1BJP | pdb_00001bjp

CRYSTAL STRUCTURE OF 4-OXALOCROTONATE TAUTOMERASE INACTIVATED BY 2-OXO-3-PENTYNOATE AT 2.4 ANGSTROMS RESOLUTION

External Resource: Annotation


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

ChainsDomain InfoClassFoldSuperfamilyFamilyDomainSpeciesProvenance Source (Version)
Bd1bjpb_ Alpha and beta proteins (a+b) Tautomerase/MIF Tautomerase/MIF 4-oxalocrotonate tautomerase-like 4-oxalocrotonate tautomerase (Pseudomonas putida ) [TaxId: 303 ], SCOPe (2.08)
Ed1bjpe_ Alpha and beta proteins (a+b) Tautomerase/MIF Tautomerase/MIF 4-oxalocrotonate tautomerase-like 4-oxalocrotonate tautomerase (Pseudomonas putida ) [TaxId: 303 ], SCOPe (2.08)
Dd1bjpd_ Alpha and beta proteins (a+b) Tautomerase/MIF Tautomerase/MIF 4-oxalocrotonate tautomerase-like 4-oxalocrotonate tautomerase (Pseudomonas putida ) [TaxId: 303 ], SCOPe (2.08)
Cd1bjpc_ Alpha and beta proteins (a+b) Tautomerase/MIF Tautomerase/MIF 4-oxalocrotonate tautomerase-like 4-oxalocrotonate tautomerase (Pseudomonas putida ) [TaxId: 303 ], SCOPe (2.08)
Ad1bjpa_ Alpha and beta proteins (a+b) Tautomerase/MIF Tautomerase/MIF 4-oxalocrotonate tautomerase-like 4-oxalocrotonate tautomerase (Pseudomonas putida ) [TaxId: 303 ], SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
BSCOP2B SuperfamilyTautomerase/MIF 8036048 3001770 SCOP2B (2022-06-29)
ESCOP2B SuperfamilyTautomerase/MIF 8036048 3001770 SCOP2B (2022-06-29)
DSCOP2B SuperfamilyTautomerase/MIF 8036048 3001770 SCOP2B (2022-06-29)
CSCOP2B SuperfamilyTautomerase/MIF 8036048 3001770 SCOP2B (2022-06-29)
ASCOP2 Family4-oxalocrotonate tautomerase-like 8023668 4001527 SCOP2 (2022-06-29)
ASCOP2 SuperfamilyTautomerase/MIF 8036048 3001770 SCOP2 (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
Be1bjpB2 A: DEATH domainX: Ten stranded beta/alpha barrelH: Ten stranded beta/alpha barrelT: DcpS_CF:ECOD (20:10:01)
Ee1bjpE2 A: DEATH domainX: Ten stranded beta/alpha barrelH: Ten stranded beta/alpha barrelT: DcpS_CF:ECOD (20:10:01)
De1bjpD2 A: DEATH domainX: Ten stranded beta/alpha barrelH: Ten stranded beta/alpha barrelT: DcpS_CF:ECOD (20:10:01)
Ce1bjpC1 A: C-terminal subdomain in Lon-related proteases catalytic domainsX: C-terminal subdomain in Lon-related proteases catalytic domainsH: C-terminal subdomain in Lon-related proteases catalytic domainsT: Propep_M14F:ECOD (20:10:01)
Ae1bjpA2 A: DEATH domainX: Ten stranded beta/alpha barrelH: Ten stranded beta/alpha barrelT: DcpS_CF:ECOD (20:10:01)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
B3.30.429.10 Alpha Beta 2-Layer Sandwich Macrophage Migration Inhibitory Factor Macrophage Migration Inhibitory FactorCATH (4.3.0)
E3.30.429.10 Alpha Beta 2-Layer Sandwich Macrophage Migration Inhibitory Factor Macrophage Migration Inhibitory FactorCATH (4.3.0)
D3.30.429.10 Alpha Beta 2-Layer Sandwich Macrophage Migration Inhibitory Factor Macrophage Migration Inhibitory FactorCATH (4.3.0)
C3.30.429.10 Alpha Beta 2-Layer Sandwich Macrophage Migration Inhibitory Factor Macrophage Migration Inhibitory FactorCATH (4.3.0)
A3.30.429.10 Alpha Beta 2-Layer Sandwich Macrophage Migration Inhibitory Factor Macrophage Migration Inhibitory FactorCATH (4.3.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
A, B, C, D, E
4-OXALOCROTONATE TAUTOMERASE -

InterPro: Protein Family Classification InterPro Database Homepage

ChainsAccessionNameType
A, B, C, D, E
IPR014347Tautomerase/MIF superfamilyHomologous Superfamily
A, B, C, D, E
IPR0043704-oxalocrotonate tautomerase-like domainDomain
A, B, C, D, E
IPR0181914-oxalocrotonate tautomeraseFamily

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

ChainsEnzyme NameDescriptionCatalytic Residues
A, B
2-hydroxymuconate tautomerase  M-CSA #61

2-hydroxymuconate tautomerase is also known as 4-oxalocrotonate tautomerase (4-OT). Converts 2-hydroxymuconate to the alpha-beta-unsaturated ketone, 2-oxo-3-hexenedioate [PMID:1339435]. This enzyme forms part of a bacterial metabolic pathway that oxidatively catabolises toluene, o-xylene, 3-ethyltoluene, and 1,2,4-trimethylbenzene into intermediates of the citric acid cycle.

4-OT has only 62 residues in each chain, making it one of the smallest enzyme subunits known [PMID:12051677]. In solution, however, the enzyme forms a hexamer of six identical subunits, so the active site may be formed by amino acid residues from several subunits [PMID:8547259].

The rate of catalysis approaches the diffusion-controlled limit. The gene for the enzyme is carried by the TOL plasmid in Pseudomonas putrida, and is involved in the catabolism of aromatic carbon sources. This entry represents a group of 4-oxalocrotonate tautomerases found in Pseudomonas [PMID:1339435] and other species of bacteria and archaea.

Defined by 4 residues: PRO:A_3-1ARG:B-39PHE:B_3-50ARG:B_3-61
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Explore in 3D: M-CSA Motif Definition
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EC: 5.3.2 (PDB Primary Data)
EC: 5.3.2.6 (UniProt)