Replicative DNA polymerases achieve insertion fidelity by geometric selection of a complementary nucleotide followed by induced fit: movement of the fingers subdomain toward the active site to enclose the incoming and templating nucleotides generating a binding pocket for the nascent base pair. Several residues of motif B of DNA polymerases from families A and B, localized in the fingers subdomain, have been described to be involved in template/primer binding and dNTP selection. Here we complete the analysis …
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