TCDB is operated by the Saier Lab Bioinformatics Group
TCIDNameDomainKingdom/PhylumProtein(s)
*1.B.3.1.1









LamB (MalL) maltoporin (maltose–maltoheptose).  Also catalyzes the uptake of antibiotics (Lin et al. 2014).

Bacteria
Proteobacteria
LamB of E. coli
*1.B.3.1.2









Oligosaccharide porin, ScrY (transports sucrose, raffinose and maltooligo-saccharides) (Kim et al. 2002).  The 3-d structure known (PDB ID 1A0S).  Sucrose translocation through the pore showed two main energy barriers within the constriction region of ScrY. Three asparate residues are key residues, opposing the passage of sucrose, all located within the L3 loop (Sun et al. 2016).

Bacteria
Proteobacteria
ScrY of Salmonella typhimurium
*1.B.3.1.3









Porin with specificity for β-glucosides, BglH of 538 aas.  High affinity binding was observed with the aromatic beta-D-glucosides arbutin and salicin as well as with gentibiose and cellobiose. Binding of maltooligosaccharides to BglH was much weaker, indicating that the binding site of BglH for carbohydrates is different from that of LamB (maltoporin) (Andersen et al. 1999).

Bacteria
Proteobacteria
BglH (YieC) of E. coli
*1.B.3.1.4









Maltoporin
Bacteria
Proteobacteria
LamB of Alteromonas sp.
*1.B.3.1.5









Outer membrane porin homologue

Bacteria
Proteobacteria
Omp of Glaciecola mesophila (K6YXR7)
*1.B.3.1.6









Putative outer membrane porin

Bacteria
Proteobacteria
Omp of Rheinheimera nanhaiensis (I1DXN7)
*1.B.3.1.7









Putative outer membrane porin

Bacteria
Aquificae
OMP of Aquifex aeolicus (O67300)
*1.B.3.1.8









Putative porin

Bacteria
Proteobacteria
Porin of Chromohalobacter salexigens
*1.B.3.1.9









Putative porin

Bacteria
Chlamydiae/Verrucomicrobia group
Porin of Verrucomicrobiae bacterium
*1.B.3.1.10









Uncharacterized protein

Bacteria
Nitrospirae
Putative porin of Candidatus Nitrospira defluvii
*1.B.3.1.11









Putative porin of 385 aas

Bacteria
Planctomycetes
Porin of Planctomycete KSU-1
*1.B.3.1.12









Putative porin of 447 aas

Bacteria
Chlamydiae/Verrucomicrobia group
PP of Pedosphaera parvula
*1.B.3.2.1









Putative porin of 411 aas

Bacteria
Chlamydiae/Verrucomicrobia group
PP of Opitutus terrae
*1.B.3.2.2









Putative porin of 397 aas

Bacteria
Proteobacteria
PP of Thioflavicoccus mobilis
*1.B.3.2.3









Putative porin of 401 aas

Bacteria
Proteobacteria
PP of Marinobacter aquaeolei (Marinobacter hydrocarbonoclasticus)
*1.B.3.3.1









Uncharacterized putative porin of 448 aas

Bacteria
Proteobacteria
UP of Bdellovibrio bacteriovorus