Molecular Chaperone Dynamics in Cancer Biology

Molecular chaperones are central regulators of protein quality control, ensuring correct folding, assembly and degradation of cellular proteins. In cancer biology, chaperone networks adapt to the heightened proteomic stress of malignant cells, stabilising mutated oncoproteins, preventing aggregation and buffering the effects of hypoxia or therapeutic insult. Key families such as Hsp70 and Hsp90 collaborate with co-chaperones to modulate client specificity and ATP-driven conformational cycles, thereby maintaining proteostasis under oncogenic pressure. Beyond canonical folding roles, chaperones influence signal transduction, apoptotic threshold, immune recognition and extracellular communication. Dysregulated chaperone dynamics can promote tumour cell survival, drive metastasis, confer resistance to chemotherapy and shape the tumour microenvironment. Understanding these dynamic processes at molecular and cellular levels has unveiled novel vulnerabilities—from disrupting chaperone–co-chaperone interfaces to targeting extracellular alarmins—offering promising strategies for anti-cancer intervention.

Research from Nature Portfolio

Recent studies have illuminated how mutations in the co-chaperone DNAJB6 disrupt its regulatory helical element, leading to unrestrained recruitment and hyperactivation of Hsp70. This gain-of-function mechanism depletes cellular Hsp70 reserves, undermines proteostasis and triggers pathological aggregation. Strikingly, targeted interference with the DNAJB6–Hsp70 interaction restores chaperone balance and reverses disease phenotypes, suggesting a therapeutic approach for tumours or disorders driven by chaperone hyperactivity.

Molecular Chaperone Dynamics in Cancer Biology publication trend

The graph below shows the total number of articles in molecular chaperone dynamics in cancer biology across all publications each year (not limited to Nature Index journals).

Technical terms

Molecular chaperone: A protein that assists the folding and stabilisation of other proteins without being part of the final structure.

Proteostasis: The maintenance of cellular protein homeostasis through coordinated synthesis, folding, and degradation mechanisms.

Co-chaperone: A protein that regulates the activity of a molecular chaperone, often by stimulating its ATPase activity or substrate specificity.

Nascent chain-associated complex (NAC): A ribosome-bound factor that shields emerging polypeptides and coordinates with chaperones to promote proper folding.

Allosteric regulation: Modulation of a protein’s activity through conformational changes induced by ligand or effector binding at a site distinct from the active site.

Alarmin: An endogenous molecule released by stressed or dying cells to activate immune or cellular repair responses.

Ribosomal tunnel exit: The site on the large ribosomal subunit where newly synthesised polypeptide chains emerge into the cytosol.

References

1. DNAJB6 mutants display toxic gain of function through unregulated interaction with Hsp70 chaperones. Nature Communications (2023).
2. NAC and Zuotin/Hsp70 chaperone systems coexist at the ribosome tunnel exit in vivo. Nucleic Acids Research (2024).
3. HSP70 binds to specific non-coding RNA and regulates human RNA polymerase III. Molecular Cell (2024).
4. Autocrine regulation of tumor cell repopulation by Hsp70-HMGB1 alarmin complex. Journal of Experimental & Clinical Cancer Research (2023).