Genus: Nitunavirus

Genus: Nitunavirus

Distinguishing features

Members of this genus infect Bacillus subtilis. The type species is Bacillus virus NIT1. Terminal repeats have been reported for some nitunavirus genomes. The unique sequence of the genome of the exemplar isolate of the type species is 153 kbp, containing terminal repeats of about 4 kbp, with 252 gene coding sequences as well as 3 encoded tRNAs. 


See discussion under family description.

Genome organisation and replication 

See discussion under family description.


Members of the genus infect Bacillus subtilis.

Derivation of names 

Nitunavirus: derived phonetically from the name of the exemplar isolate, Bacillus phage phiNIT1, of the type species (i.e. nit followed by una meaning one).

Species demarcation criteria

Members of the same species are more than 95% identical in genome nucleotide sequence, including the terminal repeat region. Phages with genomes that differ by more than 5% are assigned to different species.

Member species

Exemplar isolate of the species
SpeciesVirus nameIsolateAccession numberRefSeq numberAvailable sequenceVirus Abbrev.
Nitunavirus grassBacillus phage GrassKF669652NC_022771Complete genome
Nitunavirus NIT1Bacillus phage phiNIT1AP013029NC_021856Complete genome
Nitunavirus SPG24Bacillus phage SPG24AB930182NC_030903Complete genome

Virus names, the choice of exemplar isolates, and virus abbreviations, are not official ICTV designations.