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General description of the gene and the encoded protein(s) using information from HGNC and Ensembl, as well as predictions made by the Human Protein Atlas project.
Gene namei
Official gene symbol, which is typically a short form of the gene name, according to HGNC.
Assigned HPA protein class(es) for the encoded protein(s).
Disease related genes Human disease related genes Plasma proteins Potential drug targets Transporters
Predicted locationi
All transcripts of all genes have been analyzed regarding the location(s) of corresponding protein based on prediction methods for signal peptides and transmembrane regions.
Genes with at least one transcript predicted to encode a secreted protein, according to prediction methods or to UniProt location data, have been further annotated and classified with the aim to determine if the corresponding protein(s) are secreted or actually retained in intracellular locations or membrane-attached.
Remaining genes, with no transcript predicted to encode a secreted protein, will be assigned the prediction-based location(s).
The annotated location overrules the predicted location, so that a gene encoding a predicted secreted protein that has been annotated as intracellular will have intracellular as the final location.
Gene information from Ensembl and Entrez, as well as links to available gene identifiers are displayed here. Information was retrieved from Ensembl if not indicated otherwise.
Chromosome
3
Cytoband
p26.1
Chromosome location (bp)
4493345 - 4847506
Number of transcriptsi
Number of protein-coding transcripts from the gene as defined by Ensembl.
Useful information about the protein provided by UniProt.
Inositol 1,4,5-trisphosphate-gated calcium channel that, upon inositol 1,4,5-trisphosphate binding, mediates calcium release from the endoplasmic reticulum (ER) 1,2. Undergoes conformational changes upon ligand binding, suggesting structural flexibility that allows the channel to switch from a closed state, capable of interacting with its ligands such as 1,4,5-trisphosphate and calcium, to an open state, capable of transferring calcium ions across the ER membrane (By similarity). Cytoplasmic calcium released from the ER triggers apoptosis by the activation of CAMK2 complex (By similarity). Involved in the regulation of epithelial secretion of electrolytes and fluid through the interaction with AHCYL1 (By similarity). Part of a complex composed of HSPA9, ITPR1 and VDAC1 that regulates mitochondrial calcium-dependent apoptosis by facilitating calcium transport from the ER lumen to the mitochondria intermembrane space thus providing calcium for the downstream calcium channel MCU that directly releases it into mitochondria matrix (By similarity). Regulates fertilization and egg activation by tuning the frequency and amplitude of calcium oscillations (By similarity)....show less
Molecular function (UniProt)i
Keywords assigned by UniProt to proteins due to their particular molecular function.
Calcium channel, Ion channel, Ligand-gated ion channel, Receptor
Biological process (UniProt)i
Keywords assigned by UniProt to proteins because they are involved in a particular biological process.
Apoptosis, Calcium transport, Ion transport, Transport
Ligand (UniProt)i
Keywords assigned by UniProt to proteins because they bind, are associated with, or whose activity is dependent of some molecule.
This gene encodes an intracellular receptor for inositol 1,4,5-trisphosphate. Upon stimulation by inositol 1,4,5-trisphosphate, this receptor mediates calcium release from the endoplasmic reticulum. Mutations in this gene cause spinocerebellar ataxia type 15, a disease associated with an heterogeneous group of cerebellar disorders. Multiple transcript variants have been identified for this gene. [provided by RefSeq, Nov 2009]...show less
PROTEIN INFORMATIONi
The protein information section displays alternative protein-coding transcripts (splice variants) encoded by this gene according to the Ensembl database.
The Splice variant identifier links to the Ensembl website protein summary for the selected splice variant. The data in the Swissprot and TrEMBL columns links to corresponding pages in the UniProt database.
The protein classes assigned to this protein are shown if expanding the data in the protein class column. Parent protein classes are in bold font and subclasses are listed under the parent class.
The length of the protein (amino acid residues according to Ensembl), molecular mass (kDalton), predicted signal peptide and number of predicted transmembrane region(s) according to in-house majority decision methods based on sets of predictors are also reported.
Predicted intracellular proteins Intracellular proteins predicted by MDM and MDSEC Human disease related genes Nervous system diseases Neurodegenerative diseases Protein evidence (Ezkurdia et al 2014)
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GO:0005220[inositol 1,4,5-trisphosphate-sensitive calcium-release channel activity] GO:0005262[calcium channel activity] GO:0005783[endoplasmic reticulum] GO:0005789[endoplasmic reticulum membrane] GO:0006811[ion transport] GO:0006816[calcium ion transport] GO:0016020[membrane] GO:0048016[inositol phosphate-mediated signaling] GO:0051209[release of sequestered calcium ion into cytosol] GO:0055085[transmembrane transport] GO:0070588[calcium ion transmembrane transport] GO:0070679[inositol 1,4,5 trisphosphate binding]
A0A3B3ISR4 [Direct mapping] Inositol 1,4,5-trisphosphate receptor type 1
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Predicted intracellular proteins Intracellular proteins predicted by MDM and MDSEC Human disease related genes Nervous system diseases Neurodegenerative diseases Protein evidence (Ezkurdia et al 2014)
A0A3B3ISE3 [Direct mapping] Inositol 1,4,5-trisphosphate receptor type 1
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Predicted intracellular proteins Intracellular proteins predicted by MDM and MDSEC Human disease related genes Nervous system diseases Neurodegenerative diseases Protein evidence (Ezkurdia et al 2014)
A0A3B3IS59 [Direct mapping] Inositol 1,4,5-trisphosphate receptor type 1
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Predicted intracellular proteins Intracellular proteins predicted by MDM and MDSEC Human disease related genes Nervous system diseases Neurodegenerative diseases Protein evidence (Ezkurdia et al 2014)
The Human Protein Atlas project is funded
