Annotations: 8CSX

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A [auth K]	F_UNCLASSIFIED	e8csxK1	A: alpha complex topology	X: Ammonium transporter-related (From Homology)	H: Ammonium transporter-related	T: Ammonium transporter	F: F_UNCLASSIFIED	ECOD (1.6)
B [auth L]	Ammonium_transp_1	e8csxL1	A: alpha complex topology	X: Ammonium transporter-related (From Homology)	H: Ammonium transporter-related	T: Ammonium transporter	F: Ammonium_transp_1	ECOD (1.6)
C [auth Q]	Ammonium_transp_1	e8csxQ1	A: alpha complex topology	X: Ammonium transporter-related (From Homology)	H: Ammonium transporter-related	T: Ammonium transporter	F: Ammonium_transp_1	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth K]	PF00909	Ammonium Transporter Family (Ammonium_transp)	Ammonium Transporter Family	-	Family
B [auth L], C [auth Q]	PF00909	Ammonium Transporter Family (Ammonium_transp)	Ammonium Transporter Family	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth K]	Blood group Rh(CE) polypeptide	ammonium channel activity passive transmembrane transporter activity inorganic molecular entity transmembrane transporter activity inorganic cation transmembrane transporter activity channel activity transporter activity transmembrane transporter activity	inorganic ion homeostasis chemical homeostasis homeostatic process ammonium homeostasis transmembrane transport localization nitrogen compound transport transport ammonium transmembrane transport cellular process inorganic ion transmembrane transport establishment of localization inorganic cation transmembrane transport	cell periphery plasma membrane membrane cellular anatomical entity ankyrin-1 complex protein-containing complex membrane protein complex
B [auth L], C [auth Q]	Ammonium transporter Rh type A	passive transmembrane transporter activity narrow pore channel activity leak channel activity channel activity transporter activity transmembrane transporter activity carbon dioxide transmembrane transporter activity organic cation transmembrane transporter activity amine transmembrane transporter activity methylammonium transmembrane transporter activity ammonium channel activity inorganic molecular entity transmembrane transporter activity inorganic cation transmembrane transporter activity cytoskeletal protein binding passive transmembrane transporter activity narrow pore channel activity leak channel activity channel activity transporter activity transmembrane transporter activity carbon dioxide transmembrane transporter activity organic cation transmembrane transporter activity amine transmembrane transporter activity methylammonium transmembrane transporter activity ammonium channel activity inorganic molecular entity transmembrane transporter activity inorganic cation transmembrane transporter activity cytoskeletal protein binding ankyrin binding protein binding binding	inorganic ion homeostasis chemical homeostasis homeostatic process ammonium homeostasis transmembrane transport localization nitrogen compound transport transport ammonium transmembrane transport cellular process inorganic ion transmembrane transport establishment of localization inorganic cation transmembrane transport one-carbon compound transport inorganic ion homeostasis chemical homeostasis homeostatic process ammonium homeostasis transmembrane transport localization nitrogen compound transport transport ammonium transmembrane transport cellular process inorganic ion transmembrane transport establishment of localization inorganic cation transmembrane transport one-carbon compound transport gas transport carbon dioxide transport carbon dioxide transmembrane transport developmental process multicellular organismal process erythrocyte development cellular developmental process hemopoiesis cell development erythrocyte differentiation multicellular organismal-level homeostasis myeloid cell differentiation immune system process cell differentiation anatomical structure development myeloid cell development homeostasis of number of cells myeloid cell homeostasis erythrocyte homeostasis cellular homeostasis monoatomic ion homeostasis intracellular chemical homeostasis intracellular monoatomic ion homeostasis bicarbonate transport organic anion transport multicellular organismal-level iron ion homeostasis multicellular organismal-level chemical homeostasis monoatomic cation homeostasis methylammonium transmembrane transport organic cation transport amine transport methylammonium transport	membrane cellular anatomical entity ankyrin-1 complex protein-containing complex membrane protein complex cell periphery plasma membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth K]	IPR002229	Blood group Rhesus C/E/D polypeptide	Family
A [auth K]	IPR029020	Ammonium/urea transporter	Homologous Superfamily
A [auth K]	IPR024041	Ammonium transporter AmtB-like domain	Domain
B [auth L], C [auth Q]	IPR002229	Blood group Rhesus C/E/D polypeptide	Family
B [auth L], C [auth Q]	IPR029020	Ammonium/urea transporter	Homologous Superfamily
B [auth L], C [auth Q]	IPR024041	Ammonium transporter AmtB-like domain	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A [auth K]	Pharos: P18577	familial hemolytic anemia Rh deficiency syndrome Anemia, Hemolytic, Congenital MALT lymphoma ovarian cancer spina bifida blood group incompatibility medulloblastoma osteosarcoma
B [auth L], C [auth Q]	Pharos: Q02094	Rh deficiency syndrome overhydrated hereditary stomatocytosis familial hemolytic anemia congenital anemia hemolytic anemia osteosarcoma Cytopenia large cell medulloblastoma MALT lymphoma psoriasis

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A [auth K], B [auth L], C [auth Q]	OPM	Transmembrane	Alpha-helical polytopic	Ammonia/urea transporters/Na+ exporter	Ammonia transporter Amt

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A [auth K], B [auth L], C [auth Q]	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A [auth K], B [auth L], C [auth Q]	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Solute Carrier Family 4 (anion exchanger)	Erythrocyte Band 3 anion exchanger complex. Band 3-Glycophorin A complex, outward facing

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.