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  Structure of a bifunctional DNA primase-polymerase.

Lipps, G., Weinzierl, A. O., von Scheven, G., Buchen, C., & Cramer, P. (2004). Structure of a bifunctional DNA primase-polymerase. Nature Structural and Molecular Biology, 11(2), 157-162. doi:10.1038/nsmb723.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-8368-7 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-C560-6
Genre: Journal Article

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1940300.pdf (Publisher version), 2MB
 
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Lipps, G., Author
Weinzierl, A. O., Author
von Scheven, G., Author
Buchen, C., Author
Cramer, P.1, Author              
Affiliations:
1Department of Molecular Biology, MPI for Biophysical Chemistry, Max Planck Society, ou_1863498              

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 Abstract: Genome replication generally requires primases, which synthesize an initial oligonucleotide primer, and DNA polymerases, which elongate the primer. Primase and DNA polymerase activities are combined, however, in newly identified replicases from archaeal plasmids, such as pRN1 from Sulfolobus islandicus. Here we present a structure-function analysis of the pRN1 primase-polymerase (prim-pol) domain. The crystal structure shows a central depression lined by conserved residues. Mutations on one side of the depression reduce DNA affinity. On the opposite side of the depression cluster three acidic residues and a histidine, which are required for primase and DNA polymerase activity. One acidic residue binds a manganese ion, suggestive of a metal-dependent catalytic mechanism. The structure does not show any similarity to DNA polymerases, but is distantly related to archaeal and eukaryotic primases, with corresponding active-site residues. We propose that archaeal and eukaryotic primases and the prim-pol domain have a common evolutionary ancestor, a bifunctional replicase for small DNA genomes.

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Language(s): eng - English
 Dates: 2004-01-182004
 Publication Status: Published in print
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 Rev. Type: Peer
 Identifiers: DOI: 10.1038/nsmb723
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Title: Nature Structural and Molecular Biology
Source Genre: Journal
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Pages: - Volume / Issue: 11 (2) Sequence Number: - Start / End Page: 157 - 162 Identifier: -