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  The terminally redundant, nonpermuted genome of Listeria bacteriophage A511: a model for the SPO1-like myoviruses of gram-positive bacteria

Klumpp, J., Dorscht, J., Lurz, R., Bielmann, R., Wieland, M., Zimmer, M., et al. (2008). The terminally redundant, nonpermuted genome of Listeria bacteriophage A511: a model for the SPO1-like myoviruses of gram-positive bacteria. Journal of Bacteriology, 190(17), 5753-5765. doi:10.1128/JB.00461-08.

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Genre: Journal Article
Alternative Title : J Bacteriol

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Klumpp, Jochen, Author
Dorscht, Julia, Author
Lurz, Rudi1, Author
Bielmann, Regula, Author
Wieland, Matthias, Author
Zimmer, Markus, Author
Calendar, Richard, Author
Loessner, Martin J., Author
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1Max Planck Society, ou_persistent13              

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 Abstract: Only little information on a particular class of myoviruses, the SPO1-like bacteriophages infecting low-G+C-content, gram-positive host bacteria (Firmicutes), is available. We present the genome analysis and molecular characterization of the large, virulent, broad-host-range Listeria phage A511. A511 contains a unit (informational) genome of 134,494 bp, encompassing 190 putative open reading frames (ORFs) and 16 tRNA genes, organized in a modular fashion common among the Caudovirales. Electron microscopy, enzymatic fragmentation analyses, and sequencing revealed that the A511 DNA molecule contains linear terminal repeats of a total of 3,125 bp, encompassing nine small putative ORFs. This particular genome structure explains why A511 is unable to perform general transduction. A511 features significant sequence homologies to Listeria phage P100 and other morphologically related phages infecting Firmicutes such as Staphylococcus phage K and Lactobacillus phage LP65. Equivalent but more-extensive terminal repeats also exist in phages P100 (~6 kb) and K (~20 kb). High-resolution electron microscopy revealed, for the first time, the presence of long tail fibers organized in a sixfold symmetry in these viruses. Mass spectrometry-based peptide fingerprinting permitted assignment of individual proteins to A511 structural components. On the basis of the data available for A511 and relatives, we propose that SPO1-like myoviruses are characterized by (i) their infection of gram-positive, low-G+C-content bacteria; (ii) a wide host range within the host bacterial genus and a strictly virulent lifestyle; (iii) similar morphology, sequence relatedness, and collinearity of the phage genome organization; and (iv) large double-stranded DNA genomes featuring nonpermuted terminal repeats of various sizes.

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Language(s): eng - English
 Dates: 2008-09
 Publication Status: Published in print
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Title: Journal of Bacteriology
  Alternative Title : J Bacteriol
Source Genre: Journal
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Pages: - Volume / Issue: 190 (17) Sequence Number: - Start / End Page: 5753 - 5765 Identifier: ISSN: 0021-9193