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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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Protein Organization01:13

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Protein Folding01:22

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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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Protein and Protein Structure02:15

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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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Conservation of Protein Domains Over Different Proteins02:26

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Protein domains are small structurally independent units that are part of a single amino acid chain.  Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
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Investigating Protein Sequence-structure-dynamics Relationships with Bio3D-web
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Principles of protein structural ensemble determination.

Massimiliano Bonomi1, Gabriella T Heller1, Carlo Camilloni2

  • 1Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, UK.

Current Opinion in Structural Biology
|January 8, 2017
PubMed
Summary
This summary is machine-generated.

Understanding protein dynamics requires studying structural ensembles, not just single structures. This approach is crucial for disordered proteins, improving biological function insights and guiding future research.

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Area of Science:

  • Biochemistry and Structural Biology
  • Computational Biology
  • Molecular Biophysics

Background:

  • Protein biological functions are critically linked to their dynamic conformational changes.
  • Intrinsically disordered proteins (IDPs), comprising a significant portion of the human proteome, exhibit extensive conformational heterogeneity.
  • Representing proteins as structural ensembles, rather than single static structures, provides a more accurate depiction of their behavior.

Purpose of the Study:

  • To extend established protein structure determination principles to the modeling of protein structural ensembles.
  • To address the challenges of analyzing conformationally heterogeneous states and averaged experimental data.
  • To review and compare current methods for structural ensemble determination.

Main Methods:

  • Review of literature combining experimental data and computational modeling for structural ensemble determination.
  • Analysis of conceptual challenges in modeling heterogeneous protein states.
  • Discussion of strategies for handling averaged experimental measurements and associated errors.

Main Results:

  • Identified similarities and differences in existing experimental and computational methods for modeling protein structural ensembles.
  • Highlighted conceptual difficulties in determining and validating structural ensembles.
  • Outlined future research directions for objective comparison and dissemination of structural ensemble data.

Conclusions:

  • Modeling protein structural ensembles is essential for understanding protein dynamics, especially for disordered proteins.
  • Further development of methods and validation criteria is needed for reliable structural ensemble determination.
  • Establishing objective standards for comparison, validation, visualization, and dissemination is crucial for advancing the field.