Abstract |
We characterized UC-1, a previously undescribed Escherichia coli phage. UC-1 was observed to have an icosahedral head and a long, flexible, noncontractile tail: its genome consisted of linear double-stranded DNA having a molecular weight of 34 X 10(6). The product of the tonA gene served as at least part of the receptor for UC-1. E. coli tonA strains neither plated nor adsorbed UC-1 well, tonA mutants were selected on the basis of UC-1 resistance, and ferrichrome, a siderophore which utilizes TonA as its receptor, blocked infection. Restriction analyses, DNA- DNA hybridization experiments, and guanine-plus- cytosine determinations demonstrated that UC-1 DNA was unrelated to that of other phages (T1, T5, and phi 80) which employ TonA as a receptor. Also, mutants specifically resistant to UC-1 were isolated. UC-1 may be useful as a probe for investigating TonA, which functions as a receptor for more ligands than any other membrane protein. Study of the resistant mutants may improve our understanding of how phage DNA penetrates the cell envelope.
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Authors | M D Lundrigan, J H Lancaster, C F Earhart |
Journal | Journal of virology
(J Virol)
Vol. 45
Issue 2
Pg. 700-7
(Feb 1983)
ISSN: 0022-538X [Print] United States |
PMID | 6339736
(Publication Type: Comparative Study, Journal Article, Research Support, U.S. Gov't, Non-P.H.S., Research Support, U.S. Gov't, P.H.S.)
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Chemical References |
- DNA, Viral
- Peptides
- Receptors, Virus
- Viral Proteins
- Ferrichrome
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Topics |
- Coliphages
(analysis, isolation & purification, physiology)
- DNA, Viral
(genetics)
- Escherichia coli
- Ferrichrome
(pharmacology)
- Nucleic Acid Hybridization
- Peptides
(physiology)
- Receptors, Virus
(physiology)
- Viral Plaque Assay
- Viral Proteins
(analysis)
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