Autoproteolysis
Autoproteolysis — The self-cleavage of a protein or peptide by its own proteolytic activity, relevant to understanding enzyme activation and regulation.
What Is Autoproteolysis?
Autoproteolysis is the self-cleavage of a peptide or protein by its own proteolytic activity. It occurs in protease zymogens (inactive precursors that activate themselves), in some self-cleaving peptide motifs (inteins), and as an undesired degradation pathway when protease stock solutions degrade themselves during storage.
Examples
- Trypsin: Autodigests at Lys and Arg sites. Modified trypsin (methylated Lys) resists autoproteolysis
- Inteins: Self-cleaving protein elements used in expressed protein ligation for peptide semi-synthesis
- Pepsin: Activated from pepsinogen by acid-catalyzed autoproteolysis at pH < 5
Frequently Asked Questions
What is Autoproteolysis?
The self-cleavage of a protein or peptide by its own proteolytic activity, relevant to understanding enzyme activation and regulation.
Why is Autoproteolysis important in peptide research?
Autoproteolysis is a fundamental concept in biochemistry as it relates to peptide science. It directly influences experimental design, compound characterization, and the reliability of research outcomes across biochemistry and molecular biology disciplines.
Authority Sources
- Autoproteolysis on Wikipedia
- Search Autoproteolysis on PubChem (NIH)
- Research articles on ScienceDirect