Lineage for Protein: Outer membrane cobalamin transporter BtuB
- Root: SCOP 1.71
Class f: Membrane and cell surface proteins and peptides [56835] (49 folds) 
Fold f.4: Transmembrane beta-barrels [56924] (6 superfamilies)
not a true fold, gathers together transmembrane barrels of different (n,S)
Superfamily f.4.3: Porins [56935] (4 families) 
Family f.4.3.3: Ligand-gated protein channel [56948] (4 proteins)
monomeric (22,24) barrel; ~150 N-terminal residues form a "plug" or "cork" subdomainProtein Outer membrane cobalamin transporter BtuB [90129] (1 species)
vitamin B12 receptor
Species:
Escherichia coli [TaxId:562] [90130] (5 PDB entries) - Domain for 1nqe:
Domain d1nqea_: 1nqe A: [86027]
complexed with c8e, mg
- Domain for 1nqf:
Domain d1nqfa_: 1nqf A: [86028]
complexed with c8e, mg, mse; mutant
- Domain for 1nqg:
Domain d1nqga_: 1nqg A: [86029]
complexed with c8e, ca
- Domain for 1nqh:
Domain d1nqha_: 1nqh A: [86030]
complexed with c8e, ca, cnc
- Domain for 1ujw:
Domain d1ujwa_: 1ujw A: [99471]
Other proteins in same PDB: d1ujwb_
complexed with colicin e3 receptor binding domain
complexed with gol, gp1, lda, lim, lin
- Domain for 1nqe:
More info for Protein Outer membrane cobalamin transporter BtuB from f.4.3.3: Ligand-gated protein channel
Timeline for Protein Outer membrane cobalamin transporter BtuB from f.4.3.3: Ligand-gated protein channel:
- Protein Outer membrane cobalamin transporter BtuB from f.4.3.3: Ligand-gated protein channel first appeared in SCOP 1.65
- Protein Outer membrane cobalamin transporter BtuB from f.4.3.3: Ligand-gated protein channel appears in SCOP 1.69
- Protein Outer membrane cobalamin transporter BtuB from f.4.3.3: Ligand-gated protein channel appears in SCOP 1.73
- Protein Outer membrane cobalamin transporter BtuB from f.4.3.3: Ligand-gated protein channel appears in the current release, SCOPe 2.08