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Related Concept Videos

Conserved Binding Sites01:49

Conserved Binding Sites

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Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
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Proteins are dynamic macromolecules that carry out a wide variety of essential processes; however, the activities of most proteins depend on their interactions with other molecules or ions, known as ligands.
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Allosteric proteins have more than one ligand binding site; the binding of a ligand to any of these sites influences the binding of ligands to the other sites. When a protein is allosteric, its binding sites are called coupled or linked.  In the case of enzymes, the site that binds to the substrate is known as the active site and the other site is known as the regulatory site. When a ligand binds to the regulatory site, this leads to conformational changes in the protein that can influence...
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The equilibrium binding constant (Kb) quantifies the strength of a protein-ligand interaction. Kb can be calculated as follows when the reaction is at equilibrium:
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Determination of Protein-ligand Interactions Using Differential Scanning Fluorimetry
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Cold Spots in Protein Binding.

Jason Shirian1, Oz Sharabi1, Julia M Shifman1

  • 1Department of Biological Chemistry, The Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.

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Summary
This summary is machine-generated.

Researchers introduce

Keywords:
binding affinitybinding energeticsbinding landscapesprotein–protein interactionssaturation mutagenesis

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Area of Science:

  • Biochemistry
  • Structural Biology
  • Protein Engineering

Background:

  • Protein-binding interfaces are crucial for biological functions.
  • Binding hot spots are known to contribute significantly to binding affinity.
  • Understanding interface energetics aids basic research and biotechnological design.

Purpose of the Study:

  • Introduce the concept of 'binding cold spots'.
  • Highlight the potential for affinity enhancement at these suboptimal positions.
  • Emphasize the importance of identifying cold spots for protein evolution and design.

Main Methods:

  • Conceptual review and synthesis of existing data.
  • Analysis of examples from protein-engineering studies.
  • Discussion of implications for protein design and evolution.

Main Results:

  • Definition and characterization of 'binding cold spots'.
  • Demonstration of cold spots as sites for potential affinity enhancement via mutation.
  • Examples illustrating the presence and significance of cold spots.

Conclusions:

  • Binding cold spots represent a novel perspective on protein-binding interfaces.
  • Identifying cold spots is critical for advancing protein engineering and understanding protein evolution.
  • The concept offers new avenues for designing enhanced binding domains.