Viral genome ejection through host cell envelope (kw:KW-1171)

Tailed bacterial viruses possess are able to enter bacterias by piercing host envelope with their tail. The latter can be long and contractile (e.g. Myoviridae), long and flexible (e.g. Siphoviridae) or short(e.g. Podoviridae).

Delivery into the cell cytoplasm requires ejection of the viral genome from the icosahedral capsid through the tail tube and/or a channel .

Viral molecular biology Virion
Virus entry
Virus latency
Transcription and replication
Host-virus interactions
Virus exit

Ejection Short tail ejection system
Long flexible tail ejection system
Contractile tail ejection system

Links Uniprot Keyword: KW-1171
GO ontology:GO:0039678

Virus Podoviridae
Myoviridae
Siphoviridae
Long noncontractile tail machines of bacteriophages
Davidson AR, Cardarelli L, Pell LG, Radford DR, Maxwell KL
Adv Exp Med Biol. 2012;726:115-42

Microviridae

The bacteriophage T4 DNA injection machine
Rossmann MG, Mesyanzhinov VV, Arisaka F, Leiman PG
Curr Opin Struct Biol. 2004 Apr;14(2):171-80

Icosahedral bacteriophage phiX174 forms a tail for DNA transport during infection
Sun L1, Young LN2, Zhang X1, Boudko SP3, Fokine A4, Zbornik E4, Roznowski AP5, Molineux IJ6, Rossmann MG4, Fane BA
Nature. 2014 Jan 16;505(7483):432-5

Contractile tail machines of bacteriophages
Petr G Leiman, Mikhail M Shneider
Adv. Exp. Med. Biol. 2012; 726: 93-114

Short noncontractile tail machines: adsorption and DNA delivery by podoviruses
Casjens SR, Molineux IJ
Adv Exp Med Biol. 2012;726:143-79

A conformational switch in bacteriophage p22 portal protein primes genome injection
Zheng H, Olia AS, Gonen M, Andrews S, Cingolani G, Gonen T
Mol Cell. 2008 Feb 15;29(3):376-83

Channeling phage DNA through membranes: from in vivo to in vitro
Letellier L, Boulanger P, de Frutos M, Jacquot P
Res Microbiol. 2003 May;154(4):283-7

Matching UniProtKB/Swiss-Prot entries
(all links/actions below point to uniprot.org website)
145 entries grouped by strain

reorder by protein

7 entries

Escherichia phage lambda (Bacteriophage lambda) reference strain

PORTL_LAMBD Portal protein B (GpB) (Minor capsid protein B) [Cleaved into: Protein B*]

8K38; 8K39; 8XOT; 8XOU; 8XOW; 8XPM; 8XQB

TMP_LAMBD Tape measure protein (TMP) (Gene product H) (gpH) (Minor tail protein H) [Cleaved into: Entry ...

8IYK; 8IYL; 8K35

TIPL_LAMBD Tail tip protein L

8IYK; 8IYL; 8K35; 8XCG

TIPJ_LAMBD Tip attachment protein J (Central tail fiber) (Host specificity protein J) (gpJ protein)

8IYK; 8IYL; 8JVM; 8K35; 8XCG; 8XCI; 8XCJ; 8XCK

TTTP_LAMBD Tail tube terminator protein (TrP) (Gene product U) (gpU) (Minor tail protein U) (Tail ...

1Z1Z; 3FZ2; 3FZB; 8IYD; 8K37; 8XOW; 8XPM; 8XQB

TUBE_LAMBD Tail tube protein (TTP) (Gene product V) (gpV) (Major tail protein V)

2K4Q; 2L04; 6P3E; 7T2E; 7T4F; 8IYD; 8IYK; 8IYL; 8K35; 8K36; 8K37; 8KGE; 8XPM

TIPM_LAMBD Tail tip protein M

8IYK; 8IYL; 8K35; 8XCG

6 entries

Bacillus phage SPP1 (Bacteriophage SPP1) reference strain

TUBE_BPSPP Tail tube protein gp17.1* (TTP) (Gene product 17.1) (gp17.1) (Major tail protein) (MTP)

5A20; 5A21; 6YEG; 6YQ5

PORTL_BPSPP Portal protein (Gene product 6) (gp6) (Portal vertex protein)

2JES; 5A20; 5A21; 7Z4W

HCP16_BPSPP Head completion protein gp16 (Connector protein gp16) (Gene product 16) (Gp16) (Stopper protein ...

2KCA; 5A20; 5A21; 7Z4W

FIBER_BPSPP Tail spike protein (TSP) (Gene product 21) (Gp21)

DIT_BPSPP Distal tail protein (Dit) (Gene product 19.1) (Gp19.1)

2X8K

HCP15_BPSPP Head completion protein gp15 (HCP) (Connector protein gp15) (Gene product 15) (Gp15)

2KBZ; 5A20; 5A21; 7Z4W

6 entries

Escherichia phage T7 (Bacteriophage T7) reference strain

EXLYS_BPT7 Peptidoglycan transglycosylase gp16 (EC 4.2.2.n1) (Internal core protein gp16)

6YT5; 7EYB; 7K5C; 9JYY

GP15_BPT7 Internal virion protein gp15 (Gene product 15) (Gp15)

6YSZ; 6YT5; 7EYB; 7K5C; 8E4G; 9JYY

PORTL_BPT7 Portal protein (Gene product 8) (Gp8) (Head-to-tail connector)

3J4A; 6QWP; 6QX5; 6QXM; 6R21; 6TJP; 7BOU; 7BP0; 7EY6; 7EY8; 8E4G; 9JYZ; 9JZ0

GP14_BPT7 Internal virion protein gp14 (Gene product 14) (Gp14)

7EY7; 7EYB; 8E4G; 9JYY; 9JZ0

TUBE1_BPT7 Tail tubular protein gp11 (Gene product 11) (Gp11)

3J4B; 6R21; 7BOX; 7EY7; 7EY9; 8E4G; 9JYZ; 9JZ0

TUBE2_BPT7 Tail tubular protein gp12 (Gene product 12) (Gp12)

6R21; 7BOY; 7EY7; 7EY9; 8E4G; 9JYZ; 9JZ0

6 entries

Lactococcus phage SK1 (Lactococcus lactis bacteriophage SK1) reference strain

PORTL_BPLSK Probable portal protein (Gene product 4) (gp4) (Putative portal protein)

HCP1_BPLSK Probable head completion protein 1 (HCP1) (Connector protein gp8) (Putative connector protein gp8)

HCP2_BPLSK Probable head completion protein 2 (Connector protein gp9) (Gene product 9) (gp9) (Putative stopper ...

TUBE_BPLSK Tail tube protein (TTP) (Gene product 11) (gp11) (Major tail protein) (MTP)

DIT_BPLSK Distal tail protein (Dit) (Gene product 15) (Gp15)

GP16_BPLSK Baseplate protein gp16 (Exolysin) (Gene product 16) (Gp16) (Tail lysozyme-like) (Tail-associated ...

6 entries

Salmonella phage P22 (Bacteriophage P22) reference strain

PORTL_BPP22 Portal protein (Gene product 1) (Gp1) (Head-to-tail connector)

3LJ5; 4V4K; 5GAI; 5JJ1; 5JJ3; 8EAO; 8TVU; 8U10; 8U11; 9KYW

NEEDL_BPP22 Tail needle protein gp26 (Head completion protein) (Packaged DNA stabilization protein) (Tail ...

2POH; 3C9I; 4LIN; 4ZKP; 4ZKU; 4ZXQ; 8EAP

EXLYS_BPP22 Head-to-tail adapter protein gp4 (Gene product 4) (Gp4) (Internal virion protein gp4) (Peptidoglycan ...

4V4K; 5GAI; 8EAO; 8EB7; 8TVU; 8U10; 8U11

GP7_BPP22 Internal virion protein gp7 (Ejection protein gp7) (E protein gp7)

GP20_BPP22 Internal virion protein gp20 (Ejection protein gp20) (E protein gp20)

GP16_BPP22 Internal virion protein gp16 (Ejection protein gp16) (E protein gp16)

5 entries

Acyrthosiphon pisum secondary endosymbiont phage 1 (Bacteriophage APSE-1) reference strain

EXLYS_BPAPS Peptidoglycan hydrolase gp27 (Gene product 27) (Gp27) (Internal virion protein gp27)

PORTL_BPAPS Portal protein (Gene product 19) (Gp19) (Head-to-tail connector)

VP35_BPAPS Putative DNA transfer protein p35

VP33_BPAPS Putative DNA transfer protein p33

VP32_BPAPS Putative DNA transfer protein p32

5 entries

Escherichia phage Mu (Bacteriophage Mu) reference strain

BP45_BPMU Baseplate puncturing device gp45 (Baseplate spike protein) (Gene product 45) (gp45) (Gene product Q) ...

3VTN; 3VTO; 9KI1

BP44_BPMU Baseplate hub protein gp44 (43 kDa tail protein) (Gene product 44) (gp44) (Gene product P) (gpP)

1WRU; 9KI1

TSP_BPMU Tail sheath protein (TSP) (Gene product 39) (gp39) (Gene product L) (gpL)

9KHY; 9KI1; 9LJ8

TUBE_BPMU Tail tube protein (TTP) (Gene product 40) (gp40) (Gene product M) (gpM)

9KHY; 9KI1; 9LJ8

PORTL_BPMU Portal protein (Gene product 29) (gp29) (Gene product H) (gpH) (Head-tail connector)

9KHX; 9KNU

5 entries

Escherichia phage N15 (Bacteriophage N15) reference strain

TIPL_BPN15 Tail tip protein L (Gene product 18) (gp18)

PORTL_BPN15 Portal protein [Cleaved into: Protein B*]

TTTP_BPN15 Tail tube terminator protein (TrP) (Gene product 12) (gp12) (Tail-to-head joining protein) (THJP)

TMP_BPN15 Tape measure protein (TMP) (Gene product 16) (gp16)

TIPM_BPN15 Tail tip protein M (Gene product 17) (gp17)

4 entries

Bacillus phage phi29 (Bacteriophage phi-29) reference strain

PORTL_BPPH2 Portal protein (Connector protein) (Gene product 10) (gp10) (Gene product 19) (gp19) (Head-to-tail ...

1FOU; 1H5W; 1IJG; 1JNB; 6QX7; 6QYJ; 6QYM; 6QZ9; 6QZF

GP13_BPPH2 Morphogenesis protein 1 (Gene product 13) (gp13) (Protein p13) [Includes: Lysozyme-like glycosidase ...

3CSQ; 3CSR; 3CSZ; 3CT0; 3CT1; 3CT5

DIT9_BPPH2 Tail knob protein gp9 (Distal tube protein) (Gene product 9) (gp9) (Protein p9)

5FB4; 5FB5; 5FEI

TUB11_BPPH2 Proximal tail tube connector protein (Gene product 11) (gp11) (Lower collar protein) (Protein p11)

6QZ9; 6QZF

4 entries

Enterobacteria phage PRD1 (Bacteriophage PRD1) reference strain

EXLYS_BPPRD Transglycosylase (EC 4.2.2.n1) (Protein P7)

VP11_BPPRD Infectivity protein P11

VP18_BPPRD Protein P18 (GpM) (Protein M)

VP32_BPPRD Protein P32

4 entries

Enterobacteria phage T4 (Bacteriophage T4) reference strain

NEEDL_BPT4 Pre-baseplate central spike protein Gp5 (Pre-Gp5) (Peptidoglycan hydrolase gp5) (EC 3.2.1.17) ...

1K28; 1PDL; 1WTH; 2Z6B; 3A1M; 4JIV; 4JIW; 4JJ2; 4KU0; 4OSD; 5IV5; 6P1Z; 6P20; 6P22; 6P2A; 6XC0; 6XC1; 7CN7

PORTL_BPT4 Portal protein (Gene product 20) (gp20)

3JA7; 6UZC

TSP_BPT4 Tail sheath protein (TSP) (Gene product 18) (gp18)

3FO8; 3FOA; 3FOH; 3FOI; 3J2M; 3J2N

TUBE_BPT4 Tail tube protein gp19 (Gene product 19) (gp19)

5IV5; 5W5F

4 entries

Escherichia phage T5 (Enterobacteria phage T5) reference strain

TMP_BPT5 Tape measure protein pb2 precursor (TMP-pb2) (Pore-forming protein pb2) (Tail protein pb2) [Cleaved ...

7ZHJ; 7ZN2; 7ZQB; 7ZQP

PORTL_BPT5 Portal protein (Capsid protein pb7)

9ILP; 9IMV

TTTP_BPT5 Tail tube terminator protein p142 (TrP-142) (Tail protein p142) (Tail-to-head joining protein p142) ...

8BCP; 8BCU; 9ILV; 9IMH

TUBE_BPT5 Tail tube protein pb6 (TTP-pb6) (Major tail protein pb6) (MTP pb6) (Tail protein pb6)

5NGJ; 7QG9; 7ZHJ; 7ZN2; 7ZQB; 8BCP; 8BCU; 9INY

2 entries

Enterobacteria phage HK97 (Bacteriophage HK97) reference strain

GP6_BPHK7 Head completion protein gp6 (Connector protein gp6) (Gene product 6) (Gp6)

3JVO

GP7_BPHK7 Head completion protein gp7 (Connector protein gp7) (Gene product 7) (Gp7) (Stopper protein gp7)

3 entries

Enterobacteria phage S13 (Bacteriophage S13) reference strain

CAPSD_BPS13 Capsid protein F (F protein) (GPF)

G_BPS13 Major spike protein G (G protein) (GPG)

VGH_BPS13 Minor spike protein (H protein) (Pilot protein)

3 entries

Enterobacteria phage phiX174 (Isolate Sanger) (Bacteriophage phi-X174) reference strain

CAPSD_BPPHS Capsid protein F (F protein) (GPF)

1AL0; 1CD3; 1KVP; 2BPA

G_BPPHS Major spike protein G (G protein) (GPG)

1AL0; 1CD3; 2BPA

H_BPPHS Minor spike protein H (H protein) (Pilot protein)

4JPN; 4JPP

3 entries

Escherichia phage G4 (Bacteriophage G4) reference strain

CAPSD_BPG4 Capsid protein F (F protein) (GPF)

1GFF

G_BPG4 Major spike protein G (G protein) (GPG)

1GFF

VGH_BPG4 Minor spike protein (H protein) (Pilot protein)

3 entries

Escherichia phage P2 (Bacteriophage P2) reference strain

TSP_BPP2 Tail sheath protein (TSP) (Major tail sheath protein) (Protein FI)

TUBE_BPP2 Tail tube protein (TTP) (Protein FII)

PORTL_BPP2 Probable portal protein (GpQ)

3 entries

Escherichia phage alpha3 (Bacteriophage alpha-3) reference strain

VGH_BPAL3 Minor spike protein (H protein) (Pilot protein)

CAPSD_BPAL3 Capsid protein F (F protein) (GPF)

1M06; 1M0F; 1RB8

G_BPAL3 Major spike protein G (G protein) (GPG)

1M06; 1M0F; 1RB8

3 entries

Vibrio phage KVP40 (isolate Vibrio parahaemolyticus/Japan/Matsuzaki/1991) (KVP40) (Bacteriophage KVP40) reference strain

PORTL_BPKVM Portal protein (gp20)

TSP_BPKVM Tail sheath protein (TSP)

NEEDL_BPKVM Protein Gp5

2 entries

Bacillus phage SP01 (Bacteriophage SP01) reference strain

PORTL_BPSP1 Probable portal protein

TSP_BPSP1 Tail sheath protein (TSP)

2 entries

Bacteroides phage crAss001 (Bacteroides phage PhiCrAss001) reference strain

CARG1_BPCA1 Cargo protein 1 (C1) (Gene product 45) (gp45)

7QOG; 7QOI; 7QOJ; 7QOL; 8CKB

CARG2_BPCA1 Cargo protein 2 (Gene product 46) (gp46)

2 entries

Clostridium phage phiCD119 (strain Clostridium difficile/United States/Govind/2006) (Bacteriophage phiCD119) reference strain

TSP_BPPCD Tail sheath protein (TSP)

PORTL_BPPCD Portal protein (Portal vertex protein)

2 entries

Enterobacteria phage HK620 (Bacteriophage HK620) reference strain

NEEDL_BPHK6 Tail needle protein gp26 (Head completion protein) (Packaged DNA stabilization protein) (Tail ...

5BU5; 5BU8; 5BVZ

VG07_BPHK6 DNA transfer protein gp7

2 entries

Enterobacteria phage SP6 (Bacteriophage SP6) reference strain

EXLYS_BPSP6 Peptidoglycan hydrolase gp36 (Gene product 36) (Gp36)

PORTL_BPSP6 Portal protein (Head-to-tail connector)

2 entries

Pseudomonas phage phiKMV reference strain

EXLYS_BPKMV Peptidoglycan hydrolase gp36 (EC 3.2.1.17) (Gene product 36) (Gp36)

PORTL_BPKMV Portal protein (Head-to-tail connector)

2 entries

Salmonella phage ViI reference strain

PORTL_BPSAV Portal protein (gp20)

TSP_BPSAV Tail sheath protein (TSP)

2 entries

Staphylococcus phage Twort (strain DSM 17442 / HER 48) (Bacteriophage Twort) reference strain

TSP_BPTWO Tail sheath protein (TSP)

PORTL_BPTWO Probable portal protein

1 entry

Bacillus phage Nf (Bacteriophage Nf) reference strain

DIT9_BPNF Tail knob protein gp9 (Distal tube protein) (Gene product 9) (gp9) (Protein p9) (Tail protein)

1 entry

Bacillus phage SPR (Bacteriophage SPR) reference strain

TUBE_BPSPR Tail tube protein

8K98; 8WFN; 8WKS; 8WYA; 8WYB; 8WYC; 8XFF; 8YLN; 8Z18; 8ZC9; 8ZTR

1 entry

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

TMP_BPSPB Probable tape measure protein (TMP) (Transglycosylase) (EC 4.2.2.n1)

1 entry

Bdellovibrio phage phiMH2K (Bacteriophage phiMH2K) reference strain

H_BPPHM Minor spike protein H (H protein) (Pilot protein) (Protein VP2) (VP2)

1 entry

Bordetella phage BPP-1 reference strain

PORTL_BPBPP Probable portal protein (Gene product 21) (gp21) (Head-to-tail connector)

1 entry

Burkholderia phage BcepMu (isolate -/United States/Summer/2002) (Bacteriophage BcepMu) reference strain

TSP_BPBMU Tail sheath protein (TSP)

1 entry

Chlamydia phage 1 (Bacteriophage Chp1) reference strain

H_BPCHP Minor spike protein H (H protein) (Pilot protein) (Protein VP2) (VP2)

1 entry

Enterobacteria phage N4 (Bacteriophage N4) reference strain

PORTL_BPN4 Probable portal protein (94 kDa protein) (Gene product 59) (gp59) (Head-to-tail connector)

1 entry

Enterococcus phage phiEF24C (Enterococcus bacteriophage phi-EF24C) reference strain

PORTL_BPPHE Probable portal protein

1 entry

Escherichia phage T1 (Bacteriophage T1) reference strain

TMP_BPT1 Tape measure protein (TMP) (Gene product 38) (gp38)

9L9P

1 entry

Haemophilus phage HP1 (strain HP1c1) (Bacteriophage HP1) reference strain

PORTL_BPHC1 Probable portal protein (ORF15)

1 entry

Halomonas phage phiHAP-1 (isolate -/Gulf of Mexico/-/2001) (Bacteriophage phiHAP-1) reference strain

PORTL_BPHA1 Probable portal protein

1 entry

Helicobacter pylori bacteriophage KHP30 reference strain

PORTL_BPKHP Portal protein (Head-to-tail connector gp8) (Putative portal protein ORF17)

7WMP

1 entry

Mycobacterium phage Bxz1 (Mycobacteriophage Bxz1) reference strain

TSP_BPMBZ Tail sheath protein (TSP) (Gene product 124) (gp124)

1 entry

Mycobacterium phage D29 (Mycobacteriophage D29) reference strain

PORTL_BPMD2 Portal protein (Gene product 14) (gp14) (Portal vertex protein)

1 entry

Mycobacterium phage L5 (Mycobacteriophage L5) reference strain

PORTL_BPML5 Portal protein (Gene product 14) (gp14) (Portal vertex protein)

1 entry

Pseudomonas phage PAJU2 reference strain

TMP_BPPAJ Tape measure protein (TMP) (ORF10 protein) (Structural protein 1)

1 entry

Salmonella phage ST64T (Bacteriophage ST64T) reference strain

VG07_BPST6 DNA transfer protein gp7

1 entry

Salmonella phage epsilon15 reference strain

PORTL_BPE15 Portal protein (Head-to-tail connector)

1 entry

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

NEEDL_BPSFV Tail needle protein (Head completion protein) (Packaged DNA stabilization protein) (Tail accessory ...

3RWN

1 entry

Spiroplasma virus 4 (SpV4) reference strain

H_SPV4 Minor spike protein H (H protein) (Pilot protein)

1 entry

Staphylococcus phage 44AHJD reference strain

PORTL_BP44A Portal protein (Connector protein) (Gene product 19) (gp19) (Head-to-tail connector) (Probable ...

1 entry

Streptomyces phage phiC31 (Bacteriophage phi-C31) reference strain

PORTL_BPPHC Probable portal protein

6 entries

Lactococcus phage p2 (Lactococcus lactis bacteriophage p2)

GP16_BPLP2 Baseplate protein gp16 (Gene product 16) (Gp16) (Tail-associated lysine-like protein)

2WZP; 6ZIG; 6ZIH; 6ZJJ

DIT_BPLP2 Distal tail protein (Dit) (Gene product 15) (Gp15)

2WZP; 2X53; 6ZIG; 6ZIH; 6ZJJ

TUBE_BPLP2 Tail tube protein (TTP) (Gene product 11) (gp11) (Major tail protein) (MTP)

PORTL_BPLP2 Probable portal protein (Gene product 4) (gp4)

HCP1_BPLP2 Probable head completion protein 1 (HCP1) (Connector protein gp8)

HCP2_BPLP2 Probable head completion protein 2 (Connector protein gp9) (Gene product 9) (gp9) (Stopper protein ...

3 entries

Bacillus phage B103 (Bacteriophage B103)

DIT9_BPB03 Tail knob protein gp9 (Distal tube protein) (Gene product 9) (gp9) (Protein p9)

PORTL_BPB03 Portal protein (Gene product 10) (gp10) (Head-to-tail connector) (Upper collar protein)

TUB11_BPB03 Proximal tail tube connector protein (Gene product 11) (gp11) (Lower collar protein) (Protein p11)

3 entries

Bacillus phage PZA (Bacteriophage PZA)

PORTL_BPPZA Portal protein (Connector protein) (Gene product 10) (gp10) (Gene product 19) (gp19) (Head-to-tail ...

DIT9_BPPZA Tail knob protein gp9 (Distal tube protein) (Gene product 9) (gp9) (Protein p9)

TUB11_BPPZA Proximal tail tube connector protein (Gene product 11) (gp11) (Lower collar protein) (Protein p11)

1 entry

Enterobacteria phage HK97 (Bacteriophage HK97)

PORTL_BPHK7 Portal protein (GP3)

8CEZ; 8FQL

3 entries

Enterobacteria phage phiK (Bacteriophage phi-K)

G_BPPHK Major spike protein G (G protein) (GPG)

VGH_BPPHK Minor spike protein (H protein) (Pilot protein)

CAPSD_BPPHK Capsid protein F (F protein) (GPF)

2 entries

Serratia phage KSP20 (Serratia marcescens bacteriophage KSP20)

TAILC_BPSK2 Major tail tube protein (GpFII-like protein) (Virion protein C)

TSP_BPSK2 Major tail sheath protein (Virion protein A)

1 entry

Enterobacteria phage P21 (Bacteriophage 21) (Bacteriophage P21)

PORTL_BPP21 Portal protein B (GpB) (Minor capsid protein B)

1 entry

Enterobacteria phage T3 (Bacteriophage T3)

PORTL_BPT3 Portal protein (Gene product 8) (Gp8) (Head-to-tail connector)

1 entry

Enterobacteria phage T6 (Bacteriophage T6)

TUBE_BPT6 Tail tube protein gp19 (Gene product 19) (gp19)

1 entry

Escherichia phage SECphi27

TIPJ_BPS27 Tip attachment protein J (Central tail fiber) (CTF) (gpJ protein)

1 entry

Lactococcus phage F4-1 (Lactococcus lactis bacteriophage F4-1)

TUBE_BPF41 Tail tube protein (TTP) (Major tail protein) (MTP)

1 entry

Serratia phage KSP90 (Serratia marcescens bacteriophage KSP90)

TUBE_BPSK9 Tail tube protein (Virion protein F)