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PMID:22977246

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Citation

'Kulczyk, AW, Akabayov, B, Lee, SJ, Bostina, M, Berkowitz, SA and Richardson, CC (2012) An Interaction between DNA Polymerase and Helicase is Essential for the High Processivity of the Bacteriophage T7 Replisome. J. Biol. Chem. '

Abstract

Synthesis of the leading DNA strand requires the coordinated activity of DNA polymerase and DNA helicase while synthesis of the lagging-strand involves interactions of these proteins with DNA primase. We present the first structural model of a bacteriophage T7 DNA helicase/DNA polymerase complex using a combination of SAXS, single-molecule and biochemical methods. We propose that the protein-protein interface stabilizing the leading-strand synthesis involves two distinct interactions: a stable binding of the helicase to the palm domain of the polymerase and an electrostatic binding of the C-terminal tail of the helicase to a basic patch on the polymerase. DNA primase facilitates binding of DNA helicase to ssDNA and contributes to formation of the DNA helicase/DNA polymerase complex by stabilizing DNA helicase.

Links

PubMed Online version:10.1074/jbc.M112.410647

Keywords


Significance

Annotations

Gene product Qualifier GO Term Evidence Code with/from Aspect Extension Notes Status


See also

References

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