DNA polymerases are co-ordinated by sliding clamps (PCNA/beta-clamp) in translesion synthesis. It is unclear how these enzymes assemble on PCNA with geometric and functional compatibility. We report the crystal structure of a full-length Y-family polymerase, Dpo4, in complex with heterodimeric PCNA1-PCNA2 at 2.05 A resolution. Dpo4 exhibits an extended conformation that differs from the Dpo4 structures in apo- or DNA-bound form. Two hinges have been identified in Dpo4, which render the multid...Expand abstract
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Structural insight into recruitment of translesion DNA polymerase Dpo4 to sliding clamp PCNA.
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