6deg
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Crystal structure of a DNA polymerase III subunit beta DnaN sliding clamp from Bartonella birtlesii LL-WM9
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Structural highlights
FunctionJ1IY24_9HYPH Confers DNA tethering and processivity to DNA polymerases and other proteins. Acts as a clamp, forming a ring around DNA (a reaction catalyzed by the clamp-loading complex) which diffuses in an ATP-independent manner freely and bidirectionally along dsDNA. Initially characterized for its ability to contact the catalytic subunit of DNA polymerase III (Pol III), a complex, multichain enzyme responsible for most of the replicative synthesis in bacteria; Pol III exhibits 3'-5' exonuclease proofreading activity. The beta chain is required for initiation of replication as well as for processivity of DNA replication.[PIRNR:PIRNR000804] See AlsoContents | ||||||||||||||||||
This page was last modified 14:33, 13 March 2024.