8BLW

Vitamin B12 transporter BtuB1 with lipoprotein BtuG1 from B. theta

External Resource: Annotation

Domain Annotation: ECOD Classification
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF00593	e8blwA2	A: beta barrels	X: Outer membrane meander beta-barrels	H: Porins	T: Ligand-gated protein channel	F: PF00593	ECOD (1.6)
A	PF07715	e8blwA1	A: a+b complex topology	X: N0 domain in phage tail proteins and secretins-like	H: TonB-dependent receptor plug domain (From Topology)	T: TonB-dependent receptor plug domain	F: PF07715	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00593	TonB dependent receptor-like, beta-barrel (TonB_dep_Rec_b-barrel)	TonB dependent receptor-like, beta-barrel	This entry represents the beta-barrel domain of TonB-dependent receptors, such as BtuB, CirA, FatA, FcuT, FecA, FepA, among others [1].	Domain
A	PF07715	TonB-dependent Receptor Plug Domain (Plug)	TonB-dependent Receptor Plug Domain	The Plug domain has been shown to be an independently folding subunit of the TonB-dependent receptors ([1]). It acts as the channel gate, blocking the pore until the channel is bound by ligand. At this point it under goes conformational changes opens ...	The Plug domain has been shown to be an independently folding subunit of the TonB-dependent receptors ([1]). It acts as the channel gate, blocking the pore until the channel is bound by ligand. At this point it under goes conformational changes opens the channel.	Domain
B	PF16819	Domain of unknown function (DUF5074) (DUF5074)	Domain of unknown function (DUF5074)	-	Repeat

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Vitamin B12 transporter BtuB1	siderophore-iron transmembrane transporter activity siderophore uptake transmembrane transporter activity transporter activity transmembrane transporter activity	localization nitrogen compound transport transport vitamin transport cobalamin transport establishment of localization siderophore transport monoatomic ion transmembrane transport iron ion transport iron ion transmembrane transport inorganic ion transmembrane transport metal ion transport inorganic cation transmembrane transport siderophore transmembrane transport localization nitrogen compound transport transport vitamin transport cobalamin transport establishment of localization siderophore transport monoatomic ion transmembrane transport iron ion transport iron ion transmembrane transport inorganic ion transmembrane transport metal ion transport inorganic cation transmembrane transport siderophore transmembrane transport transmembrane transport monoatomic cation transmembrane transport transition metal ion transport monoatomic ion transport cellular process monoatomic cation transport iron coordination entity transport	cell periphery cell outer membrane external encapsulating structure membrane cell envelope outer membrane cellular anatomical entity
B	YncE family protein	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR039426	TonB-dependent receptor-like	Family
A	IPR037066	TonB-dependent receptor, plug domain superfamily	Homologous Superfamily
A	IPR036942	TonB-dependent receptor-like, beta-barrel domain superfamily	Homologous Superfamily
A	IPR000531	TonB-dependent receptor-like, beta-barrel	Domain
A	IPR012910	TonB-dependent receptor, plug domain	Domain
B	IPR031815	Protein of unknown function DUF5074	Family
B	IPR011044	Quinoprotein amine dehydrogenase, beta chain-like	Homologous Superfamily
B	IPR015943	WD40/YVTN repeat-like-containing domain superfamily	Homologous Superfamily

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.