Characteristics of two myoviruses induced from the coastal photoheterotrophic bacterium Porphyrobacter sp. YT40.
FEMS Microbiol Lett
; 366(23)2019 12 01.
Article
en En
| MEDLINE
| ID: mdl-31977007
ABSTRACT
In this study, we characterized two induced myoviruses from one marine photoheterotrophic bacterium Porphyrobacter sp. YT40 belonging to the Sphingomonadales family in Alphaproteobacteria. The genome sequence of prophage A is â¼36.9 kb with an average GC content of 67.1%, and its core or functional genes are homologous to Mu or Mu-like phages. Furthermore, induced viral particles from prophage A show a knob-like neck structure, which is only found in bacteriophage Mu. The genome size of prophage B is â¼36.8 kb with an average GC content of 65.3%. Prophage B contains a conserved gene cluster Q-P-O-N-M-L, which is unique in P2 phages. Induced viral particles from prophage B display an icosahedral head with a diameter of â¼55 nm and a 130 ± 5 nm long contractile tail. To our knowledge, this is the first report that characterizes the induced P2-like phage in marine Alphaproteobacteria. Phylogeny analyses suggest that these two types of prophages are commonly found in sequenced bacteria of the Sphingomonadales family. This study sheds light on the ongoing interaction between marine bacteria and phages, and improves our understanding of bacterial genomic plasticity and evolution.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Microbiología del Agua
/
Myoviridae
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Alphaproteobacteria
Idioma:
En
Revista:
FEMS Microbiol Lett
Año:
2019
Tipo del documento:
Article