Protein: Inositol 1,4,5-trisphosphate-gated calcium channel ITPR1 (IP3 receptor isoform 1) (IP3R 1) (InsP3R1) (Inositol 1,4,5 trisphosphate receptor) (Inositol 1,4,5-trisphosphate receptor type 1) (Type 1 inositol 1,4,5-trisphosphate receptor) (Type 1 InsP3 receptor) (Q14643)
Organism: Homo sapiens (Human)
Function: Intracellular channel that mediates calcium release from the endoplasmic reticulum following stimulation by inositol 1,4,5-trisphosphate. Involved in the regulation of epithelial secretion of electrolytes and fluid through the interaction with AHCYL1 (By similarity). Plays a role in ER stress-induced apoptosis. Cytoplasmic calcium released from the ER triggers apoptosis by the activation of CaM kinase II, eventually leading to the activation of downstream apoptosis pathways (By similarity).
Subcellular location: Endoplasmic reticulum membrane {ECO:0000305|PubMed:27108798, ECO:0000305|PubMed:7852357}; Multi-pass membrane protein {ECO:0000250|UniProtKB:P29994, ECO:0000255}. Cytoplasmic vesicle, secretory vesicle membrane {ECO:0000250|UniProtKB:Q9TU34}; Multi-pass membrane protein {ECO:0000250|UniProtKB:P29994, ECO:0000255}. Cytoplasm, perinuclear region {ECO:0000269|PubMed:27108798}. Note=Found in a complex with HSPA9 and VDAC1 at the endoplasmic reticulum-mitochondria contact sites. {ECO:0000250|UniProtKB:P29994}.
Sequence: MSDKMSSFLHIGDICSLYAEGSTNGFISTLGLVDDRCVVQPETGDLNNPPKKFRDCLFKLCPMNRYSAQKQFWKAAKPGANSTTDAVLLNKLHHAADLEKKQNETENRKLLGTVIQYGNVIQLLHLKSNKYLTVNKRLPALLEKNAMRVTLDEAGNEGSWFYIQPFYKLRSIGDSVVIGDKVVLNPVNAGQPLHASSHQLVDNPGCNEVNSVNCNTSWKIVLFMKWSDNKDDILKGGDVVRLFHAEQEKFLTCDEHRKKQHVFLRTTGRQSATSATSSKALWEVEVVQHDPCRGGAGYWNSLFRFKHLATGHYLAAEVDPDFEEECLEFQPSVDPDQDASRSRLRNAQEKMVYSLVSVPEGNDISSIFELDPTTLRGGDSLVPRNSYVRLRHLCTNTWVHSTNIPIDKEEEKPVMLKIGTSPVKEDKEAFAIVPVSPAEVRDLDFANDASKVLGSIAGKLEKGTITQNERRSVTKLLEDLVYFVTGGTNSGQDVLEVVFSKPNRERQKLMREQNILKQIFKLLQAPFTDCGDGPMLRLEELGDQRHAPFRHICRLCYRVLRHSQQDYRKNQEYIAKQFGFMQKQIGYDVLAEDTITALLHNNRKLLEKHITAAEIDTFVSLVRKNREPRFLDYLSDLCVSMNKSIPVTQELICKAVLNPTNADILIETKLVLSRFEFEGVSSTGENALEAGEDEEEVWLFWRDSNKEIRSKSVRELAQDAKEGQKEDRDVLSYYRYQLNLFARMCLDRQYLAINEISGQLDVDLILRCMSDENLPYDLRASFCRLMLHMHVDRDPQEQVTPVKYARLWSEIPSEIAIDDYDSSGASKDEIKERFAQTMEFVEEYLRDVVCQRFPFSDKEKNKLTFEVVNLARNLIYFGFYNFSDLLRLTKILLAILDCVHVTTIFPISKMAKGEENKGNNDVEKLKSSNVMRSIHGVGELMTQVVLRGGGFLPMTPMAAAPEGNVKQAEPEKEDIMVMDTKLKIIEILQFILNVRLDYRISCLLCIFKREFDESNSQTSETSSGNSSQEGPSNVPGALDFEHIEEQAEGIFGGSEENTPLDLDDHGGRTFLRVLLHLTMHDYPPLVSGALQLLFRHFSQRQEVLQAFKQVQLLVTSQDVDNYKQIKQDLDQLRSIVEKSELWVYKGQGPDETMDGASGENEHKKTEEGNNKPQKHESTSSYNYRVVKEILIRLSKLCVQESASVRKSRKQQQRLLRNMGAHAVVLELLQIPYEKAEDTKMQEIMRLAHEFLQNFCAGNQQNQALLHKHINLFLNPGILEAVTMQHIFMNNFQLCSEINERVVQHFVHCIETHGRNVQYIKFLQTIVKAEGKFIKKCQDMVMAELVNSGEDVLVFYNDRASFQTLIQMMRSERDRMDENSPLMYHIHLVELLAVCTEGKNVYTEIKCNSLLPLDDIVRVVTHEDCIPEVKIAYINFLNHCYVDTEVEMKEIYTSNHMWKLFENFLVDICRACNNTSDRKHADSILEKYVTEIVMSIVTTFFSSPFSDQSTTLQTRQPVFVQLLQGVFRVYHCNWLMPSQKASVESCIRVLSDVAKSRAIAIPVDLDSQVNNLFLKSHSIVQKTAMNWRLSARNAARRDSVLAASRDYRNIIERLQDIVSALEDRLRPLVQAELSVLVDVLHRPELLFPENTDARRKCESGGFICKLIKHTKQLLEENEEKLCIKVLQTLREMMTKDRGYGEKLISIDELDNAELPPAPDSENATEELEPSPPLRQLEDHKRGEALRQVLVNRYYGNVRPSGRRESLTSFGNGPLSAGGPGKPGGGGGGSGSSSMSRGEMSLAEVQCHLDKEGASNLVIDLIMNASSDRVFHESILLAIALLEGGNTTIQHSFFCRLTEDKKSEKFFKVFYDRMKVAQQEIKATVTVNTSDLGNKKKDDEVDRDAPSRKKAKEPTTQITEEVRDQLLEASAATRKAFTTFRREADPDDHYQPGEGTQATADKAKDDLEMSAVITIMQPILRFLQLLCENHNRDLQNFLRCQNNKTNYNLVCETLQFLDCICGSTTGGLGLLGLYINEKNVALINQTLESLTEYCQGPCHENQNCIATHESNGIDIITALILNDINPLGKKRMDLVLELKNNASKLLLAIMESRHDSENAERILYNMRPKELVEVIKKAYMQGEVEFEDGENGEDGAASPRNVGHNIYILAHQLARHNKELQSMLKPGGQVDGDEALEFYAKHTAQIEIVRLDRTMEQIVFPVPSICEFLTKESKLRIYYTTERDEQGSKINDFFLRSEDLFNEMNWQKKLRAQPVLYWCARNMSFWSSISFNLAVLMNLLVAFFYPFKGVRGGTLEPHWSGLLWTAMLISLAIVIALPKPHGIRALIASTILRLIFSVGLQPTLFLLGAFNVCNKIIFLMSFVGNCGTFTRGYRAMVLDVEFLYHLLYLVICAMGLFVHEFFYSLLLFDLVYREETLLNVIKSVTRNGRSIILTAVLALILVYLFSIVGYLFFKDDFILEVDRLPNETAVPETGESLASEFLFSDVCRVESGENCSSPAPREELVPAEETEQDKEHTCETLLMCIVTVLSHGLRSGGGVGDVLRKPSKEEPLFAARVIYDLLFFFMVIIIVLNLIFGVIIDTFADLRSEKQKKEEILKTTCFICGLERDKFDNKTVTFEEHIKEEHNMWHYLCFIVLVKVKDSTEYTGPESYVAEMIKERNLDWFPRMRAMSLVSSDSEGEQNELRNLQEKLESTMKLVTNLSGQLSELKDQMTEQRKQKQRIGLLGHPPHMNVNPQQPA
InterPro domains: - IPR016024: Armadillo-type fold (homologous_superfamily) [1242-2084]
- IPR000699: RIH domain (domain) [474-1352]
- IPR000493: Inositol 1,4,5-trisphosphate receptor (family) [51-890]
- IPR016093: MIR motif (domain) [112-435]
- IPR015925: Ryanodine/Inositol 1,4,5-trisphosphate receptor (family) [5-2741]
- IPR035910: RyR/IP3 receptor binding core, RIH domain superfamily (homologous_superfamily) [437-1290]
- IPR014821: Inositol 1,4,5-trisphosphate/ryanodine receptor (domain) [5-229]
- IPR013662: RyR/IP3R Homology associated domain (domain) [1971-2077]
- IPR036300: Mir domain superfamily (homologous_superfamily) [108-435]
- IPR005821: Ion transport domain (domain) [2363-2608]
Interaction partners: - Beclin-1
- Apoptosis regulator Bcl-2
- Ataxin-3-like protein
- Ataxin-2
- Non-selective voltage-gated ion channel VDAC1
- Ataxin-3
- Huntingtin
- Stress-70 protein, mitochondrial
- Inositol 1,4,5-triphosphate receptor associated 1
- Cytochrome c
Gene Ontology annotations:
Molecular Function (MF): GO:0003674 (molecular function), GO:0098772 (molecular function regulator activity), GO:0005488 (binding), GO:0005215 (transporter activity), GO:0036094 (small molecule binding), GO:0140677 (molecular function activator activity), GO:0022857 (transmembrane transporter activity), GO:0043167 (ion binding), GO:0005515 (protein binding), GO:0043178 (alcohol binding), GO:0015075 (monoatomic ion transmembrane transporter activity), GO:0043168 (anion binding), GO:0022803 (passive transmembrane transporter activity), GO:1901702 (salt transmembrane transporter activity), GO:0015318 (inorganic molecular entity transmembrane transporter activity), GO:0015267 (channel activity), GO:0008324 (monoatomic cation transmembrane transporter activity), GO:0005216 (monoatomic ion channel activity), GO:0022890 (inorganic cation transmembrane transporter activity), GO:0015085 (calcium ion transmembrane transporter activity), GO:0005262 (calcium channel activity), GO:0046873 (metal ion transmembrane transporter activity), GO:0005261 (monoatomic cation channel activity), GO:0022839 (monoatomic ion gated channel activity), GO:0022836 (gated channel activity), GO:0099094 (ligand-gated monoatomic cation channel activity), GO:0022834 (ligand-gated channel activity), GO:0015276 (ligand-gated monoatomic ion channel activity), GO:0099604 (ligand-gated calcium channel activity), GO:0005217 (intracellular ligand-gated monoatomic ion channel activity), GO:0015278 (calcium-release channel activity)
Biological Process (BP): GO:0008150 (biological process), GO:0050896 (response to stimulus), GO:0050789 (regulation of biological process), GO:0009987 (cellular process), GO:0023052 (signaling), GO:0065007 (biological regulation), GO:0051716 (cellular response to stimulus), GO:0009628 (response to abiotic stimulus), GO:0007154 (cell communication), GO:0007165 (signal transduction), GO:0006950 (response to stress), GO:0050794 (regulation of cellular process), GO:0001666 (response to hypoxia), GO:0070482 (response to oxygen levels), GO:0036293 (response to decreased oxygen levels)
Cellular Component (CC): GO:0005575 (cellular component), GO:0032991 (protein-containing complex), GO:0110165 (cellular anatomical entity), GO:0005622 (intracellular anatomical structure), GO:0043226 (organelle), GO:0016020 (membrane), GO:0031974 (membrane-enclosed lumen), GO:0071944 (cell periphery), GO:0031984 (organelle subcompartment), GO:0043235 (receptor complex), GO:0005737 (cytoplasm), GO:0012505 (endomembrane system), GO:0005654 (nucleoplasm), GO:0031090 (organelle membrane), GO:0043229 (intracellular organelle), GO:0016528 (sarcoplasm), GO:0098827 (endoplasmic reticulum subcompartment), GO:0042175 (nuclear outer membrane-endoplasmic reticulum membrane network), GO:0043233 (organelle lumen), GO:0005783 (endoplasmic reticulum), GO:0043227 (membrane-bounded organelle), GO:0005886 (plasma membrane), GO:0016529 (sarcoplasmic reticulum), GO:0043231 (intracellular membrane-bounded organelle), GO:0098588 (bounding membrane of organelle), GO:0005789 (endoplasmic reticulum membrane), GO:0070013 (intracellular organelle lumen), GO:0033017 (sarcoplasmic reticulum membrane), GO:0005634 (nucleus), GO:0031981 (nuclear lumen)