Proteostasis protein homeostasis describes how cells maintain the balance of protein synthesis, folding, transport, and degradation. This module helps you understand how this delicate choreography keeps cells healthy and responsive.

You begin by exploring how proteins are synthesised and folded. Molecular chaperones guide new polypeptides into their correct shapes, preventing misfolding and aggregation. The module shows how folding is an active, energy‑dependent process rather than a passive collapse.

You then explore degradation pathways. The ubiquitin–proteasome system tags damaged or unneeded proteins for removal, while autophagy handles larger structures and aggregates. You learn how these pathways maintain quality control and prevent toxic buildup.

The module also introduces stress responses such as the unfolded protein response (UPR), which activates when misfolded proteins accumulate. Clear diagrams help you understand how cells restore balance or trigger protective pathways.

By the end, proteostasis feels like a dynamic, finely tuned system essential for development, ageing, and disease prevention.

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