Annotations: 7XCN

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
L [auth R]	B12-binding_2	e7xcnR1	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)
L [auth R]	B12-binding	e7xcnR2	A: a/b three-layered sandwiches	X: Flavodoxin-like	H: Class I glutamine amidotransferase-like	T: CheY-like	F: B12-binding	ECOD (1.6)
K [auth Q]	B12-binding_2	e7xcnQ2	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)
K [auth Q]	B12-binding	e7xcnQ1	A: a/b three-layered sandwiches	X: Flavodoxin-like	H: Class I glutamine amidotransferase-like	T: CheY-like	F: B12-binding	ECOD (1.6)
J [auth P]	B12-binding_2	e7xcnP2	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)
J [auth P]	B12-binding	e7xcnP1	A: a/b three-layered sandwiches	X: Flavodoxin-like	H: Class I glutamine amidotransferase-like	T: CheY-like	F: B12-binding	ECOD (1.6)
I [auth O]	B12-binding_2	e7xcnO2	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)
I [auth O]	B12-binding	e7xcnO1	A: a/b three-layered sandwiches	X: Flavodoxin-like	H: Class I glutamine amidotransferase-like	T: CheY-like	F: B12-binding	ECOD (1.6)
H [auth N]	B12-binding_2	e7xcnN2	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)
H [auth N]	B12-binding	e7xcnN1	A: a/b three-layered sandwiches	X: Flavodoxin-like	H: Class I glutamine amidotransferase-like	T: CheY-like	F: B12-binding	ECOD (1.6)
G [auth M]	B12-binding_2	e7xcnM2	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)
G [auth M]	B12-binding	e7xcnM1	A: a/b three-layered sandwiches	X: Flavodoxin-like	H: Class I glutamine amidotransferase-like	T: CheY-like	F: B12-binding	ECOD (1.6)
F	MTTB	e7xcnF1	A: a/b barrels	X: TIM beta/alpha-barrel	H: TIM barrels (From Topology)	T: TIM barrels	F: MTTB	ECOD (1.6)
E	MTTB	e7xcnE1	A: a/b barrels	X: TIM beta/alpha-barrel	H: TIM barrels (From Topology)	T: TIM barrels	F: MTTB	ECOD (1.6)
D	MTTB	e7xcnD1	A: a/b barrels	X: TIM beta/alpha-barrel	H: TIM barrels (From Topology)	T: TIM barrels	F: MTTB	ECOD (1.6)
C	MTTB	e7xcnC1	A: a/b barrels	X: TIM beta/alpha-barrel	H: TIM barrels (From Topology)	T: TIM barrels	F: MTTB	ECOD (1.6)
B	MTTB	e7xcnB1	A: a/b barrels	X: TIM beta/alpha-barrel	H: TIM barrels (From Topology)	T: TIM barrels	F: MTTB	ECOD (1.6)
A	MTTB	e7xcnA1	A: a/b barrels	X: TIM beta/alpha-barrel	H: TIM barrels (From Topology)	T: TIM barrels	F: MTTB	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
L [auth R]	1.10.1240.10	Mainly Alpha	Orthogonal Bundle	Methyltransferase, Methionine Synthase (B12-binding Domains)	Chain A, domain 1	CATH (utative)
L [auth R]	3.40.50.280	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Cobalamin-binding domain	CATH (utative)
K [auth Q]	1.10.1240.10	Mainly Alpha	Orthogonal Bundle	Methyltransferase, Methionine Synthase (B12-binding Domains)	Chain A, domain 1	CATH (utative)
J [auth P]	1.10.1240.10	Mainly Alpha	Orthogonal Bundle	Methyltransferase, Methionine Synthase (B12-binding Domains)	Chain A, domain 1	CATH (utative)
J [auth P]	3.40.50.280	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Cobalamin-binding domain	CATH (utative)
I [auth O]	1.10.1240.10	Mainly Alpha	Orthogonal Bundle	Methyltransferase, Methionine Synthase (B12-binding Domains)	Chain A, domain 1	CATH (utative)
I [auth O]	3.40.50.280	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Cobalamin-binding domain	CATH (utative)
H [auth N]	1.10.1240.10	Mainly Alpha	Orthogonal Bundle	Methyltransferase, Methionine Synthase (B12-binding Domains)	Chain A, domain 1	CATH (utative)
H [auth N]	3.40.50.280	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Cobalamin-binding domain	CATH (utative)
G [auth M]	1.10.1240.10	Mainly Alpha	Orthogonal Bundle	Methyltransferase, Methionine Synthase (B12-binding Domains)	Chain A, domain 1	CATH (utative)
G [auth M]	3.40.50.280	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Cobalamin-binding domain	CATH (utative)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
G [auth M], H [auth N], I [auth O], J [auth P], K [auth Q], G [auth M], H [auth N], I [auth O], J [auth P], K [auth Q], L [auth R]	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 b ...	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
G [auth M], H [auth N], I [auth O], J [auth P], K [auth Q], G [auth M], H [auth N], I [auth O], J [auth P], K [auth Q], L [auth R]	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
A, B, C, D, E A, B, C, D, E, F	PF06253	Trimethylamine methyltransferase (MTTB) (MTTB)	Trimethylamine methyltransferase (MTTB)	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
G [auth M], H [auth N], I [auth O], J [auth P], K [auth Q], G [auth M], H [auth N], I [auth O], J [auth P], K [auth Q], L [auth R]	Trimethylamine methyltransferase corrinoid protein	cation binding transition metal ion binding ion binding binding metal ion binding cobalt ion binding small molecule binding vitamin binding cobalamin binding tetrapyrrole binding heterocyclic compound binding methionine synthase activity 5-methyltetrahydrofolate-dependent methyltransferase activity transferase activity, transferring one-carbon groups cation binding transition metal ion binding ion binding binding metal ion binding cobalt ion binding small molecule binding vitamin binding cobalamin binding tetrapyrrole binding heterocyclic compound binding methionine synthase activity 5-methyltetrahydrofolate-dependent methyltransferase activity transferase activity, transferring one-carbon groups S-methyltransferase activity transferase activity methyltransferase activity catalytic activity	homocysteine metabolic process oxoacid metabolic process sulfur amino acid 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 cellular process small molecule metabolic process sulfur compound metabolic process folic acid-containing compound metabolic process homocysteine metabolic process oxoacid metabolic process sulfur amino acid 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 cellular process small molecule metabolic process sulfur compound metabolic process folic acid-containing compound metabolic process modified amino acid metabolic process tetrahydrofolate metabolic process pteridine-containing compound metabolic process cellular respiration energy derivation by oxidation of organic compounds alkane biosynthetic process methane metabolic process generation of precursor metabolites and energy hydrocarbon metabolic process biosynthetic process energy derivation by oxidation of reduced inorganic compounds methanogenesis hydrocarbon biosynthetic process anaerobic respiration	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol
A, B, C, D, E A, B, C, D, E, F	Trimethylamine methyltransferase	transferase activity, transferring one-carbon groups trimethylamine methyltransferase activity transferase activity methyltransferase activity catalytic activity	methylation metabolic process cellular process cellular respiration energy derivation by oxidation of organic compounds alkane biosynthetic process methane metabolic process generation of precursor metabolites and energy hydrocarbon metabolic process biosynthetic process energy derivation by oxidation of reduced inorganic compounds methanogenesis hydrocarbon biosynthetic process anaerobic respiration	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
G [auth M], H [auth N], I [auth O], J [auth P], K [auth Q], G [auth M], H [auth N], I [auth O], J [auth P], K [auth Q], L [auth R]	IPR003759	Cobalamin (vitamin B12)-binding module, cap domain	Domain
G [auth M], H [auth N], I [auth O], J [auth P], K [auth Q], G [auth M], H [auth N], I [auth O], J [auth P], K [auth Q], L [auth R]	IPR050554	Methionine Synthase/Corrinoid	Family
G [auth M], H [auth N], I [auth O], J [auth P], K [auth Q], G [auth M], H [auth N], I [auth O], J [auth P], K [auth Q], L [auth R]	IPR012741	Methyltransferase cognate corrinoid protein	Domain
G [auth M], H [auth N], I [auth O], J [auth P], K [auth Q], G [auth M], H [auth N], I [auth O], J [auth P], K [auth Q], L [auth R]	IPR006158	Cobalamin (vitamin B12)-binding domain	Domain
G [auth M], H [auth N], I [auth O], J [auth P], K [auth Q], G [auth M], H [auth N], I [auth O], J [auth P], K [auth Q], L [auth R]	IPR036724	Cobalamin-binding domain superfamily	Homologous Superfamily
G [auth M], H [auth N], I [auth O], J [auth P], K [auth Q], G [auth M], H [auth N], I [auth O], J [auth P], K [auth Q], L [auth R]	IPR036594	Methionine synthase domain	Homologous Superfamily
A, B, C, D, E A, B, C, D, E, F	IPR012740	Trimethylamine methyltransferase, Methanosarcina	Family
A, B, C, D, E A, B, C, D, E, F	IPR010426	Trimethylamine methyltransferase	Family
A, B, C, D, E A, B, C, D, E, F	IPR038601	MttB-like 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 R01GM157729.