Both are temperate

viruses possessing 38-43 kb genomes which lack integrase genes. While our proteomic analysis and the literature suggests that selleck chemicals llc Vibrio harveyi phage VHML [76, 77] should be included in this genus, there is no evidence that this phage can be propagated: it is only produced after induction, does not plaque, and must be considered a defective prophage. The data presented by Mobberley et al. [78] show that φHAP-1 exists as a linear prophage in lysogens and possesses a protelomerase (ORF34, YP_001686770.1) and a partitioning protein (ParA homolog, ORF33, YP_001686769.1) which are homologous to proteins encoded by VHML and VP882. While these viruses share some homology with the coliphage P2, this is largely restricted to the genes associated with tail morphogenesis V (gpV, W, J, I, H, G) and F operons (gpFI, FII, E, T, U, D). Based upon their radically different life cycle from the other Stem Cells inhibitor P2 phages, we have chosen not to include them in the Peduovirinae. Sepantronium concentration 5. Bzx1-like or I3-like viruses Myoviruses are exquisitely rare in the Actinobacteria (only an estimated 1% of all attempts to isolate phages from cultures was successful [79]). Phages I3, Bzx1 and Catera are characterized by heads of 80 nm in diameter and unusually short tails of 80 nm in length with a cup-shaped base plate. They do not resemble any other mycobacteriophages nor any other myovirus. We propose that this genus contains the following

eight Mycobacterium smegmatis bacteriophages: I3, Bxz1, Cali, Catera, Myrna, Rizal, ScottMcG and Spud. Phage I3, which has been the first to be described, is the type virus of the newly proposed myovirus genus although it has not yet been fully sequenced. Within this assemblage, we identified a distinct subtype which show >90% protein similarity much to Bxz1 (Cali, Catera, Rizal, ScottMcG and Spud) and genomes of 154-156 kb [80, 81]. Mycobacteriophage Myrna,

with a genome of 164 kb, shares approximately 45% of proteins with the Bxz1 subgroup phages. Interesting features include the presence of adenylosuccinate synthase homologs among the Bxz1 subgroup (gp250) and its absence in the genome of Myrna. The latter possesses several proteins not present in the Bxz1 group, including the large hypothetical proteins gp187 (YP_002225066.1) and gp243 (YP_002225120.1), a putative nicotinate phosphoribosyltransferase (gp263, YP_002225140.1) and ATP-dependent protease (gp262, YP_002225139.1). 6. phiCD119-like viruses These are all integrative temperate phages of Clostridium difficile with genomes ranging from 51-60 kb in size and a mol%G+C of 28.7-29.4 [82–84]. The genus is named after its first fully sequenced member. In each case, the electron micrographs are of poor quality [84, 85] or the measurements are very variable with large standard deviations [85]. Virus head diameters are given as 50-65 nm and tail lengths are said to range from 110 to 210 nm [82–84].