4NEF

X-ray structure of human Aquaporin 2

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
Pharos: Disease Associations
Membrane Protein Annotation: OPM
Membrane Protein Annotation: PDBTM
Membrane Protein Annotation: MemProtMD
Membrane Protein Annotation: mpstruc

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d4nefa1	Membrane and cell surface proteins and peptides	Aquaporin-like	Aquaporin-like	automated matches	automated matches	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
A	d4nefa2	Artifacts	Tags	Tags	Tags	N-terminal Tags	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B	d4nefb_	Membrane and cell surface proteins and peptides	Aquaporin-like	Aquaporin-like	automated matches	automated matches	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
C	d4nefc_	Membrane and cell surface proteins and peptides	Aquaporin-like	Aquaporin-like	automated matches	automated matches	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
D	d4nefd1	Membrane and cell surface proteins and peptides	Aquaporin-like	Aquaporin-like	automated matches	automated matches	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
D	d4nefd2	Artifacts	Tags	Tags	Tags	N-terminal Tags	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Aquaporin-like	8072762	3000508	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Aquaporin-like	8072762	3000508	SCOP2B (2022-06-29)
C	SCOP2 Family	Aquaporin-like	8072761	4003025	SCOP2 (2022-06-29)
C	SCOP2 Superfamily	Aquaporin-like	8072762	3000508	SCOP2 (2022-06-29)
D	SCOP2B Superfamily	Aquaporin-like	8072762	3000508	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	MIP	e4nefA1	A: alpha complex topology	X: Aquaporin-like (From Topology)	H: Aquaporin-like (From Topology)	T: Aquaporin-like	F: MIP	ECOD (1.6)
B	MIP	e4nefB1	A: alpha complex topology	X: Aquaporin-like (From Topology)	H: Aquaporin-like (From Topology)	T: Aquaporin-like	F: MIP	ECOD (1.6)
C	MIP	e4nefC1	A: alpha complex topology	X: Aquaporin-like (From Topology)	H: Aquaporin-like (From Topology)	T: Aquaporin-like	F: MIP	ECOD (1.6)
D	MIP	e4nefD1	A: alpha complex topology	X: Aquaporin-like (From Topology)	H: Aquaporin-like (From Topology)	T: Aquaporin-like	F: MIP	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.20.1080.10	Mainly Alpha	Up-down Bundle	Glycerol uptake facilitator protein	Glycerol uptake facilitator protein.	CATH (4.3.0)
B	1.20.1080.10	Mainly Alpha	Up-down Bundle	Glycerol uptake facilitator protein	Glycerol uptake facilitator protein.	CATH (4.3.0)
C	1.20.1080.10	Mainly Alpha	Up-down Bundle	Glycerol uptake facilitator protein	Glycerol uptake facilitator protein.	CATH (4.3.0)
D	1.20.1080.10	Mainly Alpha	Up-down Bundle	Glycerol uptake facilitator protein	Glycerol uptake facilitator protein.	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D	PF00230	Major intrinsic protein (MIP)	Major intrinsic protein	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C, D	Aquaporin-2	water transmembrane transporter activity inorganic molecular entity transmembrane transporter activity transporter activity transmembrane transporter activity passive transmembrane transporter activity channel activity water channel activity organic hydroxy compound transmembrane transporter activity glycerol transmembrane transporter activity polyol transmembrane transporter activity carbohydrate transmembrane transporter activity	cellular response to stimulus cellular response to acid chemical response to stimulus cellular response to water deprivation response to oxygen-containing compound response to water cellular response to oxygen-containing compound cellular response to environmental stimulus cellular response to chemical stimulus response to acid chemical cellular response to stress cellular response to water stimulus response to chemical response to stress cellular response to stimulus cellular response to acid chemical response to stimulus cellular response to water deprivation response to oxygen-containing compound response to water cellular response to oxygen-containing compound cellular response to environmental stimulus cellular response to chemical stimulus response to acid chemical cellular response to stress cellular response to water stimulus response to chemical response to stress response to abiotic stimulus cellular process cellular response to abiotic stimulus response to water deprivation transmembrane transport glycerol transmembrane transport localization transport polyol transmembrane transport carbohydrate transport organic hydroxy compound transport establishment of localization carbohydrate transmembrane transport regulation of body fluid levels multicellular organismal process renal system process system process homeostatic process biological regulation fluid transport water transport renal water transport multicellular organismal-level homeostasis chemical homeostasis multicellular organismal-level water homeostasis multicellular organismal-level chemical homeostasis renal water homeostasis regulation of biological quality protein-containing complex organization protein homotetramerization cellular component organization cellular component biogenesis cellular component assembly protein complex oligomerization protein tetramerization protein-containing complex assembly protein homooligomerization cellular component organization or biogenesis developmental process tube development animal organ development renal system development multicellular organism development metanephros development collecting duct development anatomical structure development metanephric collecting duct development kidney development system development response to copper ion cellular response to metal ion response to metal ion cellular response to copper ion response to mercury ion cellular response to mercury ion organelle organization actin cytoskeleton organization actin filament organization actin filament-based process supramolecular fiber organization cytoskeleton organization	lumenal side of membrane membrane-bounded organelle cellular anatomical structure organelle membrane organelle membrane side of membrane cell periphery apical part of cell plasma membrane plasma membrane region apical plasma membrane extracellular exosome extracellular vesicle lumenal side of membrane membrane-bounded organelle cellular anatomical structure organelle membrane organelle membrane side of membrane cell periphery apical part of cell plasma membrane plasma membrane region apical plasma membrane extracellular exosome extracellular vesicle extracellular organelle extracellular region extracellular space vesicle extracellular membrane-bounded organelle basal part of cell basal plasma membrane basolateral plasma membrane intracellular organelle intracellular anatomical structure Golgi apparatus cytoplasm intracellular membrane-bounded organelle endomembrane system endosome intracellular vesicle recycling endosome cytoplasmic vesicle perinuclear region of cytoplasm transport vesicle transport vesicle membrane cytoplasmic vesicle membrane bounding membrane of organelle vesicle membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D	IPR023271	Aquaporin-like	Homologous Superfamily
A, B, C, D	IPR034294	Aquaporin transporter	Family
A, B, C, D	IPR022357	Major intrinsic protein, conserved site	Conserved Site
A, B, C, D	IPR000425	Major intrinsic protein	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, B, C, D	Pharos: P41181	nephrogenic diabetes insipidus cardiomyopathy diabetes insipidus, nephrogenic, autosomal diabetes insipidus, nephrogenic, X-linked diabetes insipidus Acquired Nephrogenic Diabetes Insipidus allergic rhinitis psoriasis adenoma inappropriate ADH syndrome kidney disease osteosarcoma

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A, B, C, D	OPM	Transmembrane	Alpha-helical polytopic	Major Intrinsic Protein (MIP)/FNT superfamily	Major intrinsic protein (MIP) family

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

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

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

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

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A, B, C, D	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Channels: Aquaporins and Glyceroporins	AQP2 Aquaporin from kidney

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.