Primase is required for helicase activity and helicase alters the specificity of primase in the enteropathogen Clostridium difficile

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Primase is required for helicase activity and helicase alters the specificity of primase in the enteropathogen Clostridium difficile

DNA replication is an essential and conserved process in all domains of life and may serve as a target for the development of new antimicrobials. However, such developments are hindered by subtle mechanistic differences and limited understanding of DNA replication in pathogenic microorganisms. Clostridium difficile is the main cause of healthcare-associated diarrhoea and its DNA replication mac...

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Herpes simplex virus helicase-primase: the UL8 protein is not required for DNA-dependent ATPase and DNA helicase activities.

The herpes simplex virus type 1 helicase-primase complex consists of the products of the UL5, UL8 and UL52 genes. We have expressed these proteins in insect cells using baculovirus vectors and studied the requirements for enzymatic activities associated with the DNA unwinding function of the complex. In agreement with a recent report (Dodson, M.S., Crute, J.J., Bruckner, R.C. and Lehman, I.R. 1...

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An N-terminal fragment of the gene 4 helicase/primase of bacteriophage T7 retains primase activity in the absence of helicase activity.

Primase and helicase activities of bacteriophage T7 are present in a single polypeptide coded by gene 4. Because the amino terminal region of the gene 4 protein contributes to primase activity, we constructed a truncated gene 4 encoding the N-terminal 271-aa residues. The truncated protein, purified from cells overexpressing the protein, is a dimer in solution; the full-length protein is a hexa...

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Staphylococcus aureus helicase but not Escherichia coli helicase stimulates S. aureus primase activity and maintains initiation specificity.

Bacterial primases are essential for DNA replication due to their role in polymerizing the formation of short RNA primers repeatedly on the lagging-strand template and at least once on the leading-strand template. The ability of recombinant Staphylococcus aureus DnaG primase to utilize different single-stranded DNA templates was tested using oligonucleotides of the sequence 5'-CAGA (CA)5 XYZ (C...

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Interaction of adjacent primase domains within the hexameric gene 4 helicase-primase of bacteriophage T7.

The interaction of primase monomers within the hexameric gene 4 helicase-primase of bacteriophage T7 has been examined by using two genetically distinct gene 4 proteins. The T7 56-kDa gene 4 protein differs from the full-length 63-kDa protein in that it lacks the N-terminal zinc motif essential for the recognition of primase recognition sites. A second gene 4 protein, gp4-K122A, is unable to ca...

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ژورنال

عنوان ژورنال: Open Biology

سال: 2016

ISSN: 2046-2441

DOI: 10.1098/rsob.160272