more than once. The transmembrane polypeptide chain either forms an α-helix or β-strand structure. α-Helix containing multi-pass transmembrane proteins are ubiquitous, whereas β-strand containing ones are mainly found in gram-negative bacteria, mitochondria, and chloroplasts.
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Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a...
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Preparation and Friction Force Microscopy Measurements of Immiscible, Opposing Polymer Brushes
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Preparation and Friction Force Microscopy Measurements of Immiscible, Opposing Polymer Brushes

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Patterned Polypeptoid Brushes.

Maximilian Schneider1, Zian Tang1, Marcus Richter1

  • 1Chair of Macromolecular Chemistry, Department of Chemistry and Food Chemistry, School of Science, TU Dresden, Mommsenstr. 4, 01069 Dresden, Germany.

Macromolecular Bioscience
|November 3, 2015
PubMed
Summary
This summary is machine-generated.

Patterned polypeptoid brushes offer excellent resistance to biofouling on various surfaces. These brushes can be patterned using standard techniques and chemically modified, showing broad applicability in surface science.

Keywords:
microstructuringnon-foulingpolymer brushpolysarcosinesurface initiated polymerizition

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Area of Science:

  • Polymer Chemistry
  • Surface Science
  • Biomaterials

Background:

  • Biofouling presents challenges in various applications, including medical devices and sensors.
  • Developing surfaces resistant to biofouling is crucial for improving device performance and longevity.
  • Polypeptoid brushes offer tunable properties for surface modification.

Purpose of the Study:

  • To synthesize patterned polypeptoid brushes on gold and oxide substrates.
  • To evaluate the biofouling resistance of these polypeptoid brushes.
  • To demonstrate the compatibility of polypeptoid brushes with common patterning techniques and their chemical accessibility for further functionalization.

Main Methods:

  • Surface-initiated polymerization of N-substituted glycine N-carboxyanhydrides to create polypeptoid brushes.
  • Protein and cell adhesion experiments to assess biofouling resistance.
  • UV-lithography and microcontact printing (μCP) for patterning.
  • Functionalization of terminal amine groups with fluorescent dyes.

Main Results:

  • Successful synthesis of patterned polypeptoid brushes on gold and oxide surfaces.
  • Demonstrated significant resistance to protein and cell adhesion, indicating excellent biofouling resistance.
  • Confirmed compatibility with UV-lithography and μCP patterning methods.
  • Successfully functionalized the polypeptoid brushes with fluorescent dyes, showcasing chemical accessibility.

Conclusions:

  • Patterned polypeptoid brushes provide a robust platform for creating biofouling-resistant surfaces.
  • The synthesis method and patterning techniques are versatile and applicable to various substrates.
  • The chemical accessibility allows for further customization and integration into complex systems.