title: Genome analysis of the Clostridium difficile phage PhiCD6356, a temperate phage of the Siphoviridae family.
abstract: The temperate phages PhiCD6356 and PhiCD6365 were isolated and characterised following mitomycin C induction of 43 Clostridium difficile strains. Both phages belong to the Siphoviridae family and have genome sizes of 37,664 bp for PhiCD6356 based on sequence data and approximately 50 kb for PhiCD6365 based on restriction analysis. Protein analysis revealed similar protein profiles and indicated posttranslational processing of the PhiCD6356 major capsid protein. The genome sequence of PhiCD6356 is substantially different from other previously reported phage sequences and a putative function could be assigned to only 21 out of 59 predicted open reading frames. However, the genome organisation closely resembles that of other members of the Siphoviridae family which infect low GC-content Gram-positive bacteria. The modular organisation, genome synteny, presence of cohesive ends and posttranslational processing of the capsid protein suggest PhiCD6356 is a member of the proposed Sfi21-like genera. To our knowledge, this report represents the first C. difficile phage of the Siphoviridae family to be sequenced.
authors.affiliation: Teagasc, Moorepark Food Research Centre, Fermoy, Co. Cork, Ireland.
authors.forename: Marianne
authors.initials: M
authors.lastname: Horgan
authors.forename: Orla
authors.initials: O
authors.lastname: O'Sullivan
authors.forename: Aidan
authors.initials: A
authors.lastname: Coffey
authors.forename: Gerald F
authors.initials: GF
authors.lastname: Fitzgerald
authors.forename: Douwe
authors.initials: D
authors.lastname: van Sinderen
authors.forename: Olivia
authors.initials: O
authors.lastname: McAuliffe
authors.forename: R Paul
authors.initials: RP
authors.lastname: Ross
mesh_terms: D001435:Bacteriophages / Q000145:classification* / Q000235:genetics*; D001482:Base Composition / Q000235:genetics; D001483:Base Sequence; D016360:Clostridioides difficile / Q000145:classification / Q000235:genetics / Q000821:virology; D016678:Genome; D016366:Open Reading Frames; D017906:Siphoviridae / Q000145:classification / Q000235:genetics*; D026801:Synteny