Non-enveloped, head-tail structure. The capsid is about 108 nm in diameter and has a T=16 symmetry . The tails is contractile, about 140 nm in length, with brushy tail fibers.


Linear, dsDNA genome of about 145 kb, encoding for approximately 200 proteins.


Genes are transcribed by operons.



  1. Adsorption: the phage attaches to the target cell through its tail fibers.
  2. Ejection of the viral DNA into host cell cytoplasm by contraction of the tail sheath.
  3. Transcription and translation of early genes.
  4. Replication of genomic DNA. Transcription and translation of late genes.
  5. Assembly of an empty procapsid and packaging of the genome.
  6. Viral tail fibers assembly and viral tail assembly.
  7. Mature virions are released from the cell by lysis.

Matching UniProtKB/Swiss-Prot entries

2 entries grouped by strain (browse by keywords)

Only complete proteome entries are shown (view all 36 entries)

2 entries

Bacillus phage SP01 (Bacteriophage SP01) reference strain

PORTL_BPSP1 Probable portal protein
TSP_BPSP1 Tail sheath protein (TSP)