PMID:2120849
| Citation |
Baumstark, BR, Stovall, SR and Bralley, P (1990) The ImmC region of phage P1 codes for a gene whose product promotes lytic growth. Virology 179:217-27 |
|---|---|
| Abstract |
The ImmC region of the temperate bacteriophage P1 contains c1, a gene that codes for a repressor of lytic growth. Located in the region upstream of c1 are four open reading frames capable of coding for low-molecular-weight proteins. The efficiency of lysogeny by P1+Cm was found to be reduced by almost 10(5)-fold when the host cells carry this region of ImmC on a multicopy plasmid. The sequences responsible for interfering with lysogen formation were localized to one of the small open reading frames (orf4) within ImmC. Insertions and deletions within orf4 suppress the virulent phenotype of P1virC mutants when introduced into the phage by recombination. These virC-suppressed mutant phage were found to be incapable of lytic growth unless the product of orf4 is provided in trans. The presence of orf4 was observed to interfere with repression by the c1 protein of ImmC-encoded promoters fused to lacZ. For this reason, we suggest that orf4 corresponds to coi, a gene previously proposed to code for an inactivator of c1-mediated repression. |
| Links | |
| Keywords |
Amino Acid Sequence; Base Sequence; Chromosome Deletion; Coliphages/genetics; Coliphages/growth & development; Escherichia coli/genetics; Genes, Viral; Genetic Complementation Test; Lysogeny; Molecular Sequence Data; Mutagenesis, Site-Directed; Oligonucleotide Probes; Open Reading Frames; Plasmids; Transcription, Genetic; beta-Galactosidase/genetics; beta-Galactosidase/metabolism |
| edit table |
Significance
You can help EcoliWiki by summarizing why this paper is useful
Useful Materials and Methods
You can help Ecoliwiki by describing the useful materials (strains, plasmids, antibodies, etc) described in this paper.
Annotations
<annotationlinks/>
EcoliWiki Links
Add links to pages that link here (e.g. gene, product, method pages)
See also
References
See Help:References for how to manage references in EcoliWiki.