Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

ChainsDomain InfoClassFoldSuperfamilyFamilyDomainSpeciesProvenance Source (Version)
Ad5a1ia1 Alpha and beta proteins (a+b) S-adenosylmethionine synthetase S-adenosylmethionine synthetase automated matches automated matches HUMAN (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2B SuperfamilyS-adenosylmethionine synthetase 8035289 3000766 SCOP2B (2022-06-29)
ASCOP2B SuperfamilyS-adenosylmethionine synthetase 8035293 3000766 SCOP2B (2022-06-29)
ASCOP2B SuperfamilyS-adenosylmethionine synthetase 8035292 3000766 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
AS-AdoMet_synt_Ce5a1iA1 A: a+b two layersX: Alpha-lytic protease prodomain-likeH: S-adenosylmethionine synthetase (From Topology)T: S-adenosylmethionine synthetaseF: S-AdoMet_synt_CECOD (1.6)
AS-AdoMet_synt_Me5a1iA3 A: a+b two layersX: Alpha-lytic protease prodomain-likeH: S-adenosylmethionine synthetase (From Topology)T: S-adenosylmethionine synthetaseF: S-AdoMet_synt_MECOD (1.6)
AS-AdoMet_synt_Ne5a1iA2 A: a+b two layersX: Alpha-lytic protease prodomain-likeH: S-adenosylmethionine synthetase (From Topology)T: S-adenosylmethionine synthetaseF: S-AdoMet_synt_NECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A3.30.300.10 Alpha Beta 2-Layer Sandwich GMP Synthetase Chain A, domain 3CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
PF00438S-adenosylmethionine synthetase, N-terminal domain (S-AdoMet_synt_N)S-adenosylmethionine synthetase, N-terminal domainThe three domains of S-adenosylmethionine synthetase have the same alpha+beta fold.Domain
PF02773S-adenosylmethionine synthetase, C-terminal domain (S-AdoMet_synt_C)S-adenosylmethionine synthetase, C-terminal domainThe three domains of S-adenosylmethionine synthetase have the same alpha+beta fold.Domain
PF02772S-adenosylmethionine synthetase, central domain (S-AdoMet_synt_M)S-adenosylmethionine synthetase, central domainThe three domains of S-adenosylmethionine synthetase have the same alpha+beta fold.Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
S-ADENOSYLMETHIONINE SYNTHASE ISOFORM TYPE-2

Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage

ChainsEnzyme NameDescriptionCatalytic Residues
methionine adenosyltransferase  M-CSA #9

In biological systems, methyl groups are transferred from a small number of donors to a large number of acceptors. S-adenosylmethionine (AdoMet) is the most widespread of these donors, and is synthesised solely by the action of AdoMet synthase.

The catalytic site of this enzyme, found in a cleft between two subunits, conducts an unusual reaction pathway where a triphosphate chain is cleaved from ATP as AdoMet is formed and the triphosphate is hydrolysed to diphosphate and phosphate before the product is released. There are three similar domains arranged around a pseudo-threefold symmetry axis.

Defined by 14 residues: HIS:A-29ASP:A-31LYS:A-32GLU:A-57GLU:A-70LYS:A-181PHE:A-250ASP:A-258ALA:A-259ARG:A-264LYS:A-265LYS:A-285LYS:A-289ASP:A-291
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Explore in 3DM-CSA Motif Definition
Up to 10 residues are supported for Structure Motif searching, this motif has 14 residues.
EC: 2.5.1.6 (PDB Primary Data)