Annotations: 8SSE

Methionine synthase, C-terminal fragment, Cobalamin and Reactivation Domains from Thermus thermophilus HB8

External Resource: Annotation

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

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
F	e8sseF1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F:	ECOD (v295.2)
E	e8sseE1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F:	ECOD (v295.2)
D	e8sseD1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F:	ECOD (v295.2)
C	e8sseC1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F:	ECOD (v295.2)
B	e8sseB1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F:	ECOD (v295.2)
A	e8sseA1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F:	ECOD (v295.2)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D, E A, B, C, D, E, F	PF02965	Vitamin B12 dependent methionine synthase, activation domain (Met_synt_B12)	Vitamin B12 dependent methionine synthase, activation domain		Domain
A, B, C, D, E A, B, C, D, E, F	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
A, B, C, D, E A, B, C, D, E, F	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, C, D, E A, B, C, D, E, F	Methionine synthase	vitamin binding binding cobalamin binding tetrapyrrole binding heterocyclic compound binding small molecule binding methionine synthase activity transferase activity, transferring one-carbon groups S-methyltransferase activity transferase activity methyltransferase activity catalytic activity cation binding transition metal ion binding vitamin binding binding cobalamin binding tetrapyrrole binding heterocyclic compound binding small molecule binding methionine synthase activity transferase activity, transferring one-carbon groups S-methyltransferase activity transferase activity methyltransferase activity catalytic activity cation binding transition metal ion binding zinc ion binding ion binding metal ion binding	homocysteine metabolic process oxoacid metabolic process sulfur amino acid metabolic process carboxylic acid metabolic process amino acid metabolic process primary metabolic process non-proteinogenic amino acid metabolic process sulfur compound metabolic process metabolic process cellular process small molecule metabolic process folic acid-containing compound metabolic process modified amino acid metabolic process tetrahydrofolate metabolic process homocysteine metabolic process oxoacid metabolic process sulfur amino acid metabolic process carboxylic acid metabolic process amino acid metabolic process primary metabolic process non-proteinogenic amino acid metabolic process sulfur compound metabolic process metabolic process cellular process small molecule metabolic process folic acid-containing compound metabolic process modified amino acid metabolic process tetrahydrofolate metabolic process pteridine-containing compound metabolic process	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D, E A, B, C, D, E, F	IPR003759	Cobalamin (vitamin B12)-binding module, cap domain	Domain
A, B, C, D, E A, B, C, D, E, F	IPR050554	Methionine Synthase/Corrinoid	Family
A, B, C, D, E A, B, C, D, E, F	IPR011005	Dihydropteroate synthase-like superfamily	Homologous Superfamily
A, B, C, D, E A, B, C, D, E, F	IPR033706	Methionine synthase, B12-binding domain	Domain
A, B, C, D, E A, B, C, D, E, F	IPR006158	Cobalamin (vitamin B12)-binding domain	Domain
A, B, C, D, E A, B, C, D, E, F	IPR003726	Homocysteine-binding domain	Domain
A, B, C, D, E A, B, C, D, E, F	IPR004223	Vitamin B12-dependent methionine synthase, activation domain	Domain
A, B, C, D, E A, B, C, D, E, F	IPR036589	Homocysteine-binding domain superfamily	Homologous Superfamily
A, B, C, D, E A, B, C, D, E, F	IPR000489	Pterin-binding domain	Domain
A, B, C, D, E A, B, C, D, E, F	IPR036724	Cobalamin-binding domain superfamily	Homologous Superfamily
A, B, C, D, E A, B, C, D, E, F	IPR011822	Cobalamin-dependent methionine synthase	Family
A, B, C, D, E A, B, C, D, E, F	IPR036594	Methionine synthase domain	Homologous Superfamily
A, B, C, D, E A, B, C, D, E, F	IPR037010	Vitamin B12-dependent methionine synthase, activation domain superfamily	Homologous Superfamily

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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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.

8SSE | pdb_00008sse

Methionine synthase, C-terminal fragment, Cobalamin and Reactivation Domains from Thermus thermophilus HB8

External Resource: Annotation

Domain Annotation: ECOD Classification ECOD Database Homepage

Protein Family Annotation Pfam Database Homepage

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

InterPro: Protein Family Classification InterPro Database Homepage