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 1U5U | pdb_00001u5u

The structure of an Allene Oxide Synthase reveals a novel use for a catalase fold

External Resource: Annotation


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

ChainsDomain InfoClassFoldSuperfamilyFamilyDomainSpeciesProvenance Source (Version)
Bd1u5ub_ Multi-domain proteins (alpha and beta) Heme-dependent catalase-like Heme-dependent catalase-like Allene oxide synthase Allene oxide synthase-lipoxygenase protein, N-terminal domain (Plexaura homomalla ) [TaxId: 47982 ], SCOPe (2.08)
Ad1u5ua_ Multi-domain proteins (alpha and beta) Heme-dependent catalase-like Heme-dependent catalase-like Allene oxide synthase Allene oxide synthase-lipoxygenase protein, N-terminal domain (Plexaura homomalla ) [TaxId: 47982 ], SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
BSCOP2B SuperfamilyHeme-dependent catalase-like 8042776 3001681 SCOP2B (2022-06-29)
ASCOP2 FamilyAllene oxide synthase 8030397 4003889 SCOP2 (2022-06-29)
ASCOP2 SuperfamilyHeme-dependent catalase-like 8042776 3001681 SCOP2 (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
BRhve1u5uB1 A: alpha arraysX: Phage tail fiber protein trimerization domainH: Phage tail fiber protein trimerization domainT: Phage tail fiber protein trimerization domainF: RhvECOD (v295.2)
BEvr1_Alre1u5uB2 A: alpha arraysX: Urease, gamma-subunitH: p53 tetramerization domainT: p53 tetramerization domainF: Evr1_AlrECOD (v295.2)
Ae1u5uA1 A: beta barrelsX: Barrel domain in heme-dependent catalasesH: Barrel domain in heme-dependent catalasesT: Barrel domain in heme-dependent catalasesF:ECOD (v295.2)
Ae1u5uA2 A: alpha bundlesX: First alpha-helical domain in heme-dependent catalasesH: First alpha-helical domain in heme-dependent catalasesT: First alpha-helical domain in heme-dependent catalasesF:ECOD (v295.2)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
B2.40.180.10 Mainly Beta Beta Barrel Catalase HpII, Chain A, domain 1 Catalase core domainCATH (4.3.0)
A2.40.180.10 Mainly Beta Beta Barrel Catalase HpII, Chain A, domain 1 Catalase core domainCATH (4.3.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
A, B
Allene oxide synthase-lipoxygenase protein

InterPro: Protein Family Classification InterPro Database Homepage

ChainsAccessionNameType
A, B
IPR020834Lipoxygenase, conserved siteConserved Site
A, B
IPR020835Catalase superfamilyHomologous Superfamily
A, B
IPR036392PLAT/LH2 domain superfamilyHomologous Superfamily
A, B
IPR001024PLAT/LH2 domainDomain
A, B
IPR036226Lipoxigenase, C-terminal domain superfamilyHomologous Superfamily
A, B
IPR000907LipoxygenaseFamily
A, B
IPR020833Lipoxygenase, iron binding siteBinding Site
A, B
IPR013819Lipoxygenase, C-terminalDomain
A, B
IPR001885Lipoxygenase, mammalianFamily

Membrane Protein Annotation: OPM OPM Database Homepage

ChainsExternal LinkTypeClassSuperfamilyFamily
A, B
OPMMonotopic/peripheralAll alpha monotopic/peripheralLipoxygenaseLipoxygenases

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

ChainsEnzyme NameDescriptionCatalytic Residues
hydroperoxide dehydratase  M-CSA #758

Coral allene oxide synthase (cAOS) is a fusion protein with 8R-lipoxygenase (LOX) from Plexura homomalia. cAOS is a hemoprotein with sequence homology to catalase, and is involved in the catalysis of the production of an unstable epoxide (an allene oxide) from the fatty acid hydroperoxide generated by the lipoxygenase activity (8R-HPETE). Despite the sequence homology to catalase, cAOS does not exhibit catalase activity as is does not catalyse the dismutation of hydrogen peroxide to water.

Defined by 4 residues: THR:A-66HIS:A-67ASN:A-137TYR:A-353
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Explore in 3D: M-CSA Motif Definition
Search M-CSA Motif
EC: 4.2.1.92 (PDB Primary Data)
EC: 4.2.1 (UniProt)
EC: 1.13.11.40 (UniProt)