2BB6

Structure of Cobalamin-complexed Bovine Transcobalamin in Monoclinic Crystal Form

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Transcobalamin C-terminal domain-like	8051866	3002041	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Six-hairpin glycosidases	8051864	3000970	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Transcobalamin C-terminal domain-like	8051866	3002041	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Six-hairpin glycosidases	8051864	3000970	SCOP2B (2022-06-29)
C	SCOP2 Family	Transcobalamin C-terminal domain-like	8051865	4006739	SCOP2 (2022-06-29)
C	SCOP2 Family	Transcobalamin N-terminal domain-like	8048590	4006152	SCOP2 (2022-06-29)
C	SCOP2 Superfamily	Transcobalamin C-terminal domain-like	8051866	3002041	SCOP2 (2022-06-29)
C	SCOP2 Superfamily	Six-hairpin glycosidases	8051864	3000970	SCOP2 (2022-06-29)
D	SCOP2B Superfamily	Six-hairpin glycosidases	8051864	3000970	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Transcobalamin C-terminal domain-like	8051866	3002041	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	Cobalamin_bind	e2bb6A1	A: alpha superhelices	X: Repetitive alpha hairpins	H: alpha/alpha toroid (From Topology)	T: alpha/alpha toroid	F: Cobalamin_bind	ECOD (1.6)
A	DUF4430	e2bb6A3	A: a+b two layers	X: beta-Grasp	H: Ubiquitin-related	T: Ubiquitin-like	F: DUF4430	ECOD (1.6)
B	Cobalamin_bind	e2bb6B3	A: alpha superhelices	X: Repetitive alpha hairpins	H: alpha/alpha toroid (From Topology)	T: alpha/alpha toroid	F: Cobalamin_bind	ECOD (1.6)
B	DUF4430	e2bb6B2	A: a+b two layers	X: beta-Grasp	H: Ubiquitin-related	T: Ubiquitin-like	F: DUF4430	ECOD (1.6)
C	Cobalamin_bind	e2bb6C3	A: alpha superhelices	X: Repetitive alpha hairpins	H: alpha/alpha toroid (From Topology)	T: alpha/alpha toroid	F: Cobalamin_bind	ECOD (1.6)
C	DUF4430	e2bb6C2	A: a+b two layers	X: beta-Grasp	H: Ubiquitin-related	T: Ubiquitin-like	F: DUF4430	ECOD (1.6)
D	Cobalamin_bind	e2bb6D3	A: alpha superhelices	X: Repetitive alpha hairpins	H: alpha/alpha toroid (From Topology)	T: alpha/alpha toroid	F: Cobalamin_bind	ECOD (1.6)
D	DUF4430	e2bb6D2	A: a+b two layers	X: beta-Grasp	H: Ubiquitin-related	T: Ubiquitin-like	F: DUF4430	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.50.10.20	Mainly Alpha	Alpha/alpha barrel	Glycosyltransferase		CATH (4.3.0)
A	2.170.130.30	Mainly Beta	Beta Complex	Ferric Hydroxamate Uptake Protein	Chain A, domain 1	CATH (4.3.0)
B	1.50.10.20	Mainly Alpha	Alpha/alpha barrel	Glycosyltransferase		CATH (4.3.0)
B	2.170.130.30	Mainly Beta	Beta Complex	Ferric Hydroxamate Uptake Protein	Chain A, domain 1	CATH (4.3.0)
C	1.50.10.20	Mainly Alpha	Alpha/alpha barrel	Glycosyltransferase		CATH (4.3.0)
C	2.170.130.30	Mainly Beta	Beta Complex	Ferric Hydroxamate Uptake Protein	Chain A, domain 1	CATH (4.3.0)
D	1.50.10.20	Mainly Alpha	Alpha/alpha barrel	Glycosyltransferase		CATH (4.3.0)
D	2.170.130.30	Mainly Beta	Beta Complex	Ferric Hydroxamate Uptake Protein	Chain A, domain 1	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D	PF01122	Eukaryotic cobalamin-binding protein (Cobalamin_bind)	Eukaryotic cobalamin-binding protein	-	Repeat

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C, D	Transcobalamin II	vitamin binding binding cobalamin binding organic cyclic compound binding tetrapyrrole binding heterocyclic compound binding small molecule binding cation binding ion binding metal ion binding	localization nitrogen compound transport transport vitamin transport organic substance transport cobalamin transport establishment of localization monoatomic ion transmembrane transport inorganic ion transmembrane transport metal ion transport inorganic cation transmembrane transport cobalt ion transport transmembrane transport monoatomic cation transmembrane transport localization nitrogen compound transport transport vitamin transport organic substance transport cobalamin transport establishment of localization monoatomic ion transmembrane transport inorganic ion transmembrane transport metal ion transport inorganic cation transmembrane transport cobalt ion transport transmembrane transport monoatomic cation transmembrane transport transition metal ion transport monoatomic ion transport cellular process monoatomic cation transport	extracellular region extracellular space cellular anatomical entity

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D	IPR002157	Cobalamin (vitamin B12)-binding protein	Family

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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.