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Compared to the group I chaperonins, such as Escherichia coli GroEL, which facilitate protein folding, many aspects of the functional mechanism of archaeal group II chaperonins are unclear. Sequence homology between the chaperonin from Pyrococcus furiosus (PfCPN) and other group II chaperonins, together with the homo-oligomeric nature of PfCPN, suggest that PfCPN may serve as a model to clarify the...
To understand how molecular damage under harsh environmental conditions can be controlled, we investigated the properties of ATPase activity of the chaperonin molecular machinery from the hyperthermophilic archaeon Pyrococcus furiosus (PfCPN). PfCPN ATPase activity depended on K+ and Mg2+ and its optimal pH was 7.5. PfCPN had almost no ADPase activity. ADP strongly competitively inhibited PfCPN ATPase...
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