Annotations: 1QAP

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1qapa1	Alpha and beta proteins (a/b)	TIM beta/alpha-barrel	Nicotinate/Quinolinate PRTase C-terminal domain-like	NadC C-terminal domain-like	Quinolinic acid phosphoribosyltransferase (Nicotinate-nucleotide pyrophosphorylase, NadC), C-terminal domain	(Salmonella enterica subsp. enterica serovar Typhimurium ) [TaxId: 90371 ],	SCOPe (2.08)
A	d1qapa2	Alpha and beta proteins (a+b)	alpha/beta-Hammerhead	Nicotinate/Quinolinate PRTase N-terminal domain-like	NadC N-terminal domain-like	Quinolinic acid phosphoribosyltransferase (Nicotinate-nucleotide pyrophosphorylase, NadC), N-terminal domain	(Salmonella enterica subsp. enterica serovar Typhimurium ) [TaxId: 90371 ],	SCOPe (2.08)
B	d1qapb1	Alpha and beta proteins (a/b)	TIM beta/alpha-barrel	Nicotinate/Quinolinate PRTase C-terminal domain-like	NadC C-terminal domain-like	Quinolinic acid phosphoribosyltransferase (Nicotinate-nucleotide pyrophosphorylase, NadC), C-terminal domain	(Salmonella enterica subsp. enterica serovar Typhimurium ) [TaxId: 90371 ],	SCOPe (2.08)
B	d1qapb2	Alpha and beta proteins (a+b)	alpha/beta-Hammerhead	Nicotinate/Quinolinate PRTase N-terminal domain-like	NadC N-terminal domain-like	Quinolinic acid phosphoribosyltransferase (Nicotinate-nucleotide pyrophosphorylase, NadC), N-terminal domain	(Salmonella enterica subsp. enterica serovar Typhimurium ) [TaxId: 90371 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	NadC N-terminal domain-like	8022632	4001131	SCOP2 (2022-06-29)
A	SCOP2 Family	NadC C-terminal domain-like	8031446	4003327	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Nicotinate/Quinolinate PRTase N-terminal domain-like	8035012	3000867	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Nicotinate/Quinolinate PRTase C-terminal domain-like	8043824	3000603	SCOP2 (2022-06-29)
B	SCOP2B Superfamily	Nicotinate/Quinolinate PRTase C-terminal domain-like	8043824	3000603	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Nicotinate/Quinolinate PRTase N-terminal domain-like	8035012	3000867	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	QRPTase_N	e1qapA1	A: a+b complex topology	X: alpha/beta-Hammerhead/Barrel-sandwich hybrid	H: alpha/beta-Hammerhead/Barrel-sandwich hybrid	T: Nicotinate/Quinolinate PRTase N-terminal domain-like	F: QRPTase_N	ECOD (1.6)
A	QRPTase_C	e1qapA2	A: a/b barrels	X: TIM beta/alpha-barrel	H: TIM barrels (From Topology)	T: TIM barrels	F: QRPTase_C	ECOD (1.6)
B	QRPTase_N	e1qapB1	A: a+b complex topology	X: alpha/beta-Hammerhead/Barrel-sandwich hybrid	H: alpha/beta-Hammerhead/Barrel-sandwich hybrid	T: Nicotinate/Quinolinate PRTase N-terminal domain-like	F: QRPTase_N	ECOD (1.6)
B	QRPTase_C	e1qapB2	A: a/b barrels	X: TIM beta/alpha-barrel	H: TIM barrels (From Topology)	T: TIM barrels	F: QRPTase_C	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.90.1170.20	Alpha Beta	Alpha-Beta Complex	Aldehyde Oxidoreductase	domain 3	CATH (4.3.0)
A	3.20.20.70	Alpha Beta	Alpha-Beta Barrel	TIM Barrel	Aldolase class I	CATH (4.3.0)
B	3.90.1170.20	Alpha Beta	Alpha-Beta Complex	Aldehyde Oxidoreductase	domain 3	CATH (4.3.0)
B	3.20.20.70	Alpha Beta	Alpha-Beta Barrel	TIM Barrel	Aldolase class I	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF02749	Quinolinate phosphoribosyl transferase, N-terminal domain (QRPTase_N)	Quinolinate phosphoribosyl transferase, N-terminal domain	Quinolinate phosphoribosyl transferase (QPRTase) or nicotinate-nucleotide pyrophosphorylase EC:2.4.2.19 is involved in the de novo synthesis of NAD in both prokaryotes and eukaryotes. It catalyses the reaction of quinolinic acid with 5-phosphoribosyl ...	Quinolinate phosphoribosyl transferase (QPRTase) or nicotinate-nucleotide pyrophosphorylase EC:2.4.2.19 is involved in the de novo synthesis of NAD in both prokaryotes and eukaryotes. It catalyses the reaction of quinolinic acid with 5-phosphoribosyl-1-pyrophosphate (PRPP) in the presence of Mg2+ to give rise to nicotinic acid mononucleotide (NaMN), pyrophosphate and carbon dioxide [1,2]. The QA substrate is bound between the C-terminal domain of one subunit, and the N-terminal domain of the other. The N-terminal domain has an alpha/beta hammerhead fold.	Domain
A, B	PF01729	Quinolinate phosphoribosyl transferase, C-terminal domain (QRPTase_C)	Quinolinate phosphoribosyl transferase, C-terminal domain	Quinolinate phosphoribosyl transferase (QPRTase) or nicotinate-nucleotide pyrophosphorylase EC:2.4.2.19 is involved in the de novo synthesis of NAD in both prokaryotes and eukaryotes. It catalyses the reaction of quinolinic acid with 5-phosphoribosyl ...	Quinolinate phosphoribosyl transferase (QPRTase) or nicotinate-nucleotide pyrophosphorylase EC:2.4.2.19 is involved in the de novo synthesis of NAD in both prokaryotes and eukaryotes. It catalyses the reaction of quinolinic acid with 5-phosphoribosyl-1-pyrophosphate (PRPP) in the presence of Mg2+ to give rise to nicotinic acid mononucleotide (NaMN), pyrophosphate and carbon dioxide [1,2]. The QA substrate is bound between the C-terminal domain of one subunit, and the N-terminal domain of the other. The C-terminal domain has a 7 beta-stranded TIM barrel-like fold.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	QUINOLINIC ACID PHOSPHORIBOSYLTRANSFERASE	pentosyltransferase activity glycosyltransferase activity nicotinate-nucleotide diphosphorylase (carboxylating) activity transferase activity catalytic activity	quinolinate metabolic process catabolic process oxoacid metabolic process cellular metabolic process dicarboxylic acid metabolic process carboxylic acid metabolic process dicarboxylic acid catabolic process organic acid metabolic process organic acid catabolic process cellular catabolic process quinolinate catabolic process carboxylic acid catabolic process pyridine-containing compound metabolic process small molecule metabolic process quinolinate metabolic process catabolic process oxoacid metabolic process cellular metabolic process dicarboxylic acid metabolic process carboxylic acid metabolic process dicarboxylic acid catabolic process organic acid metabolic process organic acid catabolic process cellular catabolic process quinolinate catabolic process carboxylic acid catabolic process pyridine-containing compound metabolic process small molecule metabolic process metabolic process cellular process small molecule catabolic process pyridine-containing compound catabolic process nucleotide biosynthetic process NAD metabolic process nucleobase-containing compound metabolic process purine nucleotide metabolic process nucleobase-containing small molecule metabolic process purine-containing compound biosynthetic process phosphate-containing compound metabolic process phosphorus metabolic process pyridine nucleotide metabolic process NAD biosynthetic process pyridine nucleotide biosynthetic process nucleoside phosphate metabolic process nicotinamide nucleotide metabolic process pyridine-containing compound biosynthetic process primary metabolic process nucleotide metabolic process nucleobase-containing compound biosynthetic process purine-containing compound metabolic process nicotinamide nucleotide biosynthetic process biosynthetic process organophosphate metabolic process organophosphate biosynthetic process nucleoside phosphate biosynthetic process purine nucleotide biosynthetic process	intracellular anatomical structure cytoplasm cellular anatomical entity

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR022412	Quinolinate phosphoribosyl transferase, N-terminal	Domain
A, B	IPR037128	Quinolinate phosphoribosyl transferase, N-terminal domain superfamily	Homologous Superfamily
A, B	IPR004393	Nicotinate-nucleotide pyrophosphorylase	Family
A, B	IPR002638	Quinolinate phosphoribosyl transferase, C-terminal	Domain
A, B	IPR013785	Aldolase-type TIM barrel	Homologous Superfamily
A, B	IPR027277	Nicotinate-nucleotide pyrophosphorylase/Putative pyrophosphorylase ModD	Family
A, B	IPR036068	Nicotinate phosphoribosyltransferase-like, C-terminal	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.