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

ChainsDomain InfoClassFoldSuperfamilyFamilyDomainSpeciesProvenance Source (Version)
Ad1im5a_ Alpha and beta proteins (a/b) Isochorismatase-like hydrolases Isochorismatase-like hydrolases Isochorismatase-like hydrolases Pyrazinamidase/nicotinamidase (Pyrococcus horikoshii ) [TaxId: 53953 ], SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2 FamilyIsochorismatase-like hydrolases 8024273 4000591 SCOP2 (2022-06-29)
ASCOP2 SuperfamilyIsochorismatase-like hydrolases 8036652 3001778 SCOP2 (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
AIsochorismatasee1im5A1 A: a/b three-layered sandwichesX: Isochorismatase-like hydrolases (From Topology)H: Isochorismatase-like hydrolases (From Topology)T: Isochorismatase-like hydrolasesF: IsochorismataseECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A3.40.50.850 Alpha Beta 3-Layer(aba) Sandwich Rossmann fold Isochorismatase-likeCATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
PF00857Isochorismatase family (Isochorismatase)Isochorismatase family- Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
180aa long hypothetical Pyrazinamidase/Nicotinamidase -

InterPro: Protein Family Classification InterPro Database Homepage

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

ChainsEnzyme NameDescriptionCatalytic Residues
nicotinamidase  M-CSA #716

Pyrazinamide (PZA) is a prodrug used in the treatment of tuberculosis. PZA is converted to the active pyrazinoic acid by the bacterial PZAase enzyme; mutations in PZAase can therefore confer PZA resistance to M. tuberculosis. The gene product of Pyrococcus horikoshii 999 (PH999) shows PZAase and nicotinamidase activity, and extensive sequence homology to M. tuberculosis PZAase.

Defined by 9 residues: ASP:A-10ASP:A-52HIS:A-54SER:A-60HIS:A-71LYS:A-94GLU:A-101ALA:A-129CYS:A-133
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