Annotations: 4KKI

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Transcobalamin C-terminal domain-like	8050041	4006739	SCOP2 (2022-06-29)
A	SCOP2 Family	Transcobalamin N-terminal domain-like	8048591	4006152	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Transcobalamin C-terminal domain-like	8051868	3002041	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Six-hairpin glycosidases	8051867	3000970	SCOP2 (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	e4kkiA2	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	e4kkiA3	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)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF14478	Domain of unknown function (DUF4430) (DUF4430)	Domain of unknown function (DUF4430)	Although this family has overlaps with SLBB, the majority of its sequences are unique. Several family members, eg UniProtKB:A0RGA8, that do not overlap have an LPXTG-cell wall anchor at their C-terminus, a SSF_Family 10_polysaccharide_lyase or Glycos ...	Although this family has overlaps with SLBB, the majority of its sequences are unique. Several family members, eg UniProtKB:A0RGA8, that do not overlap have an LPXTG-cell wall anchor at their C-terminus, a SSF_Family 10_polysaccharide_lyase or Glycosyltransferase structure associated with them in the middle region, as shown by InterPro, as well as this domain at the N-terminus.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Transcobalamin-1	vitamin binding binding cobalamin binding organic cyclic compound binding tetrapyrrole binding heterocyclic compound binding small molecule binding protein binding cargo receptor ligand activity molecular sequestering activity	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	membrane-bounded organelle vesicle lumen intracellular anatomical structure intracellular vesicle membrane-enclosed lumen cytoplasmic vesicle lumen cellular anatomical entity intracellular membrane-bounded organelle secretory granule lumen endomembrane system intracellular organelle lumen intracellular organelle cytoplasmic vesicle organelle lumen membrane-bounded organelle vesicle lumen intracellular anatomical structure intracellular vesicle membrane-enclosed lumen cytoplasmic vesicle lumen cellular anatomical entity intracellular membrane-bounded organelle secretory granule lumen endomembrane system intracellular organelle lumen intracellular organelle cytoplasmic vesicle organelle lumen organelle specific granule lumen secretory granule secretory vesicle cytoplasm vesicle specific granule tertiary granule lumen tertiary granule extracellular region extracellular space

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR002157	Cobalamin (vitamin B12)-binding protein	Family
A	IPR027954	Transcobalamin-like, C-terminal domain	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: P20061	megaloblastic anemia atopic eczema cystic fibrosis large cell medulloblastoma MALT lymphoma osteosarcoma sinusitis breast cancer inborn vitamin B12 deficiency lung adenocarcinoma pancreatic ductal adenocarcinoma ulcerative colitis Crohn disease interstitial cystitis malignant pancreatic neoplasm megaloblastic anemia atopic eczema cystic fibrosis large cell medulloblastoma MALT lymphoma osteosarcoma sinusitis breast cancer inborn vitamin B12 deficiency lung adenocarcinoma pancreatic ductal adenocarcinoma ulcerative colitis Crohn disease interstitial cystitis malignant pancreatic neoplasm non-small cell lung carcinoma psoriasis

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.