2KQ6

The structure of the EF-hand domain of polycystin-2 suggests a mechanism for Ca2+-dependent regulation of polycystin-2 channel activity

External Resource: Annotation

Domain Annotation: ECOD Classification
Domain Annotation: CATH
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	EF-hand_7_3	e2kq6A1	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_3	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.238.10	Mainly Alpha	Orthogonal Bundle	Recoverin	domain 1	CATH (4.3.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Polycystin-2	cytoskeletal protein binding protein binding binding alpha-actinin binding actinin binding muscle alpha-actinin binding monoatomic cation transmembrane transporter activity gated channel activity monoatomic ion channel activity potassium ion transmembrane transporter activity voltage-gated channel activity voltage-gated monoatomic ion channel activity potassium channel activity voltage-gated monoatomic cation channel activity cytoskeletal protein binding protein binding binding alpha-actinin binding actinin binding muscle alpha-actinin binding monoatomic cation transmembrane transporter activity gated channel activity monoatomic ion channel activity potassium ion transmembrane transporter activity voltage-gated channel activity voltage-gated monoatomic ion channel activity potassium channel activity voltage-gated monoatomic cation channel activity monoatomic cation channel activity passive transmembrane transporter activity voltage-gated potassium channel activity inorganic molecular entity transmembrane transporter activity channel activity inorganic cation transmembrane transporter activity monoatomic ion transmembrane transporter activity transporter activity metal ion transmembrane transporter activity transmembrane transporter activity cation binding ion binding calcium ion binding metal ion binding small molecule binding signaling receptor binding voltage-gated sodium channel activity sodium channel activity sodium ion transmembrane transporter activity identical protein binding protein homodimerization activity protein dimerization activity calcium-induced calcium release activity calcium channel activity intracellularly ligand-gated monoatomic ion channel activity intracellularly gated calcium channel activity ligand-gated channel activity ligand-gated monoatomic ion channel activity calcium ion transmembrane transporter activity ligand-gated calcium channel activity ligand-gated monoatomic cation channel activity outward rectifier potassium channel activity molecular function inhibitor activity molecular function regulator activity transcription regulator inhibitor activity phosphoprotein binding HLH domain binding protein domain specific binding ATPase binding enzyme binding voltage-gated calcium channel activity transmembrane transporter binding	multicellular organismal process kidney epithelium development metanephric epithelium development nephron tubule development metanephric distal tubule development renal system development multicellular organism development metanephros development anatomical structure development renal tubule development nephron development metanephric nephron epithelium development nephron epithelium development system development multicellular organismal process kidney epithelium development metanephric epithelium development nephron tubule development metanephric distal tubule development renal system development multicellular organism development metanephros development anatomical structure development renal tubule development nephron development metanephric nephron epithelium development nephron epithelium development system development developmental process epithelium development tube development metanephric nephron tubule development animal organ development tissue development distal tubule development metanephric tubule development kidney development regulation of biosynthetic process regulation of nitric oxide biosynthetic process regulation of biological process biological regulation positive regulation of biological process reactive nitrogen species metabolic process positive regulation of nitric oxide metabolic process nitric oxide metabolic process positive regulation of metabolic process nitric oxide biosynthetic process biosynthetic process positive regulation of biosynthetic process metabolic process regulation of nitric oxide metabolic process positive regulation of nitric oxide biosynthetic process regulation of metabolic process mesonephric epithelium development mesonephros development mesonephric tubule development heart development circulatory system development transport monoatomic ion transmembrane transport potassium ion transmembrane transport inorganic ion transmembrane transport establishment of localization metal ion transport inorganic cation transmembrane transport transmembrane transport monoatomic cation transmembrane transport localization monoatomic ion transport potassium ion transport cellular process monoatomic cation transport regulation of calcium ion transmembrane transporter activity regulation of calcium ion transport regulation of localization regulation of cellular process negative regulation of ion transmembrane transporter activity negative regulation of calcium ion transmembrane transporter activity intracellular calcium ion homeostasis negative regulation of biological process negative regulation of ryanodine-sensitive calcium-release channel activity negative regulation of transport calcium ion transport negative regulation of cation transmembrane transport monoatomic cation homeostasis intracellular monoatomic ion homeostasis regulation of release of sequestered calcium ion into cytosol regulation of monoatomic ion transport regulation of cation channel activity maintenance of location regulation of molecular function release of sequestered calcium ion into cytosol regulation of transmembrane transport chemical homeostasis negative regulation of calcium ion transmembrane transport cellular localization inorganic ion homeostasis negative regulation of cation channel activity homeostatic process negative regulation of monoatomic ion transport regulation of transmembrane transporter activity calcium ion homeostasis regulation of monoatomic ion transmembrane transport negative regulation of sequestering of calcium ion negative regulation of transmembrane transport regulation of transporter activity maintenance of location in cell regulation of calcium ion transmembrane transport positive regulation of sequestering of calcium ion negative regulation of monoatomic ion transmembrane transport negative regulation of release of sequestered calcium ion into cytosol intracellular monoatomic cation homeostasis negative regulation of cellular process monoatomic ion homeostasis intracellular chemical homeostasis regulation of metal ion transport regulation of sequestering of calcium ion positive regulation of cellular process regulation of monoatomic ion transmembrane transporter activity calcium ion transmembrane import into cytosol regulation of transport sequestering of calcium ion negative regulation of transporter activity negative regulation of molecular function negative regulation of calcium ion transport cellular homeostasis regulation of ryanodine-sensitive calcium-release channel activity regulation of monoatomic cation transmembrane transport calcium ion transmembrane transport microtubule organizing center organization microtubule cytoskeleton organization cellular component organization centrosome duplication organelle organization centrosome cycle microtubule-based process cell cycle cellular component organization or biogenesis cytoskeleton organization cell cycle process cellular response to stimulus positive regulation of cell communication positive regulation of cation transmembrane transport positive regulation of calcium ion transport positive regulation of signal transduction response to stimulus regulation of inositol 1,4,5-trisphosphate-sensitive calcium-release channel activity regulation of signal transduction cell communication positive regulation of monoatomic ion transport positive regulation of monoatomic ion transmembrane transport signal transduction positive regulation of cation channel activity regulation of response to stimulus signaling positive regulation of response to stimulus positive regulation of molecular function positive regulation of calcium ion transmembrane transporter activity positive regulation of calcium ion transmembrane transport positive regulation of transmembrane transport positive regulation of release of sequestered calcium ion into cytosol regulation of signaling positive regulation of inositol 1,4,5-trisphosphate-sensitive calcium-release channel activity positive regulation of transport positive regulation of transporter activity positive regulation of ion transmembrane transporter activity regulation of cell communication positive regulation of signaling cellular response to inorganic substance cellular response to metal ion response to inorganic substance cellular response to chemical stimulus response to metal ion response to chemical cellular response to calcium ion response to calcium ion cellular response to stress response to stress response to fluid shear stress cellular response to fluid shear stress response to osmotic stress cellular response to chemical stress cellular response to osmotic stress cellular response to environmental stimulus response to abiotic stimulus cellular response to abiotic stimulus spinal cord development central nervous system development nervous system development gland development pattern specification process liver development regionalization determination of liver left/right asymmetry hepaticobiliary system development determination of bilateral symmetry determination of left/right symmetry left/right pattern formation specification of symmetry detection of external stimulus detection of stimulus detection of mechanical stimulus response to mechanical stimulus response to external stimulus detection of abiotic stimulus placenta development chordate embryonic development embryo development in utero embryonic development embryonic placenta development embryo development ending in birth or egg hatching embryonic organ development renal cortex development mesenchyme development metanephric cortex development cellular response to acid chemical response to oxygen-containing compound response to water cellular response to oxygen-containing compound response to acid chemical cellular response to hydrostatic pressure cellular response to water stimulus response to hydrostatic pressure establishment of localization in cell sodium ion transmembrane transport sodium ion transport cell population proliferation regulation of cell population proliferation cell surface receptor signaling pathway Wnt signaling pathway metanephric mesenchyme development kidney mesenchyme development nephron morphogenesis metanephric nephron morphogenesis S-shaped body morphogenesis metanephric S-shaped body morphogenesis kidney morphogenesis anatomical structure morphogenesis metanephros morphogenesis animal organ morphogenesis metanephric nephron development response to endogenous stimulus detection of nodal flow detection of endogenous stimulus renal artery morphogenesis blood vessel morphogenesis artery development kidney vasculature development vasculature development renal system vasculature development tube morphogenesis artery morphogenesis kidney vasculature morphogenesis renal system vasculature morphogenesis blood vessel development regulation of calcium ion import calcium ion import cellular component biogenesis cellular component assembly protein-containing complex organization protein complex oligomerization protein tetramerization protein-containing complex assembly smooth muscle tissue development metanephric smooth muscle tissue development muscle tissue development kidney smooth muscle tissue development cellular biosynthetic process positive regulation of cellular metabolic process positive regulation of macromolecule biosynthetic process organic substance metabolic process organic substance biosynthetic process positive regulation of macromolecule metabolic process cellular metabolic process regulation of cellular metabolic process regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process regulation of cellular biosynthetic process regulation of gene expression positive regulation of gene expression regulation of macromolecule biosynthetic process macromolecule metabolic process positive regulation of cellular biosynthetic process nephric duct development mesonephric duct development aorta development placenta blood vessel development loop of Henle development metanephric loop of Henle development metanephric ascending thin limb development ascending thin limb development branching morphogenesis of an epithelial tube nephron tubule morphogenesis nephron epithelium morphogenesis ureteric bud morphogenesis branching involved in ureteric bud morphogenesis epithelial tube morphogenesis ureteric bud development morphogenesis of an epithelium tissue morphogenesis morphogenesis of a branching structure mesonephric tubule morphogenesis renal tubule morphogenesis morphogenesis of a branching epithelium regulation of primary metabolic process nucleobase-containing compound metabolic process DNA-templated transcription regulation of RNA metabolic process transcription by RNA polymerase II regulation of nucleobase-containing compound metabolic process regulation of transcription by RNA polymerase II positive regulation of nucleobase-containing compound metabolic process primary metabolic process positive regulation of transcription by RNA polymerase II positive regulation of RNA metabolic process organic cyclic compound metabolic process organic cyclic compound biosynthetic process regulation of DNA-templated transcription positive regulation of DNA-templated transcription RNA metabolic process RNA biosynthetic process nucleic acid biosynthetic process regulation of RNA biosynthetic process nucleobase-containing compound biosynthetic process nucleic acid metabolic process positive regulation of RNA biosynthetic process heart morphogenesis embryonic heart tube development embryonic heart tube morphogenesis heart looping embryonic organ morphogenesis embryonic morphogenesis determination of heart left/right asymmetry positive regulation of cytosolic calcium ion concentration regulation of biological quality protein heterotetramerization protein heterooligomerization protein homotetramerization protein homooligomerization cellular response to nitrogen compound response to organic substance response to organonitrogen compound response to organophosphorus cellular response to organic cyclic compound response to nitrogen compound response to purine-containing compound response to cAMP cellular response to endogenous stimulus cellular response to organonitrogen compound cellular response to cAMP cellular response to organic substance response to organic cyclic compound cortical collecting duct development metanephric cortical collecting duct development cellular response to oxidative stress response to reactive oxygen species cellular response to reactive oxygen species response to oxidative stress negative regulation of cell population proliferation regulation of cell cycle phase transition negative regulation of cell cycle cell cycle phase transition regulation of cell cycle G1/S phase transition cell cycle G1/S phase transition mitotic cell cycle negative regulation of mitotic cell cycle regulation of mitotic cell cycle negative regulation of cell cycle phase transition regulation of cell cycle negative regulation of G1/S transition of mitotic cell cycle negative regulation of mitotic cell cycle phase transition regulation of cell cycle process negative regulation of cell cycle G1/S phase transition negative regulation of cell cycle process regulation of mitotic cell cycle phase transition mitotic cell cycle process regulation of G1/S transition of mitotic cell cycle G1/S transition of mitotic cell cycle mitotic cell cycle phase transition plasma membrane bounded cell projection organization cell projection organization cilium organization metanephric part of ureteric bud development neural tube development cell surface receptor signaling pathway via STAT cell surface receptor signaling pathway via JAK-STAT	cell-cell junction anchoring junction cell junction cellular anatomical entity intracellular anatomical structure cytoplasm cytosol membrane-bounded organelle organelle subcompartment cytoplasmic side of membrane membrane intracellular membrane-bounded organelle endomembrane system side of membrane cell-cell junction anchoring junction cell junction cellular anatomical entity intracellular anatomical structure cytoplasm cytosol membrane-bounded organelle organelle subcompartment cytoplasmic side of membrane membrane intracellular membrane-bounded organelle endomembrane system side of membrane endoplasmic reticulum subcompartment intracellular organelle organelle nuclear outer membrane-endoplasmic reticulum membrane network endoplasmic reticulum cytoplasmic side of endoplasmic reticulum membrane organelle membrane endoplasmic reticulum membrane cilium plasma membrane bounded cell projection ciliary basal body cell projection microtubule organizing center cytoskeleton intracellular non-membrane-bounded organelle microtubule cytoskeleton non-membrane-bounded organelle cell periphery basal part of cell plasma membrane basal plasma membrane plasma membrane region motile cilium non-motile cilium ciliary membrane bounding membrane of organelle cell projection membrane migrasome intracellular vesicle cytoplasmic vesicle membrane vesicle membrane cytoplasmic vesicle vesicle lumenal side of endoplasmic reticulum membrane lumenal side of membrane cell leading edge lamellipodium extracellular exosome extracellular vesicle extracellular organelle extracellular region extracellular space extracellular membrane-bounded organelle basolateral plasma membrane Golgi apparatus protein-containing complex polycystin complex cell cortex cell cortex region cytoplasmic region basal cortex mitotic spindle spindle transmembrane transporter complex membrane protein complex cation channel complex transporter complex monoatomic ion channel complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR002048	EF-hand domain	Domain
A	IPR003915	Polycystic kidney disease type 2 protein	Family
A	IPR027359	Voltage-dependent channel domain superfamily	Homologous Superfamily
A	IPR013122	Polycystin cation channel, PKD1/PKD2	Domain
A	IPR046791	Polycystin domain	Domain
A	IPR011992	EF-hand domain pair	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: Q13563	polycystic kidney disease 2 retinal disease autosomal dominant polycystic kidney disease Liver Cirrhosis, Experimental vascular disease ovarian cancer Pick disease cerebrovascular disorder Ehlers-Danlos syndrome neurodegenerative disease pancreatic intraductal papillary-mucinous carcinoma polycystic kidney disease thoracic aortic aneurysm breast cancer Emery-Dreifuss muscular dystrophy polycystic kidney disease 2 retinal disease autosomal dominant polycystic kidney disease Liver Cirrhosis, Experimental vascular disease ovarian cancer Pick disease cerebrovascular disorder Ehlers-Danlos syndrome neurodegenerative disease pancreatic intraductal papillary-mucinous carcinoma polycystic kidney disease thoracic aortic aneurysm breast cancer Emery-Dreifuss muscular dystrophy invasive ductal breast carcinoma malignant mesothelioma pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia progressive supranuclear palsy breast carcinoma gout kidney disease nephrolithiasis

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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.