Protein turnover Archives - Laboratory Notes

Proteolytic Cleavage of Protein

admin — Tue, 01 Sep 2026 07:38:09 +0000

Proteolytic cleavage is the enzymatic breakdown of protein peptide bonds by proteases. Explore proteolysis, protease classes, cleavage specificity, zymogen activation, protein degradation, detection, mass spectrometry, and applications.

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Protein Synthesis and Degradation

admin — Thu, 27 Aug 2026 15:52:23 +0000

Protein homeostasis is the process by which cells maintain a balance between protein synthesis and degradation. This balance is essential for protein quality, cellular function, growth, adaptation, and survival.

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K48‑Linked Ubiquitination

admin — Thu, 20 Aug 2026 22:13:18 +0000

K48‑linked ubiquitination is the principal degradation signal in eukaryotic cells, directing proteins to the 26S proteasome. Built by E1, E2 and E3 enzymes, K48‑linked chains regulate protein turnover, cell‑cycle progression and DNA‑damage responses, forming a central mechanism for maintaining proteostasis and preventing toxic protein accumulation.

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