Abstract
We have made a derivative of bacteriophage lambda that makes no OOP antisense RNA. The mutant phage carries a point mutation that inactivates the OOP promoter, po. The phages lambda + and lambda po- have identical plaque morphologies, one-step growth curves, and frequencies of lysogenization of a sensitive host. OOP RNA synthesis is weakly repressed by the Escherichia coli LexA protein. Consonant with this inducibility of OOP RNA synthesis by ultraviolet light, we find a two-fold greater phage burst following ultraviolet induction of a lambda + than of a lambda po- prophage. In lambda + infections, OOP RNA causes two cleavage events in cll mRNA: one is in the 3'-end of the coding region, and the second is in the intercistronic region between the cll and O genes. The cll gene fragments are subject to additional hydrolytic events, and cll mRNA levels are several-fold lower in lambda + than in lambda po- infections late in the infection cycle. However, O mRNA levels are almost unaffected by the po- mutation.
Publication types
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Research Support, U.S. Gov't, P.H.S.
MeSH terms
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Bacterial Proteins / metabolism
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Bacteriophage lambda / genetics*
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Bacteriophage lambda / growth & development
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Base Sequence
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Endoribonucleases / metabolism
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Escherichia coli / genetics
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Escherichia coli / metabolism
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Escherichia coli Proteins*
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Gene Expression Regulation, Viral* / radiation effects
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Genes, Viral*
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Lysogeny
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Molecular Sequence Data
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Promoter Regions, Genetic
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RNA Processing, Post-Transcriptional*
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RNA, Antisense / physiology*
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RNA, Messenger / metabolism
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RNA, Viral / metabolism
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Recombinant Fusion Proteins / metabolism
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Repressor Proteins / metabolism
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Ribonuclease III
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Serine Endopeptidases*
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Transcription Factors / biosynthesis
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Transcription Factors / genetics*
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Ultraviolet Rays
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Viral Proteins
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Viral Structural Proteins / genetics*
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Virus Activation
Substances
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Bacterial Proteins
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Escherichia coli Proteins
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LexA protein, Bacteria
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RNA, Antisense
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RNA, Messenger
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RNA, Viral
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Recombinant Fusion Proteins
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Repressor Proteins
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Transcription Factors
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Viral Proteins
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Viral Structural Proteins
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cII protein, bacteriophage lambda
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Endoribonucleases
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Ribonuclease III
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ribonuclease III, E coli
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Serine Endopeptidases