Annotations: 1QK4

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
D	d1qk4d_	Alpha and beta proteins (a/b)	PRTase-like	PRTase-like	Phosphoribosyltransferases (PRTases)	Hypoxanthine-guanine-xanthine PRTase	(Toxoplasma gondii RH ) [TaxId: 383379 ],	SCOPe (2.08)
C	d1qk4c_	Alpha and beta proteins (a/b)	PRTase-like	PRTase-like	Phosphoribosyltransferases (PRTases)	Hypoxanthine-guanine-xanthine PRTase	(Toxoplasma gondii RH ) [TaxId: 383379 ],	SCOPe (2.08)
B	d1qk4b_	Alpha and beta proteins (a/b)	PRTase-like	PRTase-like	Phosphoribosyltransferases (PRTases)	Hypoxanthine-guanine-xanthine PRTase	(Toxoplasma gondii RH ) [TaxId: 383379 ],	SCOPe (2.08)
A	d1qk4a_	Alpha and beta proteins (a/b)	PRTase-like	PRTase-like	Phosphoribosyltransferases (PRTases)	Hypoxanthine-guanine-xanthine PRTase	(Toxoplasma gondii RH ) [TaxId: 383379 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
D	SCOP2B Superfamily	PRTase-like	8032220	3000060	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	PRTase-like	8032220	3000060	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	PRTase-like	8032220	3000060	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	PRTase-like	8032220	3000060	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)
D		e1qk4D1	A: C-terminal subdomain in Lon-related proteases catalytic domains	X: C-terminal subdomain in Lon-related proteases catalytic domains	H: C-terminal subdomain in Lon-related proteases catalytic domains	T: E1_dh	F:	ECOD (20:10:01)
C		e1qk4C1	A: C-terminal subdomain in Lon-related proteases catalytic domains	X: C-terminal subdomain in Lon-related proteases catalytic domains	H: C-terminal subdomain in Lon-related proteases catalytic domains	T: E1_dh	F:	ECOD (20:10:01)
B		e1qk4B1	A: C-terminal subdomain in Lon-related proteases catalytic domains	X: C-terminal subdomain in Lon-related proteases catalytic domains	H: C-terminal subdomain in Lon-related proteases catalytic domains	T: E1_dh	F:	ECOD (20:10:01)
A		e1qk4A1	A: C-terminal subdomain in Lon-related proteases catalytic domains	X: C-terminal subdomain in Lon-related proteases catalytic domains	H: C-terminal subdomain in Lon-related proteases catalytic domains	T: E1_dh	F:	ECOD (20:10:01)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
D	3.40.50.2020	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold		CATH (4.3.0)
C	3.40.50.2020	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold		CATH (4.3.0)
B	3.40.50.2020	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold		CATH (4.3.0)
A	3.40.50.2020	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold		CATH (4.3.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C, D	HYPOXANTHINE-GUANINE PHOSPHORIBOSYLTRANSFERASE	cation binding magnesium ion binding ion binding binding metal ion binding small molecule binding pentosyltransferase activity hypoxanthine phosphoribosyltransferase activity glycosyltransferase activity purine phosphoribosyltransferase activity transferase activity catalytic activity nucleoside phosphate binding nucleotide binding cation binding magnesium ion binding ion binding binding metal ion binding small molecule binding pentosyltransferase activity hypoxanthine phosphoribosyltransferase activity glycosyltransferase activity purine phosphoribosyltransferase activity transferase activity catalytic activity nucleoside phosphate binding nucleotide binding heterocyclic compound binding xanthine phosphoribosyltransferase activity guanine phosphoribosyltransferase activity	carbohydrate derivative metabolic process nucleoside biosynthetic process nucleobase-containing compound metabolic process metabolic compound salvage nucleobase-containing small molecule metabolic process purine-containing compound biosynthetic process small molecule metabolic process purine ribonucleoside metabolic process carbohydrate derivative biosynthetic process glycosyl compound biosynthetic process purine-containing compound salvage small molecule biosynthetic process nucleoside salvage purine ribonucleoside biosynthetic process carbohydrate derivative metabolic process nucleoside biosynthetic process nucleobase-containing compound metabolic process metabolic compound salvage nucleobase-containing small molecule metabolic process purine-containing compound biosynthetic process small molecule metabolic process purine ribonucleoside metabolic process carbohydrate derivative biosynthetic process glycosyl compound biosynthetic process purine-containing compound salvage small molecule biosynthetic process nucleoside salvage purine ribonucleoside biosynthetic process primary metabolic process ribonucleoside biosynthetic process nucleobase-containing compound biosynthetic process nucleoside metabolic process nucleobase-containing small molecule biosynthetic process purine-containing compound metabolic process purine ribonucleoside salvage biosynthetic process purine nucleoside biosynthetic process metabolic process cellular process purine nucleoside metabolic process ribonucleoside metabolic process ribose phosphate metabolic process purine ribonucleoside monophosphate biosynthetic process nucleotide biosynthetic process purine ribonucleotide biosynthetic process nucleotide salvage ribonucleotide biosynthetic process purine nucleoside monophosphate biosynthetic process purine ribonucleoside monophosphate metabolic process purine nucleotide metabolic process ribonucleotide metabolic process purine nucleoside monophosphate metabolic process phosphate-containing compound metabolic process purine nucleotide salvage GMP metabolic process phosphorus metabolic process ribose phosphate biosynthetic process nucleoside monophosphate metabolic process nucleoside phosphate metabolic process GMP salvage GMP biosynthetic process nucleotide metabolic process nucleoside monophosphate biosynthetic process purine ribonucleotide salvage organophosphate metabolic process organophosphate biosynthetic process nucleoside phosphate biosynthetic process purine ribonucleotide metabolic process ribonucleoside monophosphate biosynthetic process purine nucleotide biosynthetic process IMP salvage IMP metabolic process IMP biosynthetic process XMP metabolic process XMP salvage XMP biosynthetic process hypoxanthine metabolic process purine nucleobase metabolic process nucleobase metabolic process guanine metabolic process nucleobase biosynthetic process guanine salvage purine nucleobase biosynthetic process purine nucleobase salvage guanine biosynthetic process	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D	IPR050408	Hypoxanthine-guanine phosphoribosyltransferase	Family
A, B, C, D	IPR000836	Phosphoribosyltransferase domain	Domain
A, B, C, D	IPR005904	Hypoxanthine phosphoribosyl transferase	Family
A, B, C, D	IPR029057	Phosphoribosyltransferase-like	Homologous Superfamily

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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.