A group of actinophages ofFaenia rectivirgula

Preliminary Characterization of a Group of Actinophages of the Thermophilic Actinomycete Genus <i>Saccharomonospora</i>

“…This analysis re vealed that this set actually comprises only six different phages. In addition, the ge nomes of these six phages share a number of restriction fragments, indicating a close rela tionship between them [22]. This was sup ported by the following characterization, and the phages isolated in our laboratory [15] were given new systematic names, as shown in table 1.…”

Thermocrispum gen. nov., a New Genus of the Order Actinomycetales, and Description of Thermocrispum municipale sp. nov. and Thermocrispum agreste sp. nov.

“…Furthermore, the latter nine isolates formed three subgroups, as follows: (i) three of these strains were lysed by all five hages isolated for strains MKD8, MKD10, MKD19, MKD35 , and MKD38; (ii) two strains (TMS14 and MKD38) were not lysed by $10 even if high phage titers were used, and one strain (MKD35T) was lysed by this phage only if a high phage titer was used; and (iii) three strains (MKD10, MKD19, and MKD57) were sensitive to phages $35 and $38 only if high phage titers were used. These results also revealed the following problems that arise in phage typing studies: (i) more or less strong restriction barriers by some strains within a genus, as described previously for Succharopolysporu hirsutu and Sacchuropolyspora elythrueu (55,56) and some strains of Streptornyces coeZicoZor Miiller (53) and also found for MKD19 and CHB77T; (ii) occurrence of lysogeny in some strains and repression of homoimmune phages (55); and (iii) temperate phages that have the ability to lysogenize their hosts (22,54,56) (this property was also observed with phage $10, which lysogenized four of the isolates, MKD19, MKD35T, MKD57, and TMD78).…”

Distribution of Homologies among the Genomes of Several Actinophages of <i>Faenia</i> and <i>Saccharopolyspora</i> as Determined by DNA Hybridization

“…Hutchinson (Madison, Wise., USA): tpFRI14, tpFR113, and P517 [8]; tpFRb-B, tpFRb-D, tpFRv-J, and tpFRv-N [2]; and tpSaGl [9; Schneider et al, unpublished data].…”