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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.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
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Protein Networks02:26

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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 Families

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Protein families are groups of homologous proteins; that is, they have similarities in amino acid sequences and three-dimensional structures. Protein families usually occur because of gene duplication, where an additional copy of a gene is inserted into the genome of an organism.   Mutations that change the amino acids but still allow the protein to be properly synthesized, will lead to new protein family members.   If these new proteins contain similar amino acids in key...
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Genome Annotation and Assembly03:36

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The genome refers to all of the genetic material in an organism. It can range from a few million base pairs in microbial cells to several billion base pairs in many eukaryotic organisms. Genome assembly refers to the process of taking the DNA sequencing data and putting it all back together in a correct order to create a close representation of the original genome. This is followed by the identification of functional elements on the newly assembled genome, a process called genome annotation.
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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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PANADA: protein association network annotation, determination and analysis.

Alberto J M Martin1, Ian Walsh, Tomás Di Domenico

  • 1Department of Biology, University of Padova, Padova, Italy.

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|November 23, 2013
PubMed
Summary
This summary is machine-generated.

Functional annotation of proteins is crucial. PANADA is a new toolkit for visualizing and analyzing protein similarity networks, aiding functional inference from sequence or structure homology.

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Area of Science:

  • Bioinformatics
  • Computational Biology
  • Structural Biology

Background:

  • Accurate protein functional annotation is essential for biological research.
  • Current methods often rely on pairwise homology inference (sequence or structure).
  • Protein similarity networks offer a powerful approach for visualizing relationships and assessing functional inference transferability.

Purpose of the Study:

  • To introduce PANADA, a novel toolkit for protein similarity network analysis.
  • To provide a user-friendly platform for visualizing and analyzing protein relationships.
  • To facilitate functional annotation through network-based approaches.

Main Methods:

  • PANADA constructs protein similarity networks using pairwise sequence or structural alignments.
  • Networks can be built from a set of proteins or via database searches from a single sequence.
  • The toolkit integrates with Cytoscape for network visualization and analysis.

Main Results:

  • PANADA enables the creation and exploration of protein similarity networks.
  • The toolkit supports functional inference by visualizing protein relationships.
  • It offers flexibility in network construction based on different alignment strategies.

Conclusions:

  • PANADA is a valuable tool for researchers needing to annotate protein function.
  • The toolkit enhances the visualization and analysis of protein similarity networks.
  • It supports efficient functional inference through homology-based network construction.