Non-enveloped, head-tail structure. The head is about 60 nm in diameter. The tail is flexible, about 140 nm in length and 8 nm in width, with short brush-like terminal fibers.


Linear, dsDNA genome of about 46 kb with covalently closed hairpin ends, encoding about 60 proteins. The genome has cohesive ends (cos sites) .




  1. Adsorption: The phage attaches to target cell adhesion receptors through its tail fibers.
  2. Ejection of the viral DNA into host cell cytoplasm by long flexible tail ejection system.
  3. Genome circularization
  4. Protelomerase cuts at another site, giving rise to a linear plasmid
  5. Transcription and translation of early genes.
  6. Replication of genomic DNA by dsDNA bidirectional replication.
  7. Transcription and translation of late genes
  8. Assembly of an empty procapsid and packaging of the genome.
  9. Viral tail fiber assembly and viral tail assembly.
  10. Mature virions are released from the cell by lysis.

Matching UniProtKB/Swiss-Prot entries

(all links/actions below point to uniprot.org website)

26 entries grouped by strain

15 entries

Escherichia phage N15 (Bacteriophage N15) reference strain

G_BPN15 Tail assembly protein G (Gene product 14) (gp14) (Gene product G) (gpG) (Minor tail protein G) (Tail ...
TIPL_BPN15 Tail tip protein L (Gene product 18) (gp18)
TIPK_BPN15 Tail tip assembly protein K (Gene product 19) (gp19) (Probable endopeptidase) (EC 3.4.-.-) (Tail ...
ENLYS_BPN15 SAR-endolysin (EC (Endolysin) (Gene product 54) (gp54) (Lysis protein) (Lysozyme) ...
PORTL_BPN15 Portal protein [Cleaved into: Protein B*]
CAPSD_BPN15 Major capsid protein (Gene product 8) (Major head protein)
FII_BPN15 Head-tail joining protein (Gene product 10) (gp10)
COMPL_BPN15 Tail completion protein (Gene product 11) (gp11) (Tail connector protein) (Tail terminator protein)
TTTP_BPN15 Tail tube terminator protein (TrP) (Gene product 12) (gp12) (Tail-to-head joining protein) (THJP)
GT_BPN15 Tail assembly protein GT (Gene product 15) (gp15) (Gene product GT) (gpGT) (Minor tail protein GT)
TMP_BPN15 Tape measure protein (TMP) (Gene product 16) (gp16)
TIPM_BPN15 Tail tip protein M (Gene product 17) (gp17)
TIPI_BPN15 Tail tip assembly protein I (Gene product 20) (gp20)
DECO7_BPN15 Putative decoration protein (Gene product 7) (gp7)
VG55_BPN15 Protein gp55

11 entries

Enterobacteria phage phi80 (Bacteriophage phi-80)

VINT_BPPH8 Integrase (EC 2.7.7.-) (EC 3.1.-.-)
CAPSD_BPPH8 Major capsid protein (Gene product 5) (Gene product E) (Major head protein)
VXIS_BPPH8 Excisionase
VG15_BPPH8 Replication protein 15
RPC1_BPPH8 Repressor protein CI
COR_BPPH8 Adsorption-inhibiting cor protein
REGN_BPPH8 Probable regulatory protein N
VG14_BPPH8 Replication protein 14
VG30_BPPH8 Gene 30 protein
VG40_BPPH8 Protein 40A
RPC2_BPPH8 Regulatory protein CII