Abstract
The nucleocapsid protein of HIV-1 consists of two basic amino acid regions and two zinc fingers. We investigated the requirement of these domains for the structural conversion of a 39mer RNA covering the dimerization initiation site by using three peptides; wild-type NCp7, a mutant in which the two zinc fingers are mutated, and another mutant in which the two zinc fingers are deleted. The two mutants exhibited similar conversion activities to each other, which were lower than that of the wild-type, indicating that the two basic regions exhibit some activity for RNA chaperone, as we suggested before, and the zinc fingers enhance the efficiency of this activity.
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