TCDB is operated by the Saier Lab Bioinformatics Group
TCIDNameDomainKingdom/PhylumProtein(s)
*1.B.4.1.1









Fusion porin protein of 1115 aas with two domains that are homologous to members of family 1.B.4 at the N- and C-termini of this protein and a central domain homologous to members of family 1.B.13 proteins. These fusion proteins are found in several closely related species of α-proteobacteria such as those in the genuses, Methylosinus and Methylocystis (BL Reddy and MH Saier, unpublished observations).

Bacteria
Proteobacteria
Fusion porin protein of Methylosinus trichosporium
*1.B.4.1.2









Fusion porin protein of 840 aas with an N-terminal domain that is homologous to members of family 1.B.13, and a C-terminal domain that is homologous to members of family 1.B.4 proteins.  It is 60% identical to the last two domains in 1.B.4.2.15 but it lacks the N-terminal domain of that protein.

Bacteria
Proteobacteria
Fusion protein of Methylosinus trichosporium
*1.B.4.2.2









Uncharacterized porin homologue of 242 aas.  Shows similarity with 9.B.184.1.1 which also shows similarity with members of 1.B.6; it is likely to be a porin.

Bacteria
Proteobacteria
Putative porin of Bradyrhizobium sp. ORS 285
*1.B.4.2.3









Putative porin

Bacteria
Proteobacteria
Putative porin of Rhizobium sp. AP16
*1.B.4.2.4









Putative porin

Bacteria
Proteobacteria
Putative porin of Bradyrhizobium japonicum
*1.B.4.2.5









Putative porin of 252 aas

Bacteria
Proteobacteria
Porin of Bradyrhizobium sp.
*1.B.4.2.6









Porin of 252 aas

Bacteria
Proteobacteria
Porin of Xanthobacter autotrophicus
*1.B.4.2.7









Putative porin of 289 aas

Bacteria
Proteobacteria
Putative porin of Methylobacterium extorquens
*1.B.4.2.8









Porin of 241 aas

Bacteria
Proteobacteria
Porin of Nitrobacter winogradskyi
*1.B.4.2.9









Probable carbohydrate-selective outer membrane porin, OprB, of 302 aas (Brunen et al. 1991).

Bacteria
Proteobacteria
OMP of Acidovorax delafiedii
*1.B.4.2.10









Hypothetical protein of 259 aas

Bacteria
Proteobacteria
HP of Coxiella burnetii
*1.B.4.2.11









Putative porin of 200 aas

Bacteria
Proteobacteria
PP of Octadecabacter antarcticus
*1.B.4.2.12









Putative porin of 233 aas

Bacteria
Proteobacteria
PP of Azorhizobium caulinodans
*1.B.4.2.13









Porin of 240 aas

Bacteria
Proteobacteria
Porin of Brucella canis
*1.B.4.2.14









Putative porin of 199 aas

Bacteria
Proteobacteria
PP of Octadecabacter antarcticus
*1.B.4.2.15









Outer membrane immunogenic protein, Omp31
Bacteria
Proteobacteria
Omp31 of Brucella melitensis (Q45322)
*1.B.4.2.16









High affinity Mn2+ (but not Co2+ or Cu2+) porin, MnoP (675 aas) (Hohle et al., 2011).  This protein seems to be a fusion protein between an Omp_b-br1 family porin (N-terminus) and an OprB porin (C-terminus).  It shows little sequence similiarity with the OprB family proteins of 1.B.19.

Bacteria
Proteobacteria
MnoP of Bradyrhizobium japonicum (Q89Y60)
*1.B.4.2.17









Opacity protein of 188 aas

Bacteria
Proteobacteria
Opacity protein of Sphingomonas witichii
*1.B.4.2.18









Outer membrane porin, Omp25c, of 228 aas. The collective Th1 plus Th2 immune responses induced by Omp25c protects against Brucella infections (Paul et al. 2018).

Bacteria
Proteobacteria
Omp25c of Brucella abortus  
*1.B.4.2.19









RopB of 211 aas and 1 N-terminal TMS.  RopA (TC# 1.B.70.1.2) and RopB, which have β-barrel structures, may be involved in the control of plant-microbial symbiosis. Kosolapova et al. 2019 demonstrated that the full-length RopA and RopB proteins form amyloid fibrils in vitro. These fibrils are β-sheet-rich, bind Thioflavin T (ThT), exhibit green birefringence upon staining with Congo Red (CR), and resist treatment with ionic detergents and proteases. Heterologously expressed RopA and RopB intracellularly aggregate in yeast and assemble into amyloid fibrils at the surface of E. coli. The capsules of the R. leguminosarum cells bind CR, exhibit green birefringence, and contain fibrils of RopA and RopB in vivo (Kosolapova et al. 2019).

Bacteria
Proteobacteria
RopB of Rhizobium leguminosarum
*1.B.4.2.20









Omp25 porin of 213 aas. Omp25, LPS and peptidoglycan are incorporated at the new pole and the division site, the expected growth sites (Vassen et al. 2019).

Bacteria
Proteobacteria
Omp25 of Brucella abortus biovar 1