Phage | Order | Head-completion Ad | Head-completion Hc | Tail-completion Tc | Neck type |
---|
SPP1 |
Siphoviridae
|
gp15
1
|
gp16
2
|
gp17
3
| 1 |
Lambda |
Siphoviridae
|
gpW
|
gpFII
2
|
gpU
3
| 1 |
HK97 |
Siphoviridae
|
gp6
1
| gp7 | gp9* | 1 |
T4 |
Myoviridae
| gp13 | gp14 |
gp15
3
| 2 |
P22 |
Podoviridae
|
gp4
1
| gp10 | - | 3 |
Φ29 |
Podoviridae
| gp11 | - | - | 4 |
- *Refers to a protein identified through this study.
- Head- and tail-completion proteins extracted from the literature are listed in this table. Proteins of known 3D structure are indicated in bold. Structural homologies between proteins that were experimentally demonstrated are indicated by similar numbers in superscript. Neck types result from the current analysis. In particular, SPP1, λ and HK97 are gathered within the same phage type because they are predicted as exhibiting homologous head- and tail completion proteins. GpW of Siphoviridae phage λ corresponds to a rare alternative playing the role of SPP1 gp15 at the head-to-tail connection (although gpW and gp15 share no homology at the sequence and structural levels).