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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
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
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Protein Folding01:22

Protein Folding

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Overview
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Protein-protein Interfaces02:04

Protein-protein Interfaces

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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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Protein Denaturation01:28

Protein Denaturation

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The function of proteins depends on their native three-dimensional structure, which is dictated by the amino acid sequence of the specific protein. Folding of the polypeptide chain takes place under specific conditions that energetically favor the folded conformation. In contrast, protein denaturation occurs spontaneously under unfavorable conditions that disrupt the integrity of the folded conformation. Thus, the chemical and physical environment of a protein, such as significant changes in pH...
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Molecular Chaperones and Protein Folding03:00

Molecular Chaperones and Protein Folding

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The native conformation of a protein is formed by interactions between the side chains of its constituent amino acids. When the amino acids cannot form these interactions, the protein cannot fold by itself and needs chaperones. Notably, chaperones do not relay any additional information required for the folding of polypeptides; the native conformation of a protein is determined solely by its amino acid sequence. Chaperones catalyze protein folding without being a part of the folded protein.
The...
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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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Native Cell Membrane Nanoparticles System for Membrane Protein-Protein Interaction Analysis
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Native Cell Membrane Nanoparticles System for Membrane Protein-Protein Interaction Analysis

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Protein-Nanoparticle Interaction-Induced Changes in Protein Structure and Aggregation.

Yuna Kim1, Sung Min Ko1, Jwa-Min Nam2

  • 1Seoul National University, Department of Chemistry, Seoul, 151-742, South Korea.

Chemistry, an Asian Journal
|April 11, 2016
PubMed
Summary

Nanoparticles (NPs) are crucial in biomedical applications, influencing protein structure and aggregation. This review explores recent studies on NP interactions with proteins, aiding disease understanding and NP fate analysis.

Keywords:
aggregationnanoparticlesnoncovalent interactionsproteinsself-assembly

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Area of Science:

  • Biomedical Engineering
  • Materials Science
  • Biochemistry

Background:

  • Nanoparticles (NPs) possess unique properties like large surface area, small size, and biocompatibility, making them valuable for diverse biomedical applications including biosensing, imaging, diagnostics, drug delivery, and therapeutics.
  • The interaction between proteins and NPs is a critical area of research, essential for understanding and optimizing NP-based biomedical applications and biological processes like protein aggregation in diseases such as Alzheimer's disease.

Purpose of the Study:

  • This review synthesizes recent research on the roles and applications of nanoparticles in modulating protein structural changes and aggregation processes.
  • To provide fundamental insights into how NPs affect protein structure and aggregation mechanisms.
  • To explore how understanding NP-protein interactions can elucidate the fate and roles of NPs within the human body.

Main Methods:

  • Literature review of recent studies focusing on nanoparticle-protein interactions.
  • Analysis of research investigating nanoparticle effects on protein structure.
  • Examination of studies detailing nanoparticle-induced protein aggregation.

Main Results:

  • Nanoparticles significantly influence protein structure, leading to conformational changes and altered aggregation pathways.
  • Specific NP properties (e.g., size, surface chemistry) dictate the nature and extent of protein interactions.
  • Understanding these interactions is key to developing targeted NP-based therapies and diagnostics.

Conclusions:

  • Nanoparticle-protein interactions are fundamental to advancing biomedical applications and understanding disease mechanisms.
  • Further research into these interactions will refine NP design for therapeutic and diagnostic purposes.
  • This knowledge is crucial for predicting and managing the in-vivo behavior of nanoparticles.