ATP Binding and ATPase Activities Associated with Recombinant Rabbit Hemorrhagic Disease Virus 2C-Like Polypeptide

Abstract
The carboxy-terminal region of the rabbit hemorrhagic disease virus p37 polyprotein cleavage product has been expressed in Escherichia coli as a glutathione S -transferase (GST) fusion protein. The recombinant GST-Δ2C protein showed in vitro ATP-binding and ATPase activities. Site-directed mutagenesis studies of the conserved residues G 522 and T 529 in motif A, D 566 and E 567 in motif B, and K 600 in motif C were also performed. These results provide the first experimental characterization of a 2C-like ATPase activity in a member of the Caliciviridae.