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- porin, slr0042 gene product
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.23.2.1









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