4JGI

1.5 Angstrom crystal structure of a novel cobalamin-binding protein from Desulfitobacterium hafniense DCB-2

External Resource: Annotation

Domain Annotation: ECOD Classification
Domain Annotation: CATH
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	B12-binding_2	e4jgiA2	A: alpha arrays	X: Methionine synthase domain-like (From Topology)	H: Methionine synthase domain-like (From Topology)	T: Methionine synthase domain-like	F: B12-binding_2	ECOD (1.6)
A	B12-binding	e4jgiA1	A: a/b three-layered sandwiches	X: Flavodoxin-like	H: Class I glutamine amidotransferase-like	T: CheY-like	F: B12-binding	ECOD (1.6)
B	B12-binding_2	e4jgiB3	A: alpha arrays	X: Methionine synthase domain-like (From Topology)	H: Methionine synthase domain-like (From Topology)	T: Methionine synthase domain-like	F: B12-binding_2	ECOD (1.6)
B	B12-binding	e4jgiB1	A: a/b three-layered sandwiches	X: Flavodoxin-like	H: Class I glutamine amidotransferase-like	T: CheY-like	F: B12-binding	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.1240.10	Mainly Alpha	Orthogonal Bundle	Methyltransferase, Methionine Synthase (B12-binding Domains)	Chain A, domain 1	CATH (4.3.0)
A	3.40.50.280	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Cobalamin-binding domain	CATH (4.3.0)
B	1.10.1240.10	Mainly Alpha	Orthogonal Bundle	Methyltransferase, Methionine Synthase (B12-binding Domains)	Chain A, domain 1	CATH (4.3.0)
B	3.40.50.280	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Cobalamin-binding domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF02607	B12 binding domain (B12-binding_2)	B12 binding domain	This B12 binding domain is found in methionine synthase EC:2.1.1.13 Swiss:Q99707, and other shorter proteins that bind to B12. This domain is always found to the N-terminus of Pfam:PF02310. The structure of this domain is known [1], it is a 4 helix ...	This B12 binding domain is found in methionine synthase EC:2.1.1.13 Swiss:Q99707, and other shorter proteins that bind to B12. This domain is always found to the N-terminus of Pfam:PF02310. The structure of this domain is known [1], it is a 4 helix bundle. Many of the conserved residues in this domain are involved in B12 binding, such as those in the MXXVG motif.	Domain
A, B	PF02310	B12 binding domain (B12-binding)	B12 binding domain	This domain binds to B12 (adenosylcobamide)[1-3], it is found in several enzymes, such as glutamate mutase Swiss:Q05488, methionine synthase Swiss:Q99707 and methylmalonyl-CoA mutase Swiss:P22033. It contains a conserved DxHxxGx(41)SxVx(26)GG motif, ...	This domain binds to B12 (adenosylcobamide)[1-3], it is found in several enzymes, such as glutamate mutase Swiss:Q05488, methionine synthase Swiss:Q99707 and methylmalonyl-CoA mutase Swiss:P22033. It contains a conserved DxHxxGx(41)SxVx(26)GG motif, which is important for B12 binding [2].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Putative uncharacterized protein	vitamin binding binding cobalamin binding organic cyclic compound binding tetrapyrrole binding heterocyclic compound binding small molecule binding methionine synthase activity 5-methyltetrahydrofolate-dependent methyltransferase activity transferase activity, transferring one-carbon groups S-methyltransferase activity transferase activity methyltransferase activity catalytic activity vitamin binding binding cobalamin binding organic cyclic compound binding tetrapyrrole binding heterocyclic compound binding small molecule binding methionine synthase activity 5-methyltetrahydrofolate-dependent methyltransferase activity transferase activity, transferring one-carbon groups S-methyltransferase activity transferase activity methyltransferase activity catalytic activity cation binding ion binding metal ion binding	homocysteine metabolic process oxoacid metabolic process sulfur amino acid metabolic process cellular metabolic process carboxylic acid metabolic process amino acid metabolic process primary metabolic process organic acid metabolic process alpha-amino acid metabolic process non-proteinogenic amino acid metabolic process metabolic process small molecule metabolic process cellular process sulfur compound metabolic process homocysteine metabolic process oxoacid metabolic process sulfur amino acid metabolic process cellular metabolic process carboxylic acid metabolic process amino acid metabolic process primary metabolic process organic acid metabolic process alpha-amino acid metabolic process non-proteinogenic amino acid metabolic process metabolic process small molecule metabolic process cellular process sulfur compound metabolic process folic acid-containing compound metabolic process tetrahydrofolate metabolic process pteridine-containing compound metabolic process cellular modified amino acid metabolic process	intracellular anatomical structure cytoplasm cellular anatomical entity cytosol

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR003759	Cobalamin (vitamin B12)-binding module, cap domain	Domain
A, B	IPR036724	Cobalamin-binding domain superfamily	Homologous Superfamily
A, B	IPR050554	Methionine Synthase/Corrinoid	Family
A, B	IPR006158	Cobalamin (vitamin B12)-binding domain	Domain
A, B	IPR036594	Methionine synthase domain	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 R01GM157729.