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. 1982 Aug;79(16):4937–4941. doi: 10.1073/pnas.79.16.4937

Nucleotide sequences involved in bacteriophage T4 gene 32 translational self-regulation.

H M Krisch, B Allet
PMCID: PMC346800  PMID: 6289325

Abstract

We have determined the nucleotide sequence of a cloned segment of the bacteriophage T4D chromosome, which contains the regulatory sequences and the structural gene (gene 32) for the single-stranded DNA binding protein (gp32). The amino acid sequence predicted by translation of the structural gene agrees well with that published for gp32 [Williams, K. R., Lo-Presti, M. B., Setoguchi, M. & Konigsberg, W. H. (1980) Proc. Natl. Acad. Sci. USA 77, 4614-4617]. To localize the nucleotide sequence involved in translational self-regulation of gene 32, we have constructed a series of plasmids in which gene 32 is fused to an amino-terminal deletion mutant of the beta-galactosidase gene of Escherichia coli. Expression of a beta-galactosidase fusion protein that contains only the first seven amino acids of gp32 is still repressed by gp32. The ribosomal binding site of gene 32 is flanked by a repetitive A+T-rich sequence. Preferential and cooperative binding of gp32 to this region of its mRNA could inhibit translation initiation and, thus, would account for the autoregulation.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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