Abstract
The highly abundant and evolutionary conserved Hsp70 chaperones are central components of the cellular protein quality control system, surveilling the folding status of cellular proteins from birth at the ribosome to death through degradation. To no other chaperone families, more different functions have been assigned, and it is not surprising that Hsp70s are implicated in many developmental processes and pathological conditions. This versatility is due to the fact that Hsp70s bind tweezer-like degenerate motifs present in virtually all proteins, generally found in the hydrophobic core of the native conformation but exposed in the nascent state at the ribosome or translocation pores or upon stress-induced denaturation and aggregation. Recent years have seen much progress in understanding the molecular mechanism of this chaperone family. In this chapter, we review the current knowledge on structure, different conformational states, allostery, and regulation by co-chaperones in the context of Hsp70-substrate interaction.
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Abbreviations
- ER:
-
Endoplasmic reticulum
- Hsp:
-
Heat shock protein
- JDP:
-
J-domain protein, also called DnaJ proteins or Hsp40
- NBD:
-
Nucleotide-binding domain
- NEF:
-
Nucleotide exchange factor
- SBD:
-
Substrate-binding domain
- SBDα:
-
α-Helical lid subdomain of the SBD
- SBDβ:
-
β-Sandwich subdomain of the SBD
- UPR:
-
Unfolded protein response
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Kityk, R., Mayer, M.P. (2018). Hsp70-Substrate Interactions. In: Binder, R., Srivastava, P. (eds) Heat Shock Proteins in the Immune System. Springer, Cham. https://doi.org/10.1007/978-3-319-69042-1_1
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