TCDB is operated by the Saier Lab Bioinformatics Group
TCIDNameDomainKingdom/PhylumProtein(s)
1.B.5.1.1









Outer membrane phosphate-selective porin OprP (PorP) of 440 aas.  Binds and transports a variety of mono, di- and trivalent anions (Benz et al. 1993).  An arginine in the pore determines the anion selectivity (Modi et al. 2013).  Residues involved in anion affinity and a preference for Pi versus P2 have been identified (Modi et al. 2015).  Both monomeric and trimeric OprP are belived to maintain their anion selectivity (Niramitranon et al. 2016). The phosphonic-acid antibiotic fosfomycin is highly permeable through the OprO and OprP channels (Citak et al. 2018).

Bacteria
Pseudomonadota
OprP of Pseudomonas aeruginosa
1.B.5.1.2









Pyrophosphate-selective porin OprO (Hancock et al. 1992).  The residue basis for the selectivity of P2 over Pi has been determined and involves two residues (Modi et al. 2015).  The phosphonic-acid antibiotic fosfomycin is highly permeable through the OprO and OprP channels (Citak et al. 2018). Fosfidomycin is also transported (Lapierre and Hub 2023).

Bacteria
Pseudomonadota
OprO of Pseudomonas aeruginosa
1.B.5.1.3









Outer membrane porin, OprP

Bacteria
Planctomycetota
OprP of Rhodopirellula baltica
1.B.5.1.4









Outer membrane putative phosphate-specific porin, OprP

Bacteria
Proteobacteria
OprP of Pseudoalteromonas atlantica
1.B.5.1.5









Putative outer membrane porin

Bacteria
Bacteroidota
OMP of Capnocytophaga ochracea
1.B.5.1.6









Putative outer membrane porin

Bacteria
Bacteroidota
OMP of Bacteroides helcogenes
1.B.5.1.7









Putative phosphate-specific porin

Bacteria
Planctomycetota
OMP of Singulisphaera acidiphila
1.B.5.1.8









Putative porin O

Bacteria
Verrucomicrobiota
Porin O of Coraliomargarita akajimensis
1.B.5.1.9









Porin O

Bacteria
Pseudomonadota
Porin O of Shewanella violacea
1.B.5.1.10









Putative polyphosphate porin, OprO

Bacteria
Planctomycetota
OprO of Rhodopirellula baltica
1.B.5.1.11









Phosphate-selective porin OmpO/P of 412 aas

Bacteria
Verrucomicrobiota
OmpO/P of Verrucomicrobiae bacterium
1.B.5.1.12









Anion-selective porin O/P

Bacteria
Rhodothermota
Porin O/P of Salinibacter ruber
1.B.5.1.13









Anion-selective porin O/P

Bacteria
Rhodothermota
Porin O/P of Salinibacter ruber
1.B.5.1.14









Porin of 627 aas with an N-terminal domain of about 140 aas that is recognized by CDD as a tumor supressor myostatin domain (Pfam 13868).

Bacteria
Pseudomonadota
Porin fusion protein of Gluconobacter morbifer
1.B.5.1.15









Phosphate/pyrophosphate-specific porin of 625 aas, OprP/OprO/OprD.

Bacteria
Pseudomonadota
OprD/O/P of Methylophaga aminisulfidivorans
1.B.5.2.1









Putative porin

Bacteria
Pseudomonadota
Putative porin of Sideroxydans lithotrophicus
1.B.5.2.2









Putative porin

Bacteria
Aquificota
Porin of Thermocrinis albus