Physical interaction between proliferating cell nuclear antigen and replication factor C from Pyrococcus furiosus.

Abstract:

Proliferating cell nuclear antigen (PCNA), which is recognized as a DNA polymerase processivity factor, has direct interactions with various proteins involved in the important genetic information processes in Eukarya. We determined the crystal structure of PCNA from the hyperthermophilic archaeon, Pyrococcus furiosus (PfuPCNA) at 2.1 A resolution, and found that the toroidal ring-shaped structure, which consists of homotrimeric molecules, is highly conserved between the Eukarya and Archaea. This allowed us to examine its interaction with the loading factor at the atomic level.

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