Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2B SuperfamilyNucleoside hydrolase 8040839 3001240 SCOP2B (2022-06-29)
BSCOP2B SuperfamilyNucleoside hydrolase 8040839 3001240 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
AIU_nuc_hydroe1hozA1 A: a/b three-layered sandwichesX: Nucleoside hydrolase (From Topology)H: Nucleoside hydrolase (From Topology)T: Nucleoside hydrolaseF: IU_nuc_hydroECOD (1.6)
BIU_nuc_hydroe1hozB1 A: a/b three-layered sandwichesX: Nucleoside hydrolase (From Topology)H: Nucleoside hydrolase (From Topology)T: Nucleoside hydrolaseF: IU_nuc_hydroECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A3.90.245.10 Alpha Beta Alpha-Beta Complex Inosine-uridine Nucleoside N-ribohydrolase Chain ACATH (4.3.0)
B3.90.245.10 Alpha Beta Alpha-Beta Complex Inosine-uridine Nucleoside N-ribohydrolase Chain ACATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
A, B
PF01156Inosine-uridine preferring nucleoside hydrolase (IU_nuc_hydro)Inosine-uridine preferring nucleoside hydrolase- Domain

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

ChainsEnzyme NameDescriptionCatalytic Residues
inosine, adenosine, and guanine nucleoside hydrolase  M-CSA #471

Nucleoside hydrolases (NH's) are members of the purine salvage pathway that tend to scavenge purines from their environment.

The NH of of parasite, Trypanosoma vivax, catalyses the cleavage (hydrolysis) of the N-glycosidic bond between the anomeric carbon of ribose and the purine base in (specifically) inosine, adenosine, and guanine (an IAG-NH). This specificity is via an aromatic face-to-face stacking intercation, rather than general acid catalysis.

IAG-NH's represent potential targets for antiobiotic development and cancer therapy.

Defined by 8 residues: ASP:A-22 [auth A-10]ASP:A-27 [auth A-15]ASP:A-52 [auth A-40]TRP:A-95 [auth A-83]THR:A-149 [auth A-137]ASN:A-198 [auth A-186]TRP:A-272 [auth A-260]ASP:A-273 [auth A-261]
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