TCDB is operated by the Saier Lab Bioinformatics Group
TCIDNameDomainKingdom/PhylumProtein(s)
1.E.31.1.1









Lactococcus lactis phage Phi31 holin of the Holin SPP1 or Phage_holin family (Durmaz and Klaenhammer 2007).

Viruses
Heunggongvirae, Uroviricota
Holin of phage Phi31
1.E.31.1.2









Prophage L54a holin of the SPP1 family

Bacteria
Bacillota
Holin of Staphylococcus aureus
1.E.31.1.3









Holin of 74 aas and 2 TMSs

Bacteria
Bacillota
Holin of Bacillus pumilus
1.E.31.1.4









Holin

Bacteria
Bacillota
Holin of Streptococcus gallolyticus
1.E.31.1.5









Holin

Bacteria
Actinomycetota
Holin of Bifidobacterium calenulatum
1.E.31.1.6









Holin XhlB of 87 aas and 2 TMSs (Krogh et al. 1998; Babar et al. 2022).

Bacteria
Bacillota
Holin XhlB of Bacillus subtilis prophage PBSX
1.E.31.1.7









Bacteria
Bacillota
X[aG2 pf Bacillus licheniformis
1.E.31.1.8









Holin-like protein

Bacteria
Actinomycetota
Holin-like protein of Bifidobacterium longum
1.E.31.1.9









Putative holin

Viruses
Heunggongvirae, Uroviricota
Putative holin of Bacillus phage BPS13
1.E.31.1.10









Putative holin

Viruses
Heunggongvirae, Uroviricota
Putative holin of Brochithrix phage A9
1.E.31.1.11









XhlB holin of 109 aas; belongs to the SPP1 family.

Bacteria
Bacillota
XhlB of Staphylococcus epidermidis
1.E.31.1.12









XhlB holin of 87 aas and 2 TMSs (Aunpad and Panbangred 2012).

Bacteria
Bacillota
XhlB holin of Bacillus pumilus
1.E.31.1.13









Two component holin, requiring two non-homologous small proteins, the gene 26 product (O48472; 82 aas, 2 TMSs, a member of family TC# 1.E.31) and the gene 24.1 product (O48470; 83 aas; 1 C-terminal TMS, not homologous to members of family 1.E.31) (Fernandes and São-José 2017).

Viruses
Heunggongvirae, Uroviricota
Holin of Bacillus phage SPP1
Orf26
Orf24.1
1.E.31.1.14









Two component holin, requiring two non-homologous small proteins, one of 87 aas and 2 TMSs (E0U1U5), a member of family TC# 1.E.31, and another gene product, XhlA, of 89 aas with 1 C-terminal TMS (P39798), not homologous to members of family 1.E.31 (Fernandes and São-José 2017).

Bacteria
Bacillota
Holin of Bacillus phage PBSX
Orf of 87 aas and 2 TMSs (E0U1U5)
Orf of 89 aas and 1 C-terminal TMS (P39798)
1.E.31.1.15









Holin-like protein of 81 aas and 2 TMSs.  The holin and autolyin interact directly (Jin et al. 2013). 

Viruses
Heunggongvirae, Uroviricota
Holin of Geobacillus virus E3
1.E.31.1.16









Holin V of 99 aas and 2 TMSs. Its function as a holin protein was confirmed as its expression in E. coli impaired cell growth and viability while holV expression in B. thuringiensis led to bacterial lysis, which was enhanced by coexpressing the holin with its cognate endolysin (Leprince et al. 2022).

Viruses
HolV of Bacillus phage Vp4
1.E.31.2.1









Putative holin of 77 aas and 2 TMSs

Bacteria
Bacillota
Putative holin of Bacillus thuringiensis
1.E.31.2.2









Putative holin of 77 aas and 2 TMS

Bacteria
Bacillota
Putative holin of Bacillus cereus
1.E.31.2.3









Holin

Bacteria
Bacillota
Holin of Bacillus cereus
1.E.31.2.4









Putative holin

Bacteria
Bacillota
Putative holin of Brevibacterium laterosporus
1.E.31.3.1









Putative holin (Orf041) of Staphylococcal phage 2683

Viruses
Heunggongvirae, Uroviricota
Holin of Staphylococcus aureus phage 2683
1.E.31.3.2









Putative firmicute holin

Bacteria
Bacillota
Putative holin of Solibacillus silvestris