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Videos de Conceptos Relacionados

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

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...
The Proteasome02:18

The Proteasome

Eukaryotic cells can degrade proteins through several pathways. One of the most important amongst these is the ubiquitin-proteasome pathway. It helps the cell eliminate the misfolded, damaged, or unwarranted cytoplasmic proteins in a highly specific manner.
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. A series of enzymes carry out the ubiquitination of the target proteins - E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3...
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...
The Proteasome01:13

The Proteasome

Eukaryotic cells can degrade proteins through several pathways. One of the most important among these is the ubiquitin-proteasome pathway. It helps the cell eliminate the misfolded, damaged, or unwarranted cytoplasmic proteins in a highly specific manner.
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. This involves participation of a series of enzymes including— E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3 (ubiquitin...
The Proteasome Structure01:17

The Proteasome Structure

The ubiquitin-proteasome pathway is a well-known mechanism utilized by eukaryotic cells to remove cytoplasmic proteins that are misfolded, damaged, or no longer needed. In this pathway, the protein that needs to be eliminated undergoes a process called ubiquitination, where a chain of ubiquitin molecules is attached to the 48th lysine residue of the target protein. This ubiquitin modification helps the proteasome distinguish between a target protein and a healthy protein.
The proteasome is an...

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Video Experimental Relacionado

Updated: May 10, 2026

Detection of Protein Ubiquitination Sites by Peptide Enrichment and Mass Spectrometry
11:54

Detection of Protein Ubiquitination Sites by Peptide Enrichment and Mass Spectrometry

Published on: March 23, 2020

Complejidad estructural en el reconocimiento de la ubiquitina.

J Wade Harper1, Brenda A Schulman

  • 1Department of Pathology, Harvard Medical School, 77 Avenue Louis Pasteur, Boston, MA 02115, USA. wade_harper@hms.harvard.edu

Cell
|March 28, 2006
PubMed
Resumen
Este resumen es generado por máquina.

La clasificación de proteínas ubiquitinadas se basa en las proteínas de dominio de unión a la ubiquitina. Descubrimientos recientes revelan nuevas clases de proteínas e interacciones de la ubiquitina, aclarando cómo las proteínas ubiquitinadas se dirigen a vías celulares específicas.

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Ubiquitin Chain Analysis by Parallel Reaction Monitoring

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Detection of Protein Ubiquitination Sites by Peptide Enrichment and Mass Spectrometry
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Ubiquitin Chain Analysis by Parallel Reaction Monitoring
08:33

Ubiquitin Chain Analysis by Parallel Reaction Monitoring

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In Vitro Analysis of E3 Ubiquitin Ligase Function
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Published on: May 14, 2021

Área de la Ciencia:

  • La bioquímica es la bioquímica.
  • Biología celular Biología celular.
  • Biología Molecular Biología Molecular

Sus antecedentes:

  • Las proteínas ubiquitinadas son cruciales para la regulación celular.
  • Las interacciones proteicas específicas dictan el destino de las proteínas ubiquitinadas.
  • Comprender estas interacciones es clave para la función celular.

Objetivo del estudio:

  • Para dilucidar los mecanismos de la clasificación de proteínas ubiquitinadas.
  • Para resaltar el papel de las proteínas del dominio de unión a la ubiquitina (UBD) en este proceso.
  • Revisar los avances recientes en el campo de las proteínas UBD y sus interacciones con la ubiquitina.

Principales métodos:

  • Revisión de la literatura de estudios recientes sobre las proteínas UBD.
  • Análisis de las interacciones conocidas en el dominio de unión ubiquitina-ubiquitina.
  • Integración de los hallazgos para explicar las vías de clasificación de proteínas.

Principales resultados:

  • Identificación de diversas clases de proteínas UBD.
  • Caracterización de nuevas superficies de interacción en la ubiquitina.
  • Demostración de cómo estas interacciones facilitan distintas vías de clasificación para las proteínas ubiquitinadas.

Conclusiones:

  • La diversidad de las proteínas UBD y sus interacciones específicas con la ubiquitina son fundamentales para la clasificación precisa de las proteínas ubiquitinadas.
  • La investigación reciente ha avanzado significativamente en nuestra comprensión de estos complejos mecanismos celulares.
  • Este conocimiento proporciona una imagen más clara de cómo las vías celulares están reguladas por la ubiquitinación de proteínas.