DNA polymerase III beta subunit

The bacterial DNA polymerase III beta subunit (beta-clamp), and the corresponding eukaryotic and archaeal proliferating cell nuclear antigen (PCNA) are ring-shaped proteins that encircle double-stranded DNA. They act as processivity factors, or sliding clamps, for a wide variety of proteins that act on DNA including DNA polymerases, DNA ligase, endonucleases and glycosylases. We have determined the crystal structure of beta-clamp from D. radiodurans, and below you will find the link to the PDB ID of the structure and the abstract of the paper where the structure is described.

D. radiodurans DNA polymerase III beta subunit (beta-clamp) (Drbeta-clamp)