TCDB is operated by the Saier Lab Bioinformatics Group
TCIDNameDomainKingdom/PhylumProtein(s)
*1.W.2.1.1









Phage T5 portal protein of 403 aas (Huet et al. 2016). It forms the portal vertex of the capsid and plays a role in governing correct capsid geometry. This portal plays critical roles in capsid assembly, genome packaging, head completion protein attachment, and genome ejection. The portal protein multimerizes as a single ring-shaped homododecamer arranged around a central channel (By similarity). It binds to the terminase subunits to form the packaging machine (Huet et al. 2016).

Viruses
Caudovirales
Portal protein of E. coli bacteriophage T5
*1.W.2.1.2









Phage portal protein of 426 aas.  The third gene upstream from the protease gene encodes the portal protein for phage HK97. The presence of the portal protein is not required for assembly of the capsid protein in this system (Duda et al. 1995).

Bacteria
Proteobacteria
PPP of Vibrio parahaemolyticus phage HK97
*1.W.2.1.3









Phage portal protein of 416 aa

Bacteria
Firmicutes
PPP of Clostridium botulinum
*1.W.2.1.4









Uncharacterized protein of 414 aas

Bacteria
Armatimonadetes
UP of Armatimonadetes bacterium CP1_7O (hot springs metagenome)
*1.W.2.1.5









Phage portal protein of 469 aa

Bacteria
Actinobacteria
PPP of Bifidobacterium longum
*1.W.2.1.6









HK97 family phage portal protein of 418 aa

Bacteria
Fusobacteria
PPP of Fusobacterium nucleatum
*1.W.2.1.7









Phage portal protein of 433 aa

Bacteria
Chlorobi
PPP of Chlorobi bacterium OLB5
*1.W.2.1.8









Uncharacterized protein of 455 aas

Bacteria
Proteobacteria
UP of Sulfuricurvum sp. MLSB (wastewater metagenome)
*1.W.2.1.9









Uncharacterized protein sk1p04 of 378 aas

Viruses
Caudovirales
UP of Lactococcus virus sk1