TCDB is operated by the Saier Lab Bioinformatics Group
TCIDNameDomainKingdom/PhylumProtein(s)
1.B.23.1.1









SomA porin
Bacteria
Cyanobacteria
SomA of Synechococcus PCC 6301
1.B.23.1.2









Putative HCO3-/Fe+3 porin, slr0042 gene product of 576 aas (Qiu et al. 2018).

Bacteria
Cyanobacteria
Slr0042 of Synechocystis PCC6803
1.B.23.1.3









Major Omp, OmpM1

Bacteria
Firmicutes
OmpM1 of Selenomonas sputigena
1.B.23.1.4









Putative porin

Bacteria
Firmicutes
Putative porin of Thermosinus carboxydivorans
1.B.23.1.5









S-layer domain protein

Bacteria
Firmicutes
S-layer domain protein of Selenomonas noxia
1.B.23.1.6









Outer membrane porin homologue

Bacteria
Firmicutes
OMP homologue of Veillonella atypica (E1L471) 
1.B.23.1.7









Outer membrane porin homologue

Bacteria
Firmicutes
OMP homologue of Megasphaera micronuciformis (E2ZDM6)
1.B.23.1.8









Outer membrane porin homologue

Bacteria
Firmicutes
OMP of Anaeroglobus geminatus (G9YIN5)
1.B.23.1.9









Putative outer membrane porin

Bacteria
Cyanobacteria
OMP of Fischerella sp. JSC-11 (G6FN26)
1.B.23.1.10









Putative outer membrane porin

Bacteria
Firmicutes
OMP of Megasphaera elsdenii (G0VLV3)
1.B.23.1.11









Arginine/agmatine porin, AaxA (Smith and Graham 2008).

Bacteria
Chlamydiae/Verrucomicrobia group
AaxA of Chlamydia (Chlamydiophila) pneumoniae
1.B.23.1.12









OprB homologue of 430 aas

Bacteria
Aquificae
OprB homologue of Thermovibrio ammonificans
1.B.23.1.13









OprB homologue of 408 aas

Bacteria
Chlamydiae/Verrucomicrobia group
OprB homologue of Coraliomargarita akajimensis
1.B.23.1.14









OprB homologue

Bacteria
Nitrospirae
OprB homologue of Thermodesulfovibrio yellowstonii
1.B.23.1.15









OprB homologue of 435 aas

Bacteria
Fibrobacteres/Acidobacteria group
OprB homologue of Terriglobus saanensis
1.B.23.1.16









Putative porin, OprB, of 494 aas

Bacteria
Chlamydiae/Verrucomicrobia group
OprB of Akkermansia muciniphila
1.B.23.1.17









Putative porin of 488 aas

Bacteria
Proteobacteria
Putative porin of Magnetospirillum magneticum
1.B.23.1.18









Putative porin of 470 aas in the outer membrane of an atypical firmicute

Bacteria
Firmicutes
Putative porin of Megasphaera elsdenii
1.B.23.1.19









Putative porin

Bacteria
Planctomycetes
Porin of Candidatus Kuenenia stuttgartiensis
1.B.23.1.20









Putative porin of 500 aas

Bacteria
Synergistetes
Putative porin of Synergistes sp. 3_1_syn1
1.B.23.1.21









OprB of 415 aas

Bacteria
Chlamydiae/Verrucomicrobia group
OprB of Pedosphaera parvula
1.B.23.1.22









Carbohydrate-selective porin OprB of 405 aas

Bacteria
Chlamydiae/Verrucomicrobia group
OprB of Akkermansia muciniphila
1.B.23.1.23









Porin (residues 250 - 433) with an N-terminal S-layer domain, SLH, residues 1 - 250 (Kalmokoff et al. 2009).

Bacteria
Firmicutes
Outer membrane porin of Mitsuokella multacida
1.B.23.1.24









Major envelope protein, Mep45, of 432 aas and 1 N-terminal TMS.  Mep45 contains two distinct domains: an N-terminal S-layer homologous (SLH) domain that protrudes into the periplasm and binds to peptidoglycan, and the remaining C-terminal transmembrane domain that forms a non-selective pore able to transport molecules of <600 Da (Kojima et al. 2016). The estimated pore radius is 0.58 nm; truncation of the SLH domain does not affect the channel.

Bacteria
Firmicutes
Mep45 of Selenomonas ruminantium
1.B.23.1.25









Porin of 546 aas.  Capable of facilitating the uptake of ferric iron (Qiu et al. 2018).

Bacteria
Cyanobacteria
Porin of Synechocystis sp. strain PCC 6803
1.B.23.2.1









Putative porin

Bacteria
Fibrobacteres/Acidobacteria group
Putative porin of Holophaga foetida
1.B.23.2.2









Putative porin

Bacteria
Fibrobacteres/Acidobacteria group
Porin of Holophaga foetida
1.B.23.2.3









Putative porin

Bacteria
Fibrobacteres/Acidobacteria group
Porin of Holophaga foetida
1.B.23.3.1









Putative porin

Bacteria
Fibrobacteres/Acidobacteria group
Porin of Fibrobacter succinogenes
1.B.23.3.2









Putative porin

Bacteria
Fibrobacteres/Acidobacteria group
Porin of Fibrobacter succinogenes
1.B.23.3.3









Putative porin

Bacteria
Fibrobacteres/Acidobacteria group
Porin of Fibrobacter succinogenes
1.B.23.3.4









Putative porin of 371 aas

Bacteria
Fibrobacteres/Acidobacteria group
Porin of Fibrobacter succinogenes
1.B.23.4.1









Uncharacterized protein of 518 aas

Bacteria
Bacteroidetes/Chlorobi group
UP of Chloroherpeton thalassium
1.B.23.4.2









Uncharacterized protein of 704 aas with 23 putative β-strains and one N-terminal α-TMS.

Bacteria
Bacteroidetes/Chlorobi group
UP of Flavobacterium psychrophilum