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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...
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...
Amino Acid Catabolism01:18

Amino Acid Catabolism

Microorganisms rely on proteins as an essential carbon and energy source, particularly in environments with limited polysaccharides or lipids. However, proteins are too large to cross the plasma membrane unaided, necessitating enzymatic degradation. Microbes secrete extracellular proteases and peptidases that hydrolyze proteins into peptides, which can then be transported across the membrane. Once inside the cell, intracellular proteases degrade these peptides into free amino acids, which...

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Related Experiment Video

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

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Proteolytic systems: constructing degradomes.

Gonzalo R Ordóñez1, Xose S Puente, Víctor Quesada

  • 1Departamento de Bioquímica y Biología Molecular, Facultad de Medicina, Instituto Universitario de Oncología, Universidad de Oviedo, Oviedo, Spain.

Methods in Molecular Biology (Clifton, N.J.)
|April 21, 2009
PubMed
Summary

Researchers analyzed the complete protease repertoire (degradome) across mammalian species using genomic data and computational methods. This study reveals the complexity and evolution of these essential biological enzymes.

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Last Updated: Jun 23, 2026

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

  • Biochemistry
  • Genomics
  • Bioinformatics

Background:

  • Proteolytic enzymes are crucial for numerous biological and pathological functions.
  • Mammalian genome sequences are now widely available, enabling large-scale analysis.
  • Understanding protease systems is key to deciphering complex biological processes.

Purpose of the Study:

  • To annotate and compare the complete protease repertoire (degradome) across different mammalian species.
  • To investigate the complexity, evolution, and diversity of mammalian proteolytic systems.
  • To review the methodologies employed in degradomic analysis.

Main Methods:

  • Utilized computational approaches for genome-wide annotation.
  • Performed comparative analysis of degradomes from human, mouse, rat, and chimpanzee.
  • Leveraged newly available mammalian genome sequences.

Main Results:

  • Identified and characterized the complete repertoire of proteases in studied mammalian species.
  • Demonstrated that protease systems constitute approximately 2% of the analyzed genomes.
  • Revealed insights into the evolutionary relationships and diversity of protease families.

Conclusions:

  • Comparative degradomics provides a powerful framework for understanding protease systems.
  • The study expands knowledge on the evolution and diversity of mammalian proteolytic enzymes.
  • Genomic and computational strategies are effective for large-scale biological system analysis.