Bacteriophage T4 anticodon nuclease, polynucleotide kinase and RNA ligase reprocess the host lysine tRNA.

M. Amitsur, R. Levitz, G. Kaufmann

Research output: Contribution to journalArticle

182 Citations (Scopus)

Abstract

Host tRNAs cleaved near the anticodon occur specifically in T4-infected Escherichia coli prr strains which restrict polynucleotide kinase (pnk) or RNA ligase (rli) phage mutants. The cleavage products are transient with wt but accumulate in pnk- or rli- infections, implicating the affected enzymes in repair of the damaged tRNAs. Their roles in the pathway were elucidated by comparing the mutant infection intermediates with intact tRNA counterparts before or late in wt infection. Thus, the T4-induced anticodon nuclease cleaves lysine tRNA 5' to the wobble position, yielding 2':3'-P greater than and 5'-OH termini. Polynucleotide kinase converts them into a 3'-OH and 5' P pair joined in turn by RNA ligase. Presumably, lysine tRNA depletion, in the absence of polynucleotide kinase and RNA ligase mediated repair, underlies prr restriction. However, the nuclease, kinase and ligase may benefit T4 directly, by adapting levels or decoding specificities of host tRNAs to T4 codon usage.

Original languageEnglish (US)
Pages (from-to)2499-2503
Number of pages5
JournalEMBO Journal
Volume6
Issue number8
StatePublished - Aug 1987

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Polynucleotide 5'-Hydroxyl-Kinase
Bacteriophage T4
Bacteriophages
Ligases
Transfer RNA
Lysine
RNA
Repair
Infection
RNA Phages
Anticodon
Host Specificity
Codon
Escherichia coli
Decoding
anticodon nuclease
Phosphotransferases
Enzymes

ASJC Scopus subject areas

  • Cell Biology
  • Genetics

Cite this

Bacteriophage T4 anticodon nuclease, polynucleotide kinase and RNA ligase reprocess the host lysine tRNA. / Amitsur, M.; Levitz, R.; Kaufmann, G.

In: EMBO Journal, Vol. 6, No. 8, 08.1987, p. 2499-2503.

Research output: Contribution to journalArticle

Amitsur, M. ; Levitz, R. ; Kaufmann, G. / Bacteriophage T4 anticodon nuclease, polynucleotide kinase and RNA ligase reprocess the host lysine tRNA. In: EMBO Journal. 1987 ; Vol. 6, No. 8. pp. 2499-2503.
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