Figure 1.
Model representing ATPase cycle of Hsp70. Binding of ATP to the NBD of Hsp70 opens the lid over the substrate-binding domain and allows substrate to bind. ATP hydrolysis, catalyzed by various co-chaperones leads to the closing of lid and trapping substrate in the substrate binding pocket. Further action of nucleotide exchange factors exchanges ADP with ATP that releases the bound substrate and a new cycle begins.