5I6C

The structure of the eukaryotic purine/H+ symporter, UapA, in complex with Xanthine

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Membrane Protein Annotation: OPM
Membrane Protein Annotation: PDBTM
Membrane Protein Annotation: MemProtMD
Membrane Protein Annotation: mpstruc

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Nucleobase/ascorbate transporter NAT-like	8048340	4006060	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Nucleobase/cation symporter 2 NCS2-like	8092935	3002647	SCOP2 (2022-06-29)
B	SCOP2B Superfamily	Nucleobase/cation symporter 2 NCS2-like	8092935	3002647	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	PF00860	e5i6cA1	A: alpha complex topology	X: Uracil Transporter UraA (From Topology)	H: Uracil Transporter UraA (From Topology)	T: Uracil Transporter UraA	F: PF00860	ECOD (1.6)
B	PF00860	e5i6cB1	A: alpha complex topology	X: Uracil Transporter UraA (From Topology)	H: Uracil Transporter UraA (From Topology)	T: Uracil Transporter UraA	F: PF00860	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF00860	Permease family (Xan_ur_permease)	Permease family	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Uric acid-xanthine permease	nucleobase binding binding organic cyclic compound binding purine nucleobase binding heterocyclic compound binding small molecule binding urate transmembrane transporter activity salt transmembrane transporter activity transporter activity transmembrane transporter activity nucleobase transmembrane transporter activity xanthine transmembrane transporter activity purine nucleobase transmembrane transporter activity	localization purine nucleobase transport xanthine transport nitrogen compound transport nucleobase transport transport organic substance transport establishment of localization organic anion transport urate transport	membrane-bounded organelle intracellular anatomical structure membrane-enclosed lumen vacuolar lumen vacuole autophagosome cellular anatomical entity intracellular membrane-bounded organelle intracellular organelle lumen intracellular organelle organelle lumen organelle cytoplasm autophagosome lumen membrane-bounded organelle intracellular anatomical structure membrane-enclosed lumen vacuolar lumen vacuole autophagosome cellular anatomical entity intracellular membrane-bounded organelle intracellular organelle lumen intracellular organelle organelle lumen organelle cytoplasm autophagosome lumen endosome membrane membrane endosome intracellular vesicle endomembrane system cytoplasmic vesicle membrane bounding membrane of organelle vesicle membrane cytoplasmic vesicle vesicle organelle membrane storage vacuole lytic vacuole fungal-type vacuole cell periphery plasma membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR006043	Nucleobase cation symporter 2 family	Family
A, B	IPR006042	Xanthine/uracil permease	Family

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A, B	OPM	Transmembrane	Alpha-helical polytopic	APC (Amino acid-Polyamine-organoCation) superfamily	Nucleobase:Cation Symporter-2

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A, B	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

Chains	External Link	Comment
A, B	MemProtMD	Annotated as membrane protein by MemProtMD

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A, B	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Nucleobase-Cation-Symport-2 (NCS2) Family	UapA purine/H⁺ symporter in complex with Xanthine

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 R01GM133198.