Crystal structure of a pol α family replication DNA polymerase from bacteriophage RB69

J. Wang, A. K.M.A. Sattar, C. C. Wang, J. D. Karam, W. H. Konigsberg, T. A. Steitz

Research output: Contribution to journalArticlepeer-review

414 Scopus citations

Abstract

The 2.8 Å resolution crystal structure of the bacteriophage RB69 gp43, a member of the eukaryotic pol α family of replicative DNA polymerases, shares some similarities with other polymerases but shows many differences. Although its palm domain has the same topology as other polymerases, except rat DNA polymerase β, one of the three carboxylates required for nucleotidyl transfer is located on a different β strand. The structures of the fingers and thumb domains are unrelated to all other known polymerase structures. The editing 3′-5′ exonuclease domain of gp43 is homologous to that of E. coli DNA polymerase I but lies on the opposite side of the polymerase active site. An extended structure-based alignment of eukaryotic DNA polymerase sequences provides structural insights that should be applicable to most eukaryotic DNA polymerases.

Original languageEnglish
Pages (from-to)1087-1099
Number of pages13
JournalCell
Volume89
Issue number7
DOIs
StatePublished - 1997

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