Topic summary
Molecular chaperone
Extracted from the Wikipedia article Chaperone (protein).
Functions of molecular chaperones
Many chaperones are heat shock proteins, that is, proteins expressed in response to elevated temperatures or other cellular stresses. Heat shock protein chaperones are classified based on their observed molecular weights into Hsp60, Hsp70, Hsp90, Hsp104, and small Hsps. The Hsp60 family of protein chaperones are termed chaperonins, and are characterized by a stacked double-ring structure and are found in prokaryotes, in the cytosol of eukaryotes, and in mitochondria.