Non-enveloped, head-tail structure. The capsid is about 60-65 nm in diameter, with a T=7 laevo icosahedral symmetry . The tail is non-contractile, has 6 prominent tail spikes.


Linear, dsDNA genome of about 41 kb encoding for at least 55 genes.




  1. Adsorption: the phage attaches to the target cell through its tail fibers.
  2. Ejection of the viral DNA into host cell cytoplasm.
  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

74 entries grouped by strain (browse by keywords)

All proteins are shown (view only 70 complete proteome entries)

65 entries

Salmonella phage P22 (Bacteriophage P22) reference strain

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ABC1_BPP22Anti-RecBCD protein 1 (Protein abc1)
ABC2_BPP22Anti-RecBCD protein 2 (Protein abc2)
CAPSD_BPP22Major capsid protein (Gene product 5) (gp5) (Major head protein)
ENLYS_BPP22Endolysin (EC (Lysis protein) (Lysozyme) (Muramidase)
ERF_BPP22Essential recombination function protein
EXLYS_BPP22Peptidoglycan hydrolase gp4 (Gene product 4) (Gp4) (Internal virion protein gp4)
FIBER_BPP22Tail spike protein (TSP) (Endo-1,3-alpha-L-rhamnosidase) (EC 3.2.1.-) ...
GTRA_BPP22Bactoprenol-linked glucose translocase
GTRB_BPP22Bactoprenol glucosyl transferase (EC 2.4.1.-)
HOLIN_BPP22Antiholin (Lysis inhibitor 13-108)
NEEDL_BPP22Tail needle protein gp26 (Head completion protein) (Packaged DNA stabilization ...
NINB_BPP22Protein ninB
NIND_BPP22Protein ninD
NINE_BPP22Protein ninE
NINF_BPP22Protein ninF
NING_BPP22Protein ninG
NINH_BPP22Protein ninH
NINX_BPP22Putative protein ninX
NINY_BPP22Putative protein ninY
PORTL_BPP22Portal protein (Gene product 1) (Gp1) (Head-to-tail connector)
RAL_BPP22Restriction inhibitor protein ral (Antirestriction protein)
RANT_BPP22Antirepressor protein ant
RARC_BPP22Transcriptional repressor arc
RCRO_BPP22Regulatory protein cro (Antirepressor)
REGN_BPP22Probable regulatory protein N
REGQ_BPP22Antitermination protein (Protein gp23)
RMNT_BPP22Regulatory protein mnt
RPC1_BPP22Transcriptional activator protein C1
RPC2_BPP22Repressor protein C2
RPC3_BPP22Regulatory protein C3 (CIII)
SIEA_BPP22Superinfection exclusion protein A
SIEB_BPP22Superinfection exclusion protein B
SPAN1_BPP22Probable spanin, inner membrane subunit (i-spanin) (Protein gp15)
TERL_BPP22Terminase, large subunit (EC 3.1.-.-) (DNA-packaging protein gp2) (Gene product ...
TERS_BPP22Terminase, small subunit (DNA-packaging protein gp3)
VARF_BPP22Accessory recombination function protein
VEAA_BPP22Eaa protein
VEAC_BPP22Eac protein
VEAD_BPP22Ead protein
VEAE_BPP22Eae protein
VEAF_BPP22Eaf protein
VEAG_BPP22Eag protein
VEAI_BPP22Eai protein
VG07_BPP22DNA transfer protein gp7
VG08_BPP22Scaffolding protein (Protein gp8)
VG10_BPP22Packaged DNA stabilization protein gp10
VG12_BPP22Replicative DNA helicase (EC (Replication protein gp12)
VG14_BPP22Protein gp14
VG16_BPP22DNA transfer protein gp16
VG17_BPP22Superinfection exclusion protein (Protein gp17)
VG18_BPP22DNA replication protein gp18
VG20_BPP22DNA transfer protein gp20
VINT_BPP22Integrase (EC 2.7.7.-) (EC 3.1.-.-)
VKIL_BPP22Protein kil
Y23K_BPP22Uncharacterized 22.8 kDa protein in gp15-gp3 intergenic region (ORF201)
Y55K_BPP22Uncharacterized 55.3 kDa protein in gtrB 5'region (ORF485)
Y6K4_BPP22Uncharacterized 6.4 kDa protein in sieA-mnt intergenic region (ORF59A)
Y6K6_BPP22Uncharacterized 6.6 kDa protein in eae-abc2 intergenic region (ORF56)
Y7K7_BPP22Uncharacterized 7.7 kDa protein in gp5-gp4 intergenic region (ORF 109) (ORF69)
Y7K8_BPP22Uncharacterized 7.8 kDa protein in ral-gp17 intergenic region (ORF67)
Y8K6_BPP22Uncharacterized 8.6 kDa protein in ral-gp17 intergenic region (ORF78)
Y9K0_BPP22Uncharacterized 9.0 kDa protein in gp15-gp3 intergenic region (ORF80)
YO48_BPP22Uncharacterized 5.8 kDa protein (ORF48)

4 entries

Shigella phage Sf6 (Shigella flexneri bacteriophage VI) (Bacteriophage SfVI) reference strain

VXIS_BPSFVProbable excisionase hkaC

2 entries

Salmonella phage HK620 (Bacteriophage HK620) reference strain

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VG07_BPHK6DNA transfer protein gp7
VXIS_BPHK6Probable excisionase hkaC

2 entries

Salmonella phage ST64T (Bacteriophage ST64T) reference strain

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DECO_BPST6Decoration protein (Dec)
VG07_BPST6DNA transfer protein gp7

65 entries

Salmonella phage P22 (Bacteriophage P22)

SPAN2_BPP22Probable spanin, outer lipoprotein subunit (o-spanin) (Rz1 protein)

4 entries

Shigella phage Sf6 (Shigella flexneri bacteriophage VI) (Bacteriophage SfVI)

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FIBER_BPSFVTail spike protein (TSP) (Endo-1,3-alpha-L-rhamnosidase) (EC 3.2.1.-) ...
OAC_BPSFVO-acetyl transferase (EC 2.3.1.-) (O-antigen acetylase)
VINT_BPSFVIntegrase (EC 2.7.7.-) (EC 3.1.-.-)

1 entry

Enterobacteria phage LP7 (Bacteriophage LP7)

TERS_BPLP7Terminase, small subunit (DNA-packaging protein gp3)