Non-enveloped, head-tail structure. The head is about 81 nm in diameter. The tail is relatively rigid, about 355 nm in length and 10 nm in width and possesses 6 club-shaped terminal fibers. There is no collar.


Linear, dsDNA genome of about 134 kb, containing about 187 genes.




  1. Adsorption: The phage attaches to target cell adhesion receptors through its tail fibers.
  2. Viral exolysin degrades host cell wall locally.
  3. Ejection of the viral DNA into host cell cytoplasm by long flexible tail ejection system.
  4. Transcription and translation of early genes.
  5. Replication of genomic DNA.
  6. Transcription and translation of late genes
  7. Assembly of an empty procapsid and packaging of the genome.
  8. Viral tail fiber assembly and viral tail assembly.
  9. Mature virions are released from the cell by lysis.

Matching UniProtKB/Swiss-Prot entries

24 entries grouped by strain (browse by keywords)

All proteins are shown (view only 23 complete proteome entries)

24 entries

Bacillus phage SPbeta (Bacillus phage SPBc2) (Bacteriophage SP-beta) reference strain

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53DR_BPSPB5'(3')-deoxyribonucleotidase (EC 3.1.3.-)
AIMP_BPSPBProtein AimP (YopL protein)
AIMR_BPSPBAimR transcriptional regulator (Arbitrium communication peptide receptor) (YopK ...
BDBA_BPSPBDisulfide bond formation protein A (Disulfide oxidoreductase A) ...
BDBB_BPSPBDisulfide bond formation protein B (Thiol-disulfide oxidoreductase B) ...
BHLA_BPSPBProtein bhlA
BHLB_BPSPBProtein bhlB
BNRDF_BPSPBRibonucleoside-diphosphate reductase subunit beta (EC (Ribonucleotide ...
DBH2_BPSPBDNA-binding protein HU 2
DPOL_BPSPBDNA-directed DNA polymerase (EC
NRDEB_BPSPBRibonucleoside-diphosphate reductase nrdEB subunit alpha (EC ...
NRDIB_BPSPBPhage protein nrdI (BnrdI)
SCP1_BPSPBStress response protein SCP1
SUNA_BPSPBBacteriocin sublancin-168
SUNI_BPSPBSublancin immunity protein sunI
SUNS_BPSPBGlycosyltransferase SunS (EC 2.4.1.-)
SUNT_BPSPBSublancin-168-processing and transport ATP-binding protein sunT (EC 3.4.22.-)
TMP_BPSPBProbable tape measure protein (TMP) (Transglycosylase) (EC 4.2.2.n1)
YOPN_BPSPBUncharacterized protein yopN
YOQW_BPSPBPutative SOS response-associated peptidase yoqW (EC 3.4.-.-)
YORK_BPSPBPutative single-strand DNA-specific exonuclease yorK (EC 3.1.-.-)
YOSQ_BPSPBPutative HNH homing endonuclease yosQ (EC 3.1.-.-)
YOSX_BPSPBUncharacterized protein yosX
IMMU_BPSPBImmunity protein