A Coat Protein of the Bacteriophage M13 Virion Participates in Membrane-Oriented Synthesis of DNA
AUTOR(ES)
Jazwinski, S. Michal
RESUMO
Several molecules of a protein specified by gene 3 of M13 comprise a minor fraction of the phage coat and have been assigned a role in adsorption to the bacterial cell. We find that the gene-3 protein molecules of the virion are fully conserved in phage that have attached irreversibly to the host cell, and they form a complex with the phage DNA when it has been converted to a duplex replicative form. In cells infected at a restrictive temperature with a thermosensitive mutant in gene 3, there is no conversion of the phage DNA to the replicative form. Both the adsorbed phage and the complex of replicative form DNA with the gene-3 protein were isolated with the inner membrane fraction of the cell. We suggest that the gene-3 protein may perform an essential function in the synthesis of replicative form by linking the phage DNA to a cellular replicative system in or on the inner cell membrane.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=433216Documentos Relacionados
- Synthesis of phage M13 coat protein and its assembly into membranes in vitro.
- Procoat, the precursor of M13 coat protein, requires an electrochemical potential for membrane insertion.
- A clear-plaque mutation of bacteriophage M13 affects the regulation of viral DNA synthesis.
- Studies on the structure of replicative intermediates in bacteriophage M13 single stranded DNA synthesis.
- Replication of bacteriophage M13 IX. Requirement of the Escherichia coli dnaG function for M13 duplex DNA replication.