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Regulated Protein Degradation02:58

Regulated Protein Degradation

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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...
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The Proteasome02:18

The Proteasome

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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...
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The Proteasome Structure01:17

The Proteasome Structure

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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.
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Proteins: From Genes to Degradation02:11

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Within a biological system, the DNA encodes the RNA, and the nucleotide sequence in the RNA further defines the amino acid sequence in the protein. This is referred to as “The Central Dogma of Molecular Biology” - a term coined by Francis Crick.  Central dogma is a firm principle in biology that defines the flow of genetic information within any life form. The two fundamental steps in central dogma are - transcription and translation.
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Targeted Cancer Therapies02:57

Targeted Cancer Therapies

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The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
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Export of Misfolded Proteins out of the ER01:32

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After folding, the ER assesses the quality of secretory and membrane proteins. The correctly folded proteins are cleared by the calnexin cycle for transport to their final destination, while misfolded proteins are held back in the ER lumen. The ER chaperones attempt to unfold and refold the misfolded proteins but sometimes fail to achieve the correct native conformation. Such terminally misfolded proteins are then exported to the cytosol by ER-associated degradation or ERAD pathway for...
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Updated: Jun 7, 2025

High-Throughput Cellular Profiling of Targeted Protein Degradation Compounds Using HiBiT CRISPR Cell Lines
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SnapShot: degradación dirigida de las proteínas

Yu Ding1, Boxun Lu1

  • 1State Key Laboratory of Medical Neurobiology, Neurology Department at Huashan Hospital, School of Life Sciences, Fudan University, Shanghai 200433, China.

Cell
|November 15, 2024
PubMed
Resumen

La degradación proteica dirigida utiliza la maquinaria celular para eliminar proteínas específicas. Las nuevas tecnologías avanzan en el descubrimiento de fármacos y el estudio de proteínas intracelulares, de membrana y extracelulares.

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Área de la Ciencia:

  • La bioquímica
  • Biología molecular
  • Descubrimiento de drogas

Sus antecedentes:

  • La degradación proteica dirigida aprovecha los sistemas naturales de la célula para eliminar proteínas específicas.
  • Este enfoque ofrece una nueva estrategia para modular la función y la abundancia de proteínas.

Objetivo del estudio:

  • Explorar tecnologías emergentes en la degradación dirigida de proteínas.
  • Resaltar las aplicaciones en el descubrimiento de fármacos y la caracterización funcional de varios tipos de proteínas.

Principales métodos:

  • Aprovechando las vías de degradación celular endógena.
  • Desarrollo y aplicación de nuevas tecnologías dirigidas a la degradación.

Principales resultados:

  • Se ha demostrado el éxito en la degradación selectiva de proteínas de interés.
  • Abrió nuevas vías para estudios funcionales de proteínas intracelulares, de membrana y extracelulares.

Conclusiones:

  • La degradación proteica dirigida es una herramienta poderosa con amplias aplicaciones.
  • Las tecnologías emergentes están expandiendo el alcance y la eficacia de las estrategias de degradación de proteínas.