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Related Concept Videos

Protein Organization01:24

Protein Organization

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Proteins are polymers of amino acid residues. They are versatile and responsible for different cellular functions, including DNA replication, molecular transport, catalysis, and structural support. Proteins have a hierarchical structure comprising at least three levels of organization: primary, secondary, and tertiary structure. Some large proteins have a quaternary structure where individual protein subunits are linked together.
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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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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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A proteome is the entire set of proteins that a cell type produces. We can study proteomes using the knowledge of genomes because genes code for mRNAs, and the mRNAs encode proteins. Although mRNA analysis is a step in the right direction, not all mRNAs are translated into proteins.
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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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In Vivo Functional Study of Disease-associated Rare Human Variants Using Drosophila
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Analyzing disease-associated protein structures with visual analytics.

Dennis Bromley1, Valerie Daggett

  • 1Division of Biomedical and Health Informatics, University of Washington, Seattle, WA.

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Summary
This summary is machine-generated.

ContactWalker visualizes protein structural differences to understand disease mechanisms. This tool aids in developing therapies for diseases like ataxia with vitamin E deficiency (AVED) and investigating tumor suppressor p53 mutations.

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Area of Science:

  • Biochemistry
  • Structural Biology
  • Computational Biology

Background:

  • Protein structure dictates protein function, making the study of disease-associated structural changes crucial for understanding and treating illnesses.
  • Identifying structural alterations in proteins is key to comprehending protein-mediated diseases and devising effective clinical interventions.

Purpose of the Study:

  • To introduce ContactWalker, a visual analytics tool designed for comparing wild-type and disease-associated protein structures.
  • To leverage molecular dynamics simulations for investigating structural and physical differences in proteins.
  • To apply ContactWalker to characterize diseases such as ataxia with vitamin E deficiency (AVED) and explore mutations in tumor suppressor protein p53.

Main Methods:

  • Development of the ContactWalker visual analytics tool.
  • Utilizing molecular dynamics simulations to analyze protein structures.
  • Comparative analysis of wild-type versus disease-associated protein conformations.

Main Results:

  • Successful characterization of structural and physical differences in proteins linked to ataxia with vitamin E deficiency (AVED).
  • Demonstrated utility of ContactWalker in analyzing disease-specific protein alterations.

Conclusions:

  • ContactWalker is an effective tool for investigating protein structure-function relationships in disease.
  • The tool facilitates the study of disease mechanisms and aids in the development of targeted therapies.
  • Future applications include the analysis of other disease-associated proteins, such as the tumor suppressor p53.