4R9U

Structure of vitamin B12 transporter BtuCD in a nucleotide-bound outward facing state

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Membrane Protein Annotation: OPM
Membrane Protein Annotation: PDBTM
Membrane Protein Annotation: MemProtMD

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d4r9ua_	Membrane and cell surface proteins and peptides	ABC transporter involved in vitamin B12 uptake, BtuC	ABC transporter involved in vitamin B12 uptake, BtuC	ABC transporter involved in vitamin B12 uptake, BtuC	automated matches	(Escherichia coli K-12 ) [TaxId: 83333 ],	SCOPe (2.08)
B	d4r9ub_	Membrane and cell surface proteins and peptides	ABC transporter involved in vitamin B12 uptake, BtuC	ABC transporter involved in vitamin B12 uptake, BtuC	ABC transporter involved in vitamin B12 uptake, BtuC	automated matches	(Escherichia coli K-12 ) [TaxId: 83333 ],	SCOPe (2.08)
C	d4r9uc_	Alpha and beta proteins (a/b)	P-loop containing nucleoside triphosphate hydrolases	P-loop containing nucleoside triphosphate hydrolases	ABC transporter ATPase domain-like	automated matches	(Escherichia coli K-12 ) [TaxId: 83333 ],	SCOPe (2.08)
D	d4r9ud_	Alpha and beta proteins (a/b)	P-loop containing nucleoside triphosphate hydrolases	P-loop containing nucleoside triphosphate hydrolases	ABC transporter ATPase domain-like	automated matches	(Escherichia coli K-12 ) [TaxId: 83333 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	BtuC-like	8018502	3000523	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	BtuC-like	8018502	3000523	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	ABC transporter-like P-loop ATPases	8058248	3002020	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	ABC transporter-like P-loop ATPases	8058248	3002020	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	FecCD_1	e4r9uA1	A: alpha bundles	X: Type II ABC importer transmembrane domain fold (From Topology)	H: Type II ABC importer transmembrane domain fold (From Topology)	T: Type II ABC importer transmembrane domain fold	F: FecCD_1	ECOD (1.6)
B	FecCD_1	e4r9uB1	A: alpha bundles	X: Type II ABC importer transmembrane domain fold (From Topology)	H: Type II ABC importer transmembrane domain fold (From Topology)	T: Type II ABC importer transmembrane domain fold	F: FecCD_1	ECOD (1.6)
C	ABC_tran	e4r9uC1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: P-loop domains-related	T: P-loop containing nucleoside triphosphate hydrolases	F: ABC_tran	ECOD (1.6)
D	ABC_tran	e4r9uD1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: P-loop domains-related	T: P-loop containing nucleoside triphosphate hydrolases	F: ABC_tran	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.3470.10	Mainly Alpha	Orthogonal Bundle	ABC transporter involved in vitamin B12 uptake, BtuC	ABC transporter involved in vitamin B12 uptake, BtuC	CATH (4.3.0)
B	1.10.3470.10	Mainly Alpha	Orthogonal Bundle	ABC transporter involved in vitamin B12 uptake, BtuC	ABC transporter involved in vitamin B12 uptake, BtuC	CATH (4.3.0)
C	3.40.50.300	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	P-loop containing nucleotide triphosphate hydrolases	CATH (4.3.0)
D	3.40.50.300	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	P-loop containing nucleotide triphosphate hydrolases	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF01032	FecCD transport family (FecCD)	FecCD transport family	-	Family
C, D	PF00005	ABC transporter (ABC_tran)	ABC transporter	ABC transporters for a large family of proteins responsible for translocation of a variety of compounds across biological membranes. ABC transporters are the largest family of proteins in many completely sequenced bacteria. ABC transporters are comp ...	ABC transporters for a large family of proteins responsible for translocation of a variety of compounds across biological membranes. ABC transporters are the largest family of proteins in many completely sequenced bacteria. ABC transporters are composed of two copies of this domain and two copies of a transmembrane domain Pfam:PF00664. These four domains may belong to a single polypeptide as in Swiss:P13569, or belong in different polypeptide chains.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Vitamin B12 import system permease protein BtuC	ABC-type vitamin B12 transporter activity ABC-type transporter activity active transmembrane transporter activity vitamin transmembrane transporter activity primary active transmembrane transporter activity ATPase-coupled transmembrane transporter activity transporter activity transmembrane transporter activity ATP-dependent activity identical protein binding protein binding binding	localization nitrogen compound transport transport vitamin transport cobalamin transport establishment of localization	ATPase dependent transmembrane transport complex protein-containing complex plasma membrane protein complex membrane plasma membrane membrane protein complex cellular anatomical entity transporter complex ATP-binding cassette (ABC) transporter complex cell periphery transmembrane transporter complex BtuCD complex cobalamin transport complex
C, D	Vitamin B12 import ATP-binding protein BtuD	binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding active transmembrane transporter activity primary active transmembrane transporter activity ATPase-coupled transmembrane transporter activity transporter activity transmembrane transporter activity ATP-dependent activity pyrophosphatase activity ATP hydrolysis activity ribonucleoside triphosphate phosphatase activity hydrolase activity, acting on acid anhydrides, in phosphorus-containing anhydrides hydrolase activity hydrolase activity, acting on acid anhydrides catalytic activity ABC-type vitamin B12 transporter activity ABC-type transporter activity vitamin transmembrane transporter activity	localization nitrogen compound transport transport vitamin transport cobalamin transport establishment of localization	ATPase dependent transmembrane transport complex protein-containing complex plasma membrane protein complex membrane plasma membrane membrane protein complex cellular anatomical entity transporter complex ATP-binding cassette (ABC) transporter complex cell periphery transmembrane transporter complex BtuCD complex cobalamin transport complex extrinsic component of membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR037294	ABC transporter, BtuC-like	Homologous Superfamily
A, B	IPR000522	ABC transporter, permease protein, BtuC-like	Family
A, B	IPR023691	ABC transporter, vitamin B12 import, permease protein BtuC	Family
C, D	IPR017871	ABC transporter-like, conserved site	Conserved Site
C, D	IPR050153	Metal Ion Import ATP-binding	Family
C, D	IPR003439	ABC transporter-like, ATP-binding domain	Domain
C, D	IPR003593	AAA+ ATPase domain	Domain
C, D	IPR023693	ABC transporter, vitamin B12, BtuD	Family
C, D	IPR027417	P-loop containing nucleoside triphosphate hydrolase	Homologous Superfamily

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A, B, C, D	OPM	Transmembrane	Alpha-helical polytopic	ABC transporters	FecCD transport family

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A, B, C, D	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

Chains	External Link	Comment
A, B, C, D	MemProtMD	Annotated as membrane protein by MemProtMD

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 R01GM157729.