Nonessential region of bacteriophage P4: DNA sequence, transcription, gene products, and functions.
We sequenced the leftmost 2,640 base pairs of bacteriophage P4 DNA, thus completing the sequence of the 11,627-base-pair P4 genome. The newly sequenced region encodes three nonessential genes, which are called gop, beta, and cII (in order, from left to right). The gop gene product kills Escherichia coli when the beta protein is absent; the gop and beta genes are transcribed rightward from the same promoter. The cII gene is transcribed leftward to a rho-independent terminator. Mutation of this terminator creates a temperature-sensitive phenotype, presumably owing to a defect in expression of the beta gene.
Dipartimento di Genetica e di Biologia dei Microrganismi, Università degli Studi di Milano, Italy.
D
D
Ghisotti
S
S
Finkel
C
C
Halling
G
G
Dehò
G
G
Sironi
R
R
Calendar
D000483:Alleles; D000595:Amino Acid Sequence; D001483:Base Sequence; D003090:Coliphages / Q000235:genetics*; D004279:DNA, Viral / Q000235:genetics*; D004926:Escherichia coli / Q000235:genetics*; D005814:Genes, Viral; D008969:Molecular Sequence Data; D010641:Phenotype; D010957:Plasmids; D011401:Promoter Regions, Genetic; D015183:Restriction Mapping; D013728:Terminator Regions, Genetic; D014158:Transcription, Genetic
D004279:DNA, Viral