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Title: Interrupted thymidylate synthase gene of bacteriophages T2 and T6 and other potential self-splicing introns in the T-even bacteriophages

Abstract

Southern hybridization analyses of procaryotic DNA from Escherchia coli, lambda bacteriophage, and T1 to T7 phages were carried out. The hybridization probes used consisted of DNA restriction fragments derived from the T4 phage intron-containing thymidylate synthase gene (td) and short synthetic oligodeoxynucleotides defining specific exon and intron regions of the gene. It was shown that intact as well as restricted DNA from the T-even phages hybridized not only to both T4 phage td intron- and exon-specific probes but also to probes defining the td 5' (exon I-intron) and 3' (intron-exon II) presplice junctions. These data strongly suggest that, analogous to the T4 phage, only the T2 and T6 phages among the procaryotes tested contain interrupted td genes. The td intervening sequence in each phage is roughly 1 kilobase pair (kb) in size and interrupts the td gene at a site analogous to that in the T4 phage. This was confirmed by data from Northern (RNA) hybridization analysis of td-specific in vitro transcripts of these phage DNAs. (..cap alpha..-/sup 32/P)GTP in vitro labeling of total RNA from T4 phage-infected cells produced five species of labeled RNAs that were 1, 0.9, 0.83, 0.75, and 0.6 kb in size. Only the 1-, 0.9-,more » and 0.75-kb species were labeled in RNA from T2- or T6-infected cells. The commonly present 1-kb RNA is the excised td intron, which exists in both linear and circular forms in the respective T-even-phage-infected cells, while the 0.6-kb RNA unique to T4 may be the excised intron derived from the ribonucleotide reductase small subunit gene (nrdB) of the phage. The remaining labeled RNA species are likely candidates for other self-splicing introns.« less

Authors:
; ; ;
Publication Date:
Research Org.:
New York State Dept. of Health, Albany
OSTI Identifier:
6075653
Resource Type:
Journal Article
Journal Name:
J. Bacteriol.; (United States)
Additional Journal Information:
Journal Volume: 169:9
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; BACTERIOPHAGES; MOLECULAR BIOLOGY; METHYL TRANSFERASES; GENETIC MAPPING; DNA; DNA SEQUENCING; ESCHERICHIA COLI; HYBRIDIZATION; PHOSPHORUS 32; RNA; TRANSCRIPTION; BACTERIA; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; DAYS LIVING RADIOISOTOPES; ENZYMES; ISOTOPES; LIGHT NUCLEI; MAPPING; MICROORGANISMS; NUCLEI; NUCLEIC ACIDS; ODD-ODD NUCLEI; ORGANIC COMPOUNDS; PARASITES; PHOSPHORUS ISOTOPES; RADIOISOTOPES; STRUCTURAL CHEMICAL ANALYSIS; TRANSFERASES; VIRUSES; 550201* - Biochemistry- Tracer Techniques

Citation Formats

Chu, F K, Maley, F, Martinez, J, and Maley, G F. Interrupted thymidylate synthase gene of bacteriophages T2 and T6 and other potential self-splicing introns in the T-even bacteriophages. United States: N. p., 1987. Web.
Chu, F K, Maley, F, Martinez, J, & Maley, G F. Interrupted thymidylate synthase gene of bacteriophages T2 and T6 and other potential self-splicing introns in the T-even bacteriophages. United States.
Chu, F K, Maley, F, Martinez, J, and Maley, G F. Tue . "Interrupted thymidylate synthase gene of bacteriophages T2 and T6 and other potential self-splicing introns in the T-even bacteriophages". United States.
@article{osti_6075653,
title = {Interrupted thymidylate synthase gene of bacteriophages T2 and T6 and other potential self-splicing introns in the T-even bacteriophages},
author = {Chu, F K and Maley, F and Martinez, J and Maley, G F},
abstractNote = {Southern hybridization analyses of procaryotic DNA from Escherchia coli, lambda bacteriophage, and T1 to T7 phages were carried out. The hybridization probes used consisted of DNA restriction fragments derived from the T4 phage intron-containing thymidylate synthase gene (td) and short synthetic oligodeoxynucleotides defining specific exon and intron regions of the gene. It was shown that intact as well as restricted DNA from the T-even phages hybridized not only to both T4 phage td intron- and exon-specific probes but also to probes defining the td 5' (exon I-intron) and 3' (intron-exon II) presplice junctions. These data strongly suggest that, analogous to the T4 phage, only the T2 and T6 phages among the procaryotes tested contain interrupted td genes. The td intervening sequence in each phage is roughly 1 kilobase pair (kb) in size and interrupts the td gene at a site analogous to that in the T4 phage. This was confirmed by data from Northern (RNA) hybridization analysis of td-specific in vitro transcripts of these phage DNAs. (..cap alpha..-/sup 32/P)GTP in vitro labeling of total RNA from T4 phage-infected cells produced five species of labeled RNAs that were 1, 0.9, 0.83, 0.75, and 0.6 kb in size. Only the 1-, 0.9-, and 0.75-kb species were labeled in RNA from T2- or T6-infected cells. The commonly present 1-kb RNA is the excised td intron, which exists in both linear and circular forms in the respective T-even-phage-infected cells, while the 0.6-kb RNA unique to T4 may be the excised intron derived from the ribonucleotide reductase small subunit gene (nrdB) of the phage. The remaining labeled RNA species are likely candidates for other self-splicing introns.},
doi = {},
url = {https://www.osti.gov/biblio/6075653}, journal = {J. Bacteriol.; (United States)},
number = ,
volume = 169:9,
place = {United States},
year = {1987},
month = {9}
}