======= SEPN1 ======= == Gene Information == * **Official Symbol**: SELENON * **Official Name**: selenoprotein N * **Aliases and Previous Symbols**: N/A * **Entrez ID**: [[https://www.ncbi.nlm.nih.gov/gene/?term=57190|57190]] * **UniProt**: [[https://www.uniprot.org/uniprot/Q9NZV5|Q9NZV5]] * **Interactions**: [[https://thebiogrid.org/search.php?search=SEPN1&organism=9606|BioGRID]] * **PubMed articles**: [[https://www.ncbi.nlm.nih.gov/pubmed/?term=gene%20SEPN1|Open PubMed]] * **OMIM**: [[https://omim.org/entry/606210|Open OMIM]] == Function Summary == * **Entrez Summary**: This gene encodes a glycoprotein that is localized in the endoplasmic reticulum. It plays an important role in cell protection against oxidative stress, and in the regulation of redox-related calcium homeostasis. Mutations in this gene are associated with early onset muscle disorders, referred to as SEPN1-related myopathy. SEPN1-related myopathy consists of 4 autosomal recessive disorders, originally thought to be separate entities: rigid spine muscular dystrophy (RSMD1), the classical form of multiminicore disease, desmin related myopathy with Mallory-body like inclusions, and congenital fiber-type disproportion (CFTD). This protein is a selenoprotein, containing the rare amino acid selenocysteine (Sec). Sec is encoded by the UGA codon, which normally signals translation termination. The 3' UTRs of selenoprotein mRNAs contain a conserved stem-loop structure, designated the Sec insertion sequence (SECIS) element, that is necessary for the recognition of UGA as a Sec codon, rather than as a stop signal. A second stop-codon redefinition element (SRE) adjacent to the UGA codon has been identified in this gene (PMID:15791204). SRE is a phylogenetically conserved stem-loop structure that stimulates readthrough at the UGA codon, and augments the Sec insertion efficiency by SECIS. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Dec 2016]. * **UniProt Summary**: Isoform 2: Plays an important role in cell protection against oxidative stress and in the regulation of redox-related calcium homeostasis. Regulates the calcium level of the ER by protecting the calcium pump ATP2A2 against the oxidoreductase ERO1A-mediated oxidative damage. Within the ER, ERO1A activity increases the concentration of H(2)O(2), which attacks the luminal thiols in ATP2A2 and thus leads to cysteinyl sulfenic acid formation (-SOH) and SEPN1 reduces the SOH back to free thiol (- SH), thus restoring ATP2A2 activity (PubMed:25452428). Acts as a modulator of ryanodine receptor (RyR) activity: protects RyR from oxidation due to increased oxidative stress, or directly controls the RyR redox state, regulating the RyR-mediated calcium mobilization required for normal muscle development and differentiation (PubMed:19557870, PubMed:18713863). {ECO:0000269|PubMed:18713863, ECO:0000269|PubMed:19557870, ECO:0000269|PubMed:25452428}. No Pfam Domain information is available for this gene. |positive regulation of response to oxidative stress| |skeletal muscle fiber development| |regulation of ryanodine-sensitive calcium-release channel activity| |myotube cell development| |myotube differentiation| |muscle fiber development| |regulation of release of sequestered calcium ion into cytosol| |regulation of response to oxidative stress| |regulation of calcium ion transmembrane transporter activity| |regulation of calcium-mediated signaling| |regulation of calcium ion transport into cytosol| |oxidoreductase activity| |skeletal muscle tissue development| |regulation of sequestering of calcium ion| |skeletal muscle organ development| |striated muscle cell development| |regulation of calcium ion transmembrane transport| |muscle cell development| |regulation of cation channel activity| |striated muscle cell differentiation| |muscle cell differentiation| |regulation of calcium ion transport| |regulation of ion transmembrane transporter activity| |regulation of transmembrane transporter activity| |regulation of transporter activity| |striated muscle tissue development| |muscle organ development| |muscle tissue development| |regulation of cation transmembrane transport| |regulation of metal ion transport| |calcium ion homeostasis| |muscle structure development| |regulation of ion transmembrane transport| |divalent inorganic cation homeostasis| |regulation of transmembrane transport| |metal ion homeostasis| |regulation of ion transport| |cation homeostasis| |inorganic ion homeostasis| |calcium ion binding| |ion homeostasis| |regulation of cellular localization| |endoplasmic reticulum membrane| |oxidation-reduction process| |chemical homeostasis| |regulation of response to stress| |homeostatic process| |cell development| |tissue development| |regulation of intracellular signal transduction| |regulation of transport| \\ === CRISPR Data === No hits were found. No correlation found to any other genes in chemogenomics. Global Fraction of Cell Lines Where Essential: 0/739 ^Tissue^Fraction Of Cell Lines Where Essential^ |1290807.0|0/1| |909776.0|0/1| |bile duct|0/28| |blood|0/28| |bone|0/26| |breast|0/33| |central nervous system|0/56| |cervix|0/4| |colorectal|0/17| |esophagus|0/13| |fibroblast|0/1| |gastric|0/16| |kidney|0/21| |liver|0/20| |lung|0/75| |lymphocyte|0/16| |ovary|0/26| |pancreas|0/24| |peripheral nervous system|0/16| |plasma cell|0/15| |prostate|0/1| |skin|0/24| |soft tissue|0/9| |thyroid|0/2| |upper aerodigestive|0/22| |urinary tract|0/29| |uterus|0/5| == Essentiality in NALM6 == * **Essentiality Rank**: 3935 * **Expression level (log2 read counts)**: 5.06 {{:chemogenomics:nalm6 dist.png?nolink |}}