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Related Concept Videos

Covalently Linked Protein Regulators02:04

Covalently Linked Protein Regulators

Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein.
Covalently Linked Protein Regulators02:04

Covalently Linked Protein Regulators

Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein.
Protein-protein Interfaces02:04

Protein-protein Interfaces

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 polypeptide...
Protein-Protein Interfaces02:04

Protein-Protein Interfaces

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 polypeptide...
Regulated Protein Degradation02:58

Regulated Protein Degradation

It is vital to regulate the activity of enzymatic as well as non-enzymatic proteins inside the cell. This can be achieved either through creating a balance between their rate of synthesis and degradation or regulating the intrinsic activity of the protein. Both these regulation mechanisms play an essential role in the normal functioning of cells.
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
Conserved Binding Sites01:49

Conserved Binding Sites

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.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally analyses the...

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Computational Prediction of Amino Acid Preferences of Potentially Multispecific Peptide-Binding Domains Involved in Protein-Protein Interactions
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Computational Prediction of Amino Acid Preferences of Potentially Multispecific Peptide-Binding Domains Involved in Protein-Protein Interactions

Published on: January 26, 2024

Protein-protein recognition control by modulating electrostatic interactions.

Song Han1, Shijin Yin, Hong Yi

  • 1State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, Hubei, P. R. China.

Journal of Proteome Research
|April 22, 2010
PubMed
Summary
This summary is machine-generated.

This study introduces a novel protein-protein recognition technique using electrostatic interactions. A modified potassium channel inhibitor, BmP05-T, demonstrated that nonbinding interfaces can control protein binding orientation.

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Published on: July 14, 2015

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Structural Biology

Background:

  • Protein-protein interactions are crucial in biological systems.
  • Understanding the mechanisms of protein recognition is essential for developing new functional proteins.
  • Current methods for controlling protein interactions are limited.

Purpose of the Study:

  • To develop a novel technique for protein-protein control recognition.
  • To investigate the role of electrostatic interactions in protein binding.
  • To demonstrate the ability of nonbinding interfaces to control binding orientation.

Main Methods:

  • Design of a modified potassium channel inhibitor (BmP05-T) with translocated charged residues.
  • Comparison of BmP05-T with wild-type BmP05 to analyze binding interface changes.
  • Utilizing electrostatic interactions to control protein binding orientation.

Main Results:

  • BmP05-T exhibited 90.32% identity to wild-type BmP05.
  • Translocation of negatively charged residues switched the binding interface of BmP05 inhibitor.
  • Demonstrated that nonbinding interfaces can direct the orientation of protein binding interfaces.

Conclusions:

  • A new protein-protein control recognition technique based on electrostatic interactions was established.
  • Nonbinding interfaces play a critical role in orienting protein binding interfaces.
  • The findings have potential applications in designing and utilizing functional proteins.