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Videos de Conceptos Relacionados

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...
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 Complex Assembly02:41

Protein Complex Assembly

Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types.  Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
Many viruses self-assemble into a fully functional unit using the infected host cell to...
Protein Complex Assembly02:41

Protein Complex Assembly

Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types.  Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
Many viruses self-assemble into a fully functional unit using the infected host cell to...

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Video Experimental Relacionado

Updated: Jun 1, 2026

High-Resolution Complexome Profiling by Cryoslicing BN-MS Analysis
09:33

High-Resolution Complexome Profiling by Cryoslicing BN-MS Analysis

Published on: October 15, 2019

Análisis del complejo corregulador endógeno humano complejo.

Anna Malovannaya1, Rainer B Lanz, Sung Yun Jung

  • 1Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA.

Cell
|May 31, 2011
PubMed
Resumen

Este estudio mapea las redes de interacción de proteínas humanas utilizando espectrometría de masas, revelando nuevas asociaciones de proteínas y una estructura organizativa escalonada de proteomas celulares. Esto proporciona un recurso para la comprensión de la regulación transcripcional.

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Área de la Ciencia:

  • La proteómica es la proteómica.
  • Biología de Sistemas Biología de Sistemas.
  • Biología Molecular Biología Molecular

Sus antecedentes:

  • Comprender las interacciones endógenas proteína-proteína es crucial para la investigación biológica.
  • Los métodos existentes a menudo no logran capturar interacciones débiles o transitorias.

Objetivo del estudio:

  • Mapear de manera exhaustiva las redes complejas de proteínas correguladoras humanas endógenas.
  • Identificar nuevas asociaciones de proteínas y comprender sus principios organizativos.

Principales métodos:

  • Análisis integrador basado en espectrometría de masas de 3290 purificaciones de afinidad.
  • Preservación de las interacciones de proteínas débiles durante el aislamiento complejo.
  • Utilizando una alta reciprocidad en un gran conjunto de datos.

Principales resultados:

  • Identificación de numerosas asociaciones de proteínas no reportadas, incluida una red de transcripción (ZMYND8, ZNF687, ZNF592).
  • Reveló una interacción escalonada dentro de las redes, organizando el proteoma en módulos endógenos mínimos (MEMOs), isoformas complejas (uniCOREs) y redes de interacción complejo-complejo (CCIs).

Conclusiones:

  • El recurso desarrollado proporciona una organización conceptual del proteoma celular.
  • Facilita la vinculación de los estudios genómicos con la función de las proteínas para la generación y prueba de hipótesis.