8CT2

Local refinement of AQP1 tetramer (C1; refinement mask included D1 of protein 4.2 and Ankyrin-1 AR1-5) in Class 2 of erythrocyte ankyrin-1 complex

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
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: mpstruc

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A [auth D]	SCOP2B Superfamily	Aquaporin-like	8036332	3000508	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Aquaporin-like	8036332	3000508	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Aquaporin-like	8036332	3000508	SCOP2B (2022-06-29)
D [auth A]	SCOP2B Superfamily	Aquaporin-like	8036332	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 [auth D]	MIP	e8ct2D1	A: alpha complex topology	X: Aquaporin-like (From Topology)	H: Aquaporin-like (From Topology)	T: Aquaporin-like	F: MIP	ECOD (1.6)
B	MIP	e8ct2B1	A: alpha complex topology	X: Aquaporin-like (From Topology)	H: Aquaporin-like (From Topology)	T: Aquaporin-like	F: MIP	ECOD (1.6)
C	MIP	e8ct2C1	A: alpha complex topology	X: Aquaporin-like (From Topology)	H: Aquaporin-like (From Topology)	T: Aquaporin-like	F: MIP	ECOD (1.6)
D [auth A]	MIP	e8ct2A1	A: alpha complex topology	X: Aquaporin-like (From Topology)	H: Aquaporin-like (From Topology)	T: Aquaporin-like	F: MIP	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth D], B, C, D [auth A]	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 [auth D], B, C, D [auth A]	Aquaporin-1	monoatomic cation transmembrane transporter activity potassium ion transmembrane transporter activity inorganic molecular entity transmembrane transporter activity inorganic cation transmembrane transporter activity monoatomic ion transmembrane transporter activity transporter activity metal ion transmembrane transporter activity transmembrane transporter activity water transmembrane transporter activity nitric oxide transmembrane transporter activity protein binding binding signaling receptor binding ephrin receptor binding monoatomic cation transmembrane transporter activity potassium ion transmembrane transporter activity inorganic molecular entity transmembrane transporter activity inorganic cation transmembrane transporter activity monoatomic ion transmembrane transporter activity transporter activity metal ion transmembrane transporter activity transmembrane transporter activity water transmembrane transporter activity nitric oxide transmembrane transporter activity protein binding binding signaling receptor binding ephrin receptor binding intracellularly ligand-gated monoatomic ion channel activity gated channel activity monoatomic ion channel activity intracellularly cyclic nucleotide-activated monoatomic cation channel activity ligand-gated channel activity ligand-gated monoatomic ion channel activity monoatomic cation channel activity passive transmembrane transporter activity channel activity ligand-gated monoatomic cation channel activity cyclic nucleotide-activated monoatomic ion channel activity intracellularly cGMP-activated cation channel activity identical protein binding carbon dioxide transmembrane transporter activity potassium channel activity water channel activity organic hydroxy compound transmembrane transporter activity glycerol transmembrane transporter activity polyol transmembrane transporter activity carbohydrate transmembrane transporter activity ammonium channel activity	multicellular organismal process regulation of body fluid levels secretion by tissue secretion transport biological regulation cerebrospinal fluid secretion establishment of localization localization body fluid secretion regulation of biological quality kidney epithelium development nephron tubule development metanephric epithelium development multicellular organismal process regulation of body fluid levels secretion by tissue secretion transport biological regulation cerebrospinal fluid secretion establishment of localization localization body fluid secretion regulation of biological quality kidney epithelium development nephron tubule development metanephric epithelium development metanephric proximal tubule development proximal straight tubule development renal system development multicellular organism development metanephros development renal tubule development anatomical structure development nephron development metanephric nephron epithelium development system development nephron epithelium development developmental process epithelium development proximal tubule development tube development metanephric nephron tubule development animal organ development tissue development metanephric proximal straight tubule development metanephric tubule development kidney development negative regulation of hydrolase activity regulation of cellular process negative regulation of proteolysis regulation of catalytic activity negative regulation of biological process negative regulation of catalytic activity regulation of programmed cell death negative regulation of endopeptidase activity regulation of primary metabolic process negative regulation of peptidase activity regulation of cysteine-type endopeptidase activity involved in apoptotic process regulation of proteolysis proteolysis regulation of endopeptidase activity negative regulation of cellular process negative regulation of cysteine-type endopeptidase activity involved in apoptotic process protein metabolic process negative regulation of protein metabolic process negative regulation of macromolecule metabolic process regulation of cysteine-type endopeptidase activity regulation of biological process negative regulation of programmed cell death regulation of protein metabolic process regulation of apoptotic process negative regulation of metabolic process regulation of peptidase activity negative regulation of molecular function primary metabolic process regulation of macromolecule metabolic process cell death regulation of molecular function negative regulation of apoptotic process regulation of hydrolase activity negative regulation of cysteine-type endopeptidase activity metabolic process cellular process macromolecule metabolic process apoptotic process regulation of metabolic process programmed cell death renal system process system process homeostatic process 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 response to decreased oxygen levels cellular response to stimulus response to stimulus cellular response to oxygen levels cellular response to hypoxia cellular response to decreased oxygen levels cellular response to chemical stimulus cellular response to stress response to hypoxia response to stress response to chemical response to oxygen levels response to abiotic stimulus head development lateral ventricle development forebrain development brain development nervous system development central nervous system development ventricular system development telencephalon development response to lipid response to oxygen-containing compound cellular response to oxygen-containing compound response to retinoic acid cellular response to retinoic acid cellular response to lipid ameboidal-type cell migration cell migration fibroblast migration cell motility metanephric proximal convoluted tubule segment 2 development proximal convoluted tubule development proximal convoluted tubule segment 2 development metanephric proximal convoluted tubule development response to ketone cellular response to endogenous stimulus response to hormone response to steroid hormone cellular response to ketone cellular response to steroid hormone stimulus response to organic cyclic compound cellular response to hormone stimulus response to endogenous stimulus cellular response to dexamethasone stimulus response to glucocorticoid cellular response to organic cyclic compound cellular response to glucocorticoid stimulus cellular response to corticosteroid stimulus response to corticosteroid response to dexamethasone response to osmotic stress cellular response to chemical stress cellular response to osmotic stress cellular response to environmental stimulus hyperosmotic response cellular hyperosmotic response cellular response to abiotic stimulus transepithelial water transport epithelial fluid transport transepithelial transport one-carbon compound transport gas transport carbon dioxide transport transmembrane transport carbon dioxide transmembrane transport anatomical structure morphogenesis odontogenesis animal organ morphogenesis pancreatic juice secretion digestive system process digestion camera-type eye morphogenesis sensory organ development eye development visual system development eye morphogenesis sensory organ morphogenesis camera-type eye development sensory system development cellular response to metal ion response to mercury ion response to metal ion cellular response to mercury ion biological process involved in interspecies interaction between organisms response to other organism defense response response to external stimulus defense response to Gram-negative bacterium response to biotic stimulus defense response to bacterium defense response to other organism response to bacterium response to external biotic stimulus regulation of localization regulation of system process positive regulation of biological process saliva secretion positive regulation of secretion regulation of saliva secretion positive regulation of digestive system process regulation of multicellular organismal process regulation of transport regulation of digestive system process regulation of secretion positive regulation of transport positive regulation of multicellular organismal process positive regulation of saliva secretion cellular response to salt stress response to salt stress lipid digestion vesicle organization cellular component organization organelle organization secretory granule organization cellular component organization or biogenesis endomembrane system organization cellular response to nitrogen compound response to nitrogen compound cellular response to nitric oxide response to nitric oxide cellular response to reactive nitrogen species loop of Henle development metanephric loop of Henle development metanephric descending thin limb development descending thin limb development nitrogen compound transport ammonium transmembrane transport inorganic ion transmembrane transport inorganic cation transmembrane transport cellular homeostasis signaling hormone secretion cell communication peptide secretion secretion by cell amide transport signal release corticotropin secretion regulation of hormone levels cell-cell signaling export from cell peptide transport endocrine hormone secretion endocrine process peptide hormone secretion hormone transport glycerol transmembrane transport polyol transmembrane transport carbohydrate transport organic hydroxy compound transport carbohydrate transmembrane transport establishment or maintenance of actin cytoskeleton polarity establishment or maintenance of cytoskeleton polarity actin cytoskeleton organization actin filament-based process establishment or maintenance of cell polarity cytoskeleton organization renal absorption renal water absorption fibroblast proliferation cell population proliferation positive regulation of cell population proliferation regulation of fibroblast proliferation regulation of cell population proliferation positive regulation of fibroblast proliferation positive regulation of cellular process cGMP-mediated signaling intracellular signal transduction intracellular signaling cassette signal transduction positive regulation of locomotion regulation of cell motility regulation of fibroblast migration positive regulation of fibroblast migration positive regulation of cell migration regulation of locomotion positive regulation of cell motility regulation of cell migration locomotion regulation of cellular component size cell volume homeostasis regulation of cell size regulation of anatomical structure size metanephric glomerulus vasculature development metanephric glomerulus development vasculature development kidney vasculature development circulatory system development glomerulus development renal system vasculature development glomerulus vasculature development metanephric nephron development blood vessel development response to organophosphorus response to purine-containing compound response to cAMP cellular response to cAMP intracellular water homeostasis intracellular chemical homeostasis glomerular filtration renal filtration cellular localization establishment of localization in cell monoatomic ion transport potassium ion transport monoatomic cation transport metal ion transport response to copper ion cellular response to copper ion cellular response to oxidative stress cellular response to hydrogen peroxide response to reactive oxygen species response to hydrogen peroxide response to oxidative stress cellular response to reactive oxygen species response to mechanical stimulus cellular response to mechanical stimulus cellular response to external stimulus nitric oxide transport response to light stimulus cellular response to radiation response to UV cellular response to light stimulus response to radiation cellular response to UV regulation of developmental process angiogenesis regulation of vasculature development positive regulation of developmental process tube morphogenesis regulation of anatomical structure morphogenesis regulation of multicellular organismal development blood vessel morphogenesis positive regulation of angiogenesis positive regulation of vasculature development regulation of angiogenesis anatomical structure formation involved in morphogenesis wound healing response to wounding sensory perception nervous system process sensory perception of pain	ankyrin-1 complex protein-containing complex membrane membrane protein complex cellular anatomical entity apical part of cell membrane-bounded organelle intracellular anatomical structure nuclear membrane nucleus intracellular membrane-bounded organelle endomembrane system intracellular organelle organelle envelope ankyrin-1 complex protein-containing complex membrane membrane protein complex cellular anatomical entity apical part of cell membrane-bounded organelle intracellular anatomical structure nuclear membrane nucleus intracellular membrane-bounded organelle endomembrane system intracellular organelle organelle envelope organelle nuclear envelope organelle membrane extracellular exosome extracellular vesicle extracellular organelle extracellular region extracellular space vesicle extracellular membrane-bounded organelle cell periphery sarcolemma plasma membrane basal part of cell basal plasma membrane plasma membrane region basolateral plasma membrane cluster of actin-based cell projections brush border cytoplasm axon cell projection neuron projection plasma membrane bounded cell projection apical plasma membrane brush border membrane cell projection membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth D], B, C, D [auth A]	IPR023271	Aquaporin-like	Homologous Superfamily
A [auth D], B, C, D [auth A]	IPR034294	Aquaporin transporter	Family
A [auth D], B, C, D [auth A]	IPR023274	Aquaporin 1	Family
A [auth D], B, C, D [auth A]	IPR022357	Major intrinsic protein, conserved site	Conserved Site
A [auth D], B, C, D [auth A]	IPR000425	Major intrinsic protein	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A [auth D], B, C, D [auth A]	Pharos: P29972	hyperthyroidism salivary gland adenoid cystic carcinoma sarcomatoid carcinoma toxic shock syndrome carcinoma hypertensive disorder adenoid cystic carcinoma Pain autosomal recessive polycystic kidney disease choledochal cyst pancreatic intraductal papillary-mucinous neoplasm glioblastoma idiopathic pulmonary arterial hypertension pterygium lung adenocarcinoma hyperthyroidism salivary gland adenoid cystic carcinoma sarcomatoid carcinoma toxic shock syndrome carcinoma hypertensive disorder adenoid cystic carcinoma Pain autosomal recessive polycystic kidney disease choledochal cyst pancreatic intraductal papillary-mucinous neoplasm glioblastoma idiopathic pulmonary arterial hypertension pterygium lung adenocarcinoma lymphatic system disease bone disease nephrolithiasis ovarian cancer ductal breast carcinoma in situ pancreatic ductal adenocarcinoma pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia interstitial cystitis pulmonary arterial hypertension lung cancer salivary gland cancer malignant ependymoma malignant pancreatic neoplasm spinal cord injury astrocytic tumor mammary neoplasms, animal subependymal giant cell astrocytoma breast cancer non-small cell lung carcinoma transitional cell carcinoma pancreatic intraductal papillary-mucinous carcinoma gastric carcinoma pilocytic astrocytoma psoriasis invasive ductal breast carcinoma lung carcinoma malignant glioma MALT lymphoma breast carcinoma osteosarcoma undifferentiated carcinoma Down syndrome

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A [auth D], B, C, D [auth A]	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 [auth D], B, C, D [auth A]	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A [auth D], B, C, D [auth A]	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 R01GM157729.