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Related Concept Videos

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...
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 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...
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...
Proteins: From Genes to Degradation02:11

Proteins: From Genes to Degradation

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.
Transcription is the synthesis of RNA molecules by RNA...
Proteins: From Genes to Degradation02:11

Proteins: From Genes to Degradation

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.
Transcription is the synthesis of RNA molecules by RNA...

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A balance of protein synthesis and proteasome-dependent degradation determines the maintenance of LTP.

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Related Experiment Video

Updated: Jul 18, 2026

Examining Proteasome Assembly with Recombinant Archaeal Proteasomes and Nondenaturing PAGE: The Case for a Combined Approach
09:57

Examining Proteasome Assembly with Recombinant Archaeal Proteasomes and Nondenaturing PAGE: The Case for a Combined Approach

Published on: December 17, 2016

Proteasome function and protein biosynthesis.

Ramunas M Vabulas1

  • 1Department of Cellular Biochemistry, Max Planck Institute of Biochemistry, Martinsried, Germany. vabulas@biochem.mpg.de

Current Opinion in Clinical Nutrition and Metabolic Care
|December 5, 2006
PubMed
Summary

This review highlights recent discoveries linking protein synthesis and degradation. Understanding these protein turnover mechanisms is crucial for cellular adaptation and developing therapies for nutrient deficiencies.

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Cycloheximide Chase Analysis of Protein Degradation in Saccharomyces cerevisiae

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Last Updated: Jul 18, 2026

Examining Proteasome Assembly with Recombinant Archaeal Proteasomes and Nondenaturing PAGE: The Case for a Combined Approach
09:57

Examining Proteasome Assembly with Recombinant Archaeal Proteasomes and Nondenaturing PAGE: The Case for a Combined Approach

Published on: December 17, 2016

Assaying Proteasomal Degradation in a Cell-free System in Plants
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Assaying Proteasomal Degradation in a Cell-free System in Plants

Published on: March 26, 2014

Cycloheximide Chase Analysis of Protein Degradation in Saccharomyces cerevisiae
09:05

Cycloheximide Chase Analysis of Protein Degradation in Saccharomyces cerevisiae

Published on: April 18, 2016

Area of Science:

  • Molecular Biology
  • Cellular Physiology
  • Biochemistry

Background:

  • Protein turnover, governed by synthesis and degradation, is essential for organismal adaptation to diverse needs.
  • Cellular mechanisms underlying protein synthesis and degradation are progressively being elucidated.
  • Recent research reveals novel connections between protein synthesis and degradation pathways.

Purpose of the Study:

  • To review recent findings on the interplay between protein synthesis and degradation.
  • To discuss the implications of these findings for cellular adaptation and nutrient metabolism.
  • To highlight emerging areas in the regulation of protein turnover.

Main Methods:

  • Literature review of recent scientific publications.
  • Synthesis of findings from diverse studies on protein synthesis and degradation.
  • Analysis of regulatory mechanisms governing protein turnover.

Main Results:

  • Lysosomal-autophagosomal degradation's role in cellular physiology and as an amino acid source for protein synthesis has been expanded.
  • Proteasomal degradation is critical for maintaining protein synthesis during nutrient restriction.
  • Regulation of translation factors via degradation has emerged as a new area of study.

Conclusions:

  • Understanding protein turnover mechanisms is key to addressing (patho)physiological conditions related to nutrient deficiencies.
  • Elucidation of these processes may lead to novel therapeutic strategies for nutrient-related disorders.
  • Further research into the interplay of protein synthesis, degradation, and cellular adaptation is warranted.