2P8B

Crystal structure of N-succinyl Arg/Lys racemase from Bacillus cereus ATCC 14579 complexed with N-succinyl Lys.

External Resource: Annotation


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

ChainsDomain InfoClassFoldSuperfamilyFamilyDomainSpeciesProvenance Source (Version)
Ad2p8ba2 Alpha and beta proteins (a/b) TIM beta/alpha-barrel Enolase C-terminal domain-like automated matches automated matches (Bacillus cereus ATCC 14579 ) [TaxId: 226900 ], SCOPe (2.08)
Ad2p8ba1 Alpha and beta proteins (a+b) Enolase N-terminal domain-like Enolase N-terminal domain-like automated matches automated matches (Bacillus cereus ATCC 14579 ) [TaxId: 226900 ], SCOPe (2.08)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
AMR_MLE_Ne2p8bA1 A: a+b two layersX: Enolase-N/ribosomal proteinH: Enolase N-terminal domain-like (From Topology)T: Enolase N-terminal domain-likeF: MR_MLE_NECOD (1.6)
AMR_MLE_C_1e2p8bA2 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: MR_MLE_C_1ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A3.30.390.10 Alpha Beta 2-Layer Sandwich Enolase-like domain 1CATH (4.3.0)
A3.20.20.120 Alpha Beta Alpha-Beta Barrel TIM Barrel Enolase-like C-terminal domainCATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
PF02746Mandelate racemase / muconate lactonizing enzyme, N-terminal domain (MR_MLE_N)Mandelate racemase / muconate lactonizing enzyme, N-terminal domainSCOP reports fold similarity with enolase N-terminal domain. Domain
PF13378Enolase C-terminal domain-like (MR_MLE_C)Enolase C-terminal domain-likeThis domain appears at the C-terminus of many of the proteins that carry the MR_MLE_N Pfam:PF02746 domain. EC:4.2.1.40. Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
Mandelate racemase/muconate lactonizing enzyme family protein -

InterPro: Protein Family Classification InterPro Database Homepage

ChainsAccessionNameType
IPR029065Enolase C-terminal domain-likeDomain
IPR013341Mandelate racemase/muconate lactonizing enzyme, N-terminal domainDomain
IPR034603Dipeptide epimeraseFamily
IPR013342Mandelate racemase/muconate lactonizing enzyme, C-terminalDomain
IPR029017Enolase-like, N-terminalHomologous Superfamily
IPR036849Enolase-like, C-terminal domain superfamilyHomologous Superfamily

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

ChainsEnzyme NameDescriptionCatalytic Residues
N-succinylamino acid racemase (type 2)  M-CSA #958

Enzymes in the N-succinylamino acid racemase 2 (NSAR2) family catalyse the racemisation of N-succinyl arginine/lysine. Enzymes in this family are highly similar to enzymes in the dipeptide epimerase family. The experimentally characterised enzyme from Bacillus cereus has been shown to catalyse the epimerisation of certain dipeptides, but at a substantially lower rate than the racemisation of N-succinyl arginine/lysine. Although the reaction catalysed by this family is similar to that catalysed by the NSAR family (differing only in the preference of N-succinyl arginine/lysine for NSAR2 versus N-succinyl hydrophobic amino acids for NSAR), phylogenetic analysis suggests that these two families have independent evolutionary origins within the enolase superfamily. Not surprisingly, the amino acids responsible for substrate recognition appear to differ between the two families.

Defined by 5 residues: LYS:A-163ASP:A-191GLU:A-218ASP:A-243LYS:A-267
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EC: 5.1.1 (UniProt)