SEPN1
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Selenoprotein N is a protein that in humans is encoded by the SEPN1 gene.[3][4]
Function
This gene encodes a selenoprotein, which contains a selenocysteine (Sec) residue at its active site. The selenocysteine is encoded by the UGA codon that normally signals translation termination. The 3' UTR of selenoprotein genes have a common stem-loop structure, the sec insertion sequence (SECIS), that is necessary for the recognition of UGA as a Sec codon rather than as a stop signal. Mutations in this gene cause the classical phenotype of multiminicore disease and congenital muscular dystrophy with spinal rigidity and restrictive respiratory syndrome. Two alternatively spliced transcript variants encoding distinct isoforms have been found for this gene.[4]
Model organisms
| Characteristic | Phenotype |
|---|---|
| Homozygote viability | Normal |
| Fertility | Normal |
| Body weight | Normal |
| Anxiety | Normal |
| Neurological assessment | Normal |
| Grip strength | Normal |
| Hot plate | Normal |
| Dysmorphology | Normal |
| Indirect calorimetry | Normal |
| Glucose tolerance test | Normal |
| Auditory brainstem response | Normal |
| DEXA | Normal |
| Radiography | Abnormal[5] |
| Body temperature | Normal |
| Eye morphology | Normal |
| Clinical chemistry | Normal |
| Haematology | Normal |
| Peripheral blood lymphocytes | Normal |
| Micronucleus test | Normal |
| Heart weight | Normal |
| Skin Histopathology | Normal |
| Brain histopathology | Normal |
| Eye Histopathology | Normal |
| Salmonella infection | Normal[6] |
| Citrobacter infection | Normal[7] |
| All tests and analysis from[8][9] |
Model organisms have been used in the study of SEPN1 function. A conditional knockout mouse line, called Sepn1tm1a(KOMP)Wtsi[10][11] was generated as part of the International Knockout Mouse Consortium program — a high-throughput mutagenesis project to generate and distribute animal models of disease to interested scientists.[12][13][14]
Male and female animals underwent a standardized phenotypic screen to determine the effects of deletion.[8][15] Twenty five tests were carried out on homozygous mutant mice and one significant abnormality was observed: than animals displayed vertebral fusion.[8]
References
- ↑ "Human PubMed Reference:".
- ↑ "Mouse PubMed Reference:".
- ↑ Lescure A, Gautheret D, Carbon P, Krol A (Dec 1999). "Novel selenoproteins identified in silico and in vivo by using a conserved RNA structural motif". The Journal of Biological Chemistry. 274 (53): 38147–54. doi:10.1074/jbc.274.53.38147. PMID 10608886.
- 1 2 "Entrez Gene: SEPN1 selenoprotein N, 1".
- ↑ "Radiography data for Sepn1". Wellcome Trust Sanger Institute.
- ↑ "Salmonella infection data for Sepn1". Wellcome Trust Sanger Institute.
- ↑ "Citrobacter infection data for Sepn1". Wellcome Trust Sanger Institute.
- 1 2 3 Gerdin AK (2010). "The Sanger Mouse Genetics Programme: High throughput characterisation of knockout mice". Acta Ophthalmologica. 88: 925–7. doi:10.1111/j.1755-3768.2010.4142.x.
- ↑ Mouse Resources Portal, Wellcome Trust Sanger Institute.
- ↑ "International Knockout Mouse Consortium".
- ↑ "Mouse Genome Informatics".
- ↑ Skarnes WC, Rosen B, West AP, Koutsourakis M, Bushell W, Iyer V, Mujica AO, Thomas M, Harrow J, Cox T, Jackson D, Severin J, Biggs P, Fu J, Nefedov M, de Jong PJ, Stewart AF, Bradley A (Jun 2011). "A conditional knockout resource for the genome-wide study of mouse gene function". Nature. 474 (7351): 337–42. doi:10.1038/nature10163. PMC 3572410
. PMID 21677750. - ↑ Dolgin E (Jun 2011). "Mouse library set to be knockout". Nature. 474 (7351): 262–3. doi:10.1038/474262a. PMID 21677718.
- ↑ Collins FS, Rossant J, Wurst W (Jan 2007). "A mouse for all reasons". Cell. 128 (1): 9–13. doi:10.1016/j.cell.2006.12.018. PMID 17218247.
- ↑ van der Weyden L, White JK, Adams DJ, Logan DW (2011). "The mouse genetics toolkit: revealing function and mechanism". Genome Biology. 12 (6): 224. doi:10.1186/gb-2011-12-6-224. PMC 3218837. PMID 21722353.
Further reading
- Aho H, Schwemmer M, Tessman D, Murphy D, Mattei G, Engel W, Adham IM (Mar 1996). "Isolation, expression, and chromosomal localization of the human mitochondrial capsule selenoprotein gene (MCSP)". Genomics. 32 (2): 184–90. doi:10.1006/geno.1996.0104. PMID 8833144.
- Moghadaszadeh B, Desguerre I, Topaloglu H, Muntoni F, Pavek S, Sewry C, Mayer M, Fardeau M, Tomé FM, Guicheney P (Jun 1998). "Identification of a new locus for a peculiar form of congenital muscular dystrophy with early rigidity of the spine, on chromosome 1p35-36". American Journal of Human Genetics. 62 (6): 1439–45. doi:10.1086/301882. PMC 1377161. PMID 9585610.
- Moghadaszadeh B, Petit N, Jaillard C, Brockington M, Quijano Roy S, Merlini L, Romero N, Estournet B, Desguerre I, Chaigne D, Muntoni F, Topaloglu H, Guicheney P (Sep 2001). "Mutations in SEPN1 cause congenital muscular dystrophy with spinal rigidity and restrictive respiratory syndrome". Nature Genetics. 29 (1): 17–8. doi:10.1038/ng713. PMID 11528383.
- Ferreiro A, Quijano-Roy S, Pichereau C, Moghadaszadeh B, Goemans N, Bönnemann C, Jungbluth H, Straub V, Villanova M, Leroy JP, Romero NB, Martin JJ, Muntoni F, Voit T, Estournet B, Richard P, Fardeau M, Guicheney P (Oct 2002). "Mutations of the selenoprotein N gene, which is implicated in rigid spine muscular dystrophy, cause the classical phenotype of multiminicore disease: reassessing the nosology of early-onset myopathies". American Journal of Human Genetics. 71 (4): 739–49. doi:10.1086/342719. PMC 378532. PMID 12192640.
- Petit N, Lescure A, Rederstorff M, Krol A, Moghadaszadeh B, Wewer UM, Guicheney P (May 2003). "Selenoprotein N: an endoplasmic reticulum glycoprotein with an early developmental expression pattern". Human Molecular Genetics. 12 (9): 1045–53. doi:10.1093/hmg/ddg115. PMID 12700173.
- Ferreiro A, Ceuterick-de Groote C, Marks JJ, Goemans N, Schreiber G, Hanefeld F, Fardeau M, Martin JJ, Goebel HH, Richard P, Guicheney P, Bönnemann CG (May 2004). "Desmin-related myopathy with Mallory body-like inclusions is caused by mutations of the selenoprotein N gene". Annals of Neurology. 55 (5): 676–86. doi:10.1002/ana.20077. PMID 15122708.
- Venance SL, Koopman WJ, Miskie BA, Hegele RA, Hahn AF (Jan 2005). "Rigid spine muscular dystrophy due to SEPN1 mutation presenting as cor pulmonale". Neurology. 64 (2): 395–6. doi:10.1212/01.WNL.0000149755.85666.DB. PMID 15668457.
- Tajsharghi H, Darin N, Tulinius M, Oldfors A (Apr 2005). "Early onset myopathy with a novel mutation in the Selenoprotein N gene (SEPN1)". Neuromuscular Disorders. 15 (4): 299–302. doi:10.1016/j.nmd.2004.11.004. PMID 15792869.
- D'Amico A, Haliloglu G, Richard P, Talim B, Maugenre S, Ferreiro A, Guicheney P, Menditto I, Benedetti S, Bertini E, Bonne G, Topaloglu H (Aug 2005). "Two patients with 'Dropped head syndrome' due to mutations in LMNA or SEPN1 genes". Neuromuscular Disorders. 15 (8): 521–4. doi:10.1016/j.nmd.2005.03.006. PMID 15961312.
- Clarke NF, Kidson W, Quijano-Roy S, Estournet B, Ferreiro A, Guicheney P, Manson JI, Kornberg AJ, Shield LK, North KN (Mar 2006). "SEPN1: associated with congenital fiber-type disproportion and insulin resistance". Annals of Neurology. 59 (3): 546–52. doi:10.1002/ana.20761. PMID 16365872.
- Allamand V, Richard P, Lescure A, Ledeuil C, Desjardin D, Petit N, Gartioux C, Ferreiro A, Krol A, Pellegrini N, Urtizberea JA, Guicheney P (Apr 2006). "A single homozygous point mutation in a 3'untranslated region motif of selenoprotein N mRNA causes SEPN1-related myopathy". EMBO Reports. 7 (4): 450–4. doi:10.1038/sj.embor.7400648. PMC 1456920. PMID 16498447.
- Okamoto Y, Takashima H, Higuchi I, Matsuyama W, Suehara M, Nishihira Y, Hashiguchi A, Hirano R, Ng AR, Nakagawa M, Izumo S, Osame M, Arimura K (Jul 2006). "Molecular mechanism of rigid spine with muscular dystrophy type 1 caused by novel mutations of selenoprotein N gene". Neurogenetics. 7 (3): 175–83. doi:10.1007/s10048-006-0046-0. PMID 16779558.
External links
- GeneReviews/NCBI/NIH/UW entry on Congenital Muscular Dystrophy Overview
- GeneReviews/NCBI/NIH/UW entry on Multiminicore Disease
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