Non-enveloped, head-tail structure. The capsid is about 90 nm in diameter, with a T=13 icosahedral symmetry . It is composed of 11 pentamers at the vertices and 120 hexamers on the faces. The tail is about 160 nm in length and 9 nm in width, with a subterminal disk and 3 long kinked fibers (120 nm). There is also a conical tip with a single straight central fiber (50 nm).


Linear, dsDNA genome of about 121 kb, containing about 160 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 by long flexible tail ejection system: viral DNA is injected in host cell cytoplasm.
  4. Transcription and translation of early genes.
  5. Replication of genomic DNA by DNA strand displacement replication.
  6. Transcription and translation of late genes
  7. Assembly of an empty procapsid and packaging of the genome.
  8. Viral tail fibers assembly and viral tail assembly.
  9. Mature virions are released from the cell by lysis.

Matching UniProtKB/Swiss-Prot entries

45 entries grouped by strain (browse by keywords)

All proteins are shown (view only 43 complete proteome entries)

43 entries

Escherichia phage T5 (Enterobacteria phage T5) reference strain

Select_all Deselect_all  
A1_BPT5Protein A1
A2_BPT5Protein A2
BPPB3_BPT5Probable baseplate hub protein (BHP) (Tail protein pb3)
CAPSD_BPT5Major capsid protein (Capsid protein pb8) (Major head protein)
COMPL_BPT5Tail completion protein (Tail protein p143)
D14_BPT5Protein D14
D5_BPT5Putative transcription factor D5
DECO_BPT5Decoration protein (Capsid protein pb10)
DIT_BPT5Distal tail protein (Dit) (Tail protein pb9)
DMP_BPT55'-deoxynucleotidase (EC (Deoxynucleoside-5'-monophosphatase) ...
DNMK_BPT5Deoxynucleoside-5'-monophosphate kinase (EC
DPOL_BPT5DNA polymerase (EC (EC 3.1.11.-)
DUT_BPT5Deoxyuridine 5'-triphosphate nucleotidohydrolase (dUTPase) (EC (dUTP ...
ENDO1_BPT5Putative endonuclease (EC 3.1.-.-)
ENDO2_BPT5Putative endonuclease (EC 3.1.-.-)
ENDON_BPT5Nicking endonuclease (EC 3.1.21.-)
ENLYS_BPT5L-alanyl-D-glutamate peptidase (EC 3.4.24.-) (Endolysin) (Lysozyme)
EXO1_BPT5Probable exonuclease subunit 1 (EC 3.1.11.-) (D12)
EXO2_BPT5Probable exonuclease subunit 2 (EC 3.1.11.-) (D13)
EXO5_BPT5T5 flap endonuclease (T5FEN) (EC 3.1.11.-) (5'-3' exonuclease) ...
FIBC_BPT5Probable central straight fiber (Tail protein pb4)
FIBL1_BPT5L-shaped tail fiber protein pb1 (LTF) (EC 3.4.21.-) (Tail protein pb1)
FIBL2_BPT5L-shaped tail fiber protein p132
FRD_BPT5Dihydrofolate reductase (EC
HCP_BPT5Head completion protein (HCP)
HEL10_BPT5Probable helicase D10 (EC 3.6.4.-) (Protein D10)
LLP_BPT5Lytic conversion lipoprotein
OBP_BPT5Putative replication origin binding protein (D2 helicase)
PORTL_BPT5Portal protein (Capsid protein pb7)
PRO_BPT5Prohead protease (EC 3.4.21.-)
RBP5_BPT5Receptor-binding protein (RBP) (Tail protein pb5)
SSDNA_BPT5Probable ssDNA-binding protein (Protein D11)
TAIL1_BPT5Minor tail protein (Tail protein p140)
TERL_BPT5Terminase, large subunit (EC 3.1.-.-) (DNA-packaging protein)
TERS_BPT5Probable terminase, small subunit
TFLII_BPT5H-N-H endonuclease F-TflII (EC 3.1.21.-) (HNH endodeoxyribonuclease F-TflII) ...
TFLIV_BPT5H-N-H endonuclease F-TflIV (EC 3.1.21.-) (HNH endodeoxyribonuclease F-TflIV) ...
TFLI_BPT5H-N-H endonuclease F-TflI (EC 3.1.21.-) (HNH endodeoxyribonuclease F-TflI) (HNH ...
THY_BPT5Probable thymidylate synthase (EC
TMP_BPT5Probable tape measure protein (Tail protein pb2)
TTTP_BPT5Tail tube terminator protein (TrP) (Tail protein p142) (Tail-to-head joining ...
TUBE_BPT5Tail tube protein (TTP) (Tail protein pb6)

2 entries

Escherichia phage Bf23 (Enterobacteria phage BF23)

Select_all Deselect_all  
A2_BPBF2Protein A2-A3
Y9KD_BPBF2Uncharacterized 9.2 kDa protein