Chemical stability of bacteriophage T7 early mRNA

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Chemical stability of bacteriophage T7 early mRNA.

T7 early mRNA produced by a gene 1 amber mutant phage, T7 am27, is chemically stable interms of acid insolubility and T7 DNA hybridizability. However, the messenger activity of individual T7 early mRNA species, transcripts of gene 1, gene 0.7, and gene 1.3, decay with a half-life of about 6.5 min at 30 C. An extensive secondary structure is present in all T7 early mRNA species and is probably r...

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Chemical analysis of the T7 bacteriophage of Escherichia coli.

Chemical analyses have been made of several bacteriophages (l-9) in more or less purified preparations. However, only a few, the T:, (G-8) and, more recently, the Te (9) bacteriophages of Escherichia coli, have been studied in sufficient detail for comparison with analogous studies on plant and animal viruses. The results obtained on the bacteriophages thus far examined have shown that, while t...

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Refactoring bacteriophage T7

Natural biological systems are selected by evolution to continue to exist and evolve. Evolution likely gives rise to complicated systems that are difficult to understand and manipulate. Here, we redesign the genome of a natural biological system, bacteriophage T7, in order to specify an engineered surrogate that, if viable, would be easier to study and extend. Our initial design goals were to p...

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Flap endonuclease of bacteriophage T7

Gene 6 protein of bacteriophage T7 has 5'-3'-exonuclease activity specific for duplex DNA. We have found that gene 6 protein also has flap endonuclease activity. The flap endonuclease activity is considerably weaker than the exonuclease activity. Unlike the human homolog of gene 6 protein, the flap endonuclease activity of gene 6 protein is dependent on the length of the 5'-flap. This dependenc...

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Superinfection exclusion by bacteriophage T7.

Only two of the early genes of bacteriophage T7 were found to play a significant role in exclusion of superinfecting bacteriophage T3 particles; genes 0.3 and 1. Protein synthesis by the preinfecting phage particle was not required for efficient exclusion. These findings are discussed with regard to the known functions of these genes during T7 development.

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ژورنال

عنوان ژورنال: Journal of Virology

سال: 1975

ISSN: 0022-538X,1098-5514

DOI: 10.1128/jvi.16.6.1683-1687.1975