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Videos de Conceptos Relacionados

Ligand Binding and Linkage00:49

Ligand Binding and Linkage

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 the...
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.
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Protein Networks02:26

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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,...
Ligand Binding and Linkage00:49

Ligand Binding and Linkage

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 the...
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 Complexes with Interchangeable Parts01:57

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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.
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Updated: Jul 6, 2026

Monitoring the Assembly of a Secreted Bacterial Virulence Factor Using Site-specific Crosslinking
11:33

Monitoring the Assembly of a Secreted Bacterial Virulence Factor Using Site-specific Crosslinking

Published on: December 17, 2013

Un enfoque modular de enlaces cruzados para explorar las interacciones de las proteínas.

Michelle Trester-Zedlitz1, Katsuhiko Kamada, Stephen K Burley

  • 1Laboratories of Synthetic Protein Chemistry, Rockefeller University, 1230 York Avenue, New York, NY 10021, USA.

Journal of the American Chemical Society
|February 27, 2003
PubMed
Resumen
Este resumen es generado por máquina.

Este estudio introduce un nuevo método para mapear las interacciones proteína-proteína utilizando reactivos avanzados de enlace cruzado y espectrometría de masas. La técnica aclaró con éxito las interacciones dentro del complejo negativo del cofactor 2.

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Área de la Ciencia:

  • La bioquímica es la bioquímica.
  • La Proteómica es la Proteómica.
  • Biología Química Biología química.

Sus antecedentes:

  • Comprender las interacciones proteína-proteína es crucial para descifrar los mecanismos celulares.
  • Los métodos existentes para estudiar estas interacciones pueden ser limitados en alcance o sensibilidad.

Objetivo del estudio:

  • Desarrollar y validar un nuevo enfoque integrado para el esclarecimiento de las interacciones proteína-proteína.
  • Aplicar este método para investigar la organización estructural del complejo negativo del cofactor 2.

Principales métodos:

  • Una estrategia modular de síntesis de fase sólida para nuevos reactivos de enlace cruzado.
  • Enriquecimiento y digestión de proteínas reticuladas utilizando microconcentradores.
  • Análisis espectrométrico de masas de péptidos reticulados junto con análisis computacional.

Principales resultados:

  • El método integrado permitió la identificación de péptidos reticulados.
  • El enfoque se aplicó con éxito para estudiar los enlaces cruzados dentro del complejo de cofactor 2 negativo heterodímero.
  • Esto proporciona una plataforma robusta para el mapeo de redes de interacción de proteínas.

Conclusiones:

  • El método descrito ofrece una poderosa herramienta para estudiar las interacciones proteína-proteína.
  • Este enfoque mejora la comprensión de los sistemas biológicos complejos a través de un mapeo detallado de la interacción.
  • La técnica es ampliamente aplicable a varios complejos de proteínas y contextos biológicos.