1HOZ

CRYSTAL STRUCTURE OF AN INOSINE-ADENOSINE-GUANOSINE-PREFERRING NUCLEOSIDE HYDROLASE FROM TRYPANOSOMA VIVAX

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Structure Motif: Primary M-CSA Annotation

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1hoza1	Alpha and beta proteins (a/b)	Nucleoside hydrolase	Nucleoside hydrolase	Nucleoside hydrolase	Inosine-adenosine-guanosine preferring nucleoside hydrolase	(Trypanosoma vivax ) [TaxId: 5699 ],	SCOPe (2.08)
A	d1hoza2	Artifacts	Tags	Tags	Tags	N-terminal Tags	(Trypanosoma vivax ) [TaxId: 5699 ],	SCOPe (2.08)
B	d1hozb1	Alpha and beta proteins (a/b)	Nucleoside hydrolase	Nucleoside hydrolase	Nucleoside hydrolase	Inosine-adenosine-guanosine preferring nucleoside hydrolase	(Trypanosoma vivax ) [TaxId: 5699 ],	SCOPe (2.08)
B	d1hozb2	Artifacts	Tags	Tags	Tags	N-terminal Tags	(Trypanosoma vivax ) [TaxId: 5699 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Nucleoside hydrolase	8040839	3001240	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Nucleoside hydrolase	8040839	3001240	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	IU_nuc_hydro	e1hozA1	A: a/b three-layered sandwiches	X: Nucleoside hydrolase (From Topology)	H: Nucleoside hydrolase (From Topology)	T: Nucleoside hydrolase	F: IU_nuc_hydro	ECOD (1.6)
B	IU_nuc_hydro	e1hozB1	A: a/b three-layered sandwiches	X: Nucleoside hydrolase (From Topology)	H: Nucleoside hydrolase (From Topology)	T: Nucleoside hydrolase	F: IU_nuc_hydro	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.90.245.10	Alpha Beta	Alpha-Beta Complex	Inosine-uridine Nucleoside N-ribohydrolase	Chain A	CATH (4.3.0)
B	3.90.245.10	Alpha Beta	Alpha-Beta Complex	Inosine-uridine Nucleoside N-ribohydrolase	Chain A	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF01156	Inosine-uridine preferring nucleoside hydrolase (IU_nuc_hydro)	Inosine-uridine preferring nucleoside hydrolase	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	INOSINE-ADENOSINE-GUANOSINE-PREFERRING NUCLEOSIDE HYDROLASE	hydrolase activity, acting on glycosyl bonds hydrolase activity hydrolase activity, hydrolyzing N-glycosyl compounds catalytic activity cation binding ion binding binding metal ion binding small molecule binding	nucleobase-containing compound metabolic process primary metabolic process metabolic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR036452	Ribonucleoside hydrolase-like	Homologous Superfamily
A, B	IPR023186	Inosine/uridine-preferring nucleoside hydrolase	Family
A, B	IPR001910	Inosine/uridine-preferring nucleoside hydrolase domain	Domain

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

Chains	Enzyme Name	Description	Catalytic Residues
A	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] \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif EC: 3.2.2.1 (PDB Primary Data) Search M-CSA Motif + EC 3.2.2.1

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.