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Related Concept Videos

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...
Protein Complexes with Interchangeable Parts01:57

Protein Complexes with Interchangeable Parts

Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
Protein Complexes with Interchangeable Parts01:57

Protein Complexes with Interchangeable Parts

Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
Protein Networks02:26

Protein Networks

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,...
Protein Networks02:26

Protein Networks

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 WISDOM: A Workbench for In silico De novo Design of BioMolecules
10:58

Protein WISDOM: A Workbench for In silico De novo Design of BioMolecules

Published on: July 25, 2013

A de novo designed protein protein interface.

Po-Ssu Huang1, John J Love, Stephen L Mayo

  • 1Howard Hughes Medical Institute and Division of Biology, California Institute of Technology, Pasadena, California 91125, USA.

Protein Science : a Publication of the Protein Society
|November 22, 2007
PubMed
Summary

Researchers designed novel protein dimers from monomers using computational docking and sequence design. Experimental validation confirmed specific dimer formation, advancing protein engineering and molecular self-assembly studies.

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Area of Science:

  • Biochemistry
  • Structural Biology
  • Protein Engineering

Background:

  • Understanding molecular self-assembly requires exploring physical and chemical parameters.
  • Generating novel protein oligomers is crucial for various biotechnological applications.

Purpose of the Study:

  • To develop a computational method for creating protein dimers from monomers.
  • To investigate the physical/chemical drivers of molecular self-assembly.
  • To design and characterize novel protein oligomers.

Main Methods:

  • Utilized a Fast Fourier Transform-based docking algorithm to model protein dimers.
  • Employed computational amino acid sequence design for interface residues.
  • Expressed, purified, and characterized designed proteins via analytical ultracentrifugation and heteronuclear NMR.

Main Results:

  • Successfully designed a heterodimer from variants of the beta1 domain of streptococcal protein G.
  • Experimental characterization confirmed specific dimer formation, evidenced by 2D-[(1)H,(15)N]-HSQC NMR spectra.
  • A modest dissociation constant (approximately 300 microM) was measured for the designed dimer.

Conclusions:

  • The developed computational approach enables the generation of specific protein dimers from monomers.
  • This method provides insights into molecular self-assembly principles.
  • The designed protein dimers demonstrate potential for applications in protein engineering and structural biology.