NIPA1

Non imprinted in Prader-Willi/Angelman syndrome 1
Identifiers
Symbols	NIPA1 ; FSP3; SPG6
External IDs	OMIM: 608145 MGI: 2442058 HomoloGene: 42327 GeneCards: NIPA1 Gene
Gene ontology Molecular function • magnesium ion transmembrane transporter activity Cellular component • early endosome • plasma membrane • integral component of membrane Biological process • magnesium ion transport • transmembrane transport Sources: Amigo / QuickGO
RNA expression pattern
More reference expression data
Orthologs
Species	Human	Mouse
Entrez	123606	233280
Ensembl	ENSG00000170113	ENSMUSG00000047037
UniProt	Q7RTP0	Q8BHK1
RefSeq (mRNA)	NM_001142275	NM_153578
RefSeq (protein)	NP_001135747	NP_705806
Location (UCSC)	Chr 15: 22.77 – 22.83 Mb	Chr 7: 55.98 – 56.02 Mb
PubMed search

Non-imprinted in Prader-Willi/Angelman syndrome region protein 1 is a protein that in humans is encoded by the NIPA1 gene.^[1][2] This gene encodes a potential transmembrane protein which functions either as a receptor or transporter molecule, possibly as a magnesium transporter.^[3] This protein is thought to play a role in nervous system development and maintenance. Alternative splice variants have been described, but their biological nature has not been determined. Mutations in this gene have been associated with the human genetic disease autosomal dominant spastic paraplegia 6.^[4][5]

Model organisms

Nipa1 knockout mouse phenotype

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	Normal
Body temperature	Normal
Eye morphology	Normal
Clinical chemistry	Normal
Plasma immunoglobulins	Normal
Haematology	Normal
Micronucleus test	Normal
Heart weight	Normal
Skin Histopathology	Normal
Brain 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 NIPA1 function. A conditional knockout mouse line, called Nipa1^{tm1a(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 — at the Wellcome Trust Sanger Institute.^[12][13][14]

Male and female animals underwent a standardized phenotypic screen to determine the effects of deletion.^[8][15] Twenty four tests were carried out on mutant mice but no significant abnormalities were observed.^[8]

References

1. Rainier S, Chai JH, Tokarz D, Nicholls RD, Fink JK (Sep 2003). "NIPA1 gene mutations cause autosomal dominant hereditary spastic paraplegia (SPG6)". Am J Hum Genet 73 (4): 967–71. doi:10.1086/378817. PMC 1180617. PMID 14508710.
2. "Entrez Gene: NIPA1 non imprinted in Prader-Willi/Angelman syndrome 1".
3. Goytain A, Hines RM, El-Husseini A, Quamme GA (2007). "NIPA1(SPG6), the basis for autosomal dominant form of hereditary spastic paraplegia, encodes a functional Mg2+ transporter.". J. Biol. Chem. 282 (11): 8060–8. doi:10.1074/jbc.M610314200. PMID 17166836.
4. Reed JA, Wilkinson PA, Patel H, et al. (2005). "A novel NIPA1 mutation associated with a pure form of autosomal dominant hereditary spastic paraplegia.". Neurogenetics 6 (2): 79–84. doi:10.1007/s10048-004-0209-9. PMID 15711826.
5. Rainier S, Chai JH, Tokarz D, et al. (2003). "NIPA1 gene mutations cause autosomal dominant hereditary spastic paraplegia (SPG6).". Am. J. Hum. Genet. 73 (4): 967–71. doi:10.1086/378817. PMC 1180617. PMID 14508710.
6. "Salmonella infection data for Nipa1". Wellcome Trust Sanger Institute.
7. "Citrobacter infection data for Nipa1". Wellcome Trust Sanger Institute.
8. Gerdin AK (2010). "The Sanger Mouse Genetics Programme: High throughput characterisation of knockout mice". Acta Ophthalmologica 88 (S248). doi:10.1111/j.1755-3768.2010.4142.x.
9. Mouse Resources Portal, Wellcome Trust Sanger Institute.
10. "International Knockout Mouse Consortium".
11. "Mouse Genome Informatics".
12. Skarnes, W. C.; Rosen, B.; West, A. P.; Koutsourakis, M.; Bushell, W.; Iyer, V.; Mujica, A. O.; Thomas, M.; Harrow, J.; Cox, T.; Jackson, D.; Severin, J.; Biggs, P.; Fu, J.; Nefedov, M.; De Jong, P. J.; Stewart, A. F.; Bradley, A. (2011). "A conditional knockout resource for the genome-wide study of mouse gene function". Nature 474 (7351): 337–342. doi:10.1038/nature10163. PMC 3572410. PMID 21677750.
13. Dolgin E (June 2011). "Mouse library set to be knockout". Nature 474 (7351): 262–3. doi:10.1038/474262a. PMID 21677718.
14. Collins FS, Rossant J, Wurst W (January 2007). "A mouse for all reasons". Cell 128 (1): 9–13. doi:10.1016/j.cell.2006.12.018. PMID 17218247.
15. van der Weyden L, White JK, Adams DJ, Logan DW (2011). "The mouse genetics toolkit: revealing function and mechanism.". Genome Biol 12 (6): 224. doi:10.1186/gb-2011-12-6-224. PMC 3218837. PMID 21722353.

Further reading

• Bittel DC, Kibiryeva N, Butler MG (2006). "Expression of 4 genes between chromosome 15 breakpoints 1 and 2 and behavioral outcomes in Prader-Willi syndrome.". Pediatrics 118 (4): e1276–83. doi:10.1542/peds.2006-0424. PMID 16982806.
• Liu T, Qian WJ, Gritsenko MA, et al. (2006). "Human plasma N-glycoproteome analysis by immunoaffinity subtraction, hydrazide chemistry, and mass spectrometry.". J. Proteome Res. 4 (6): 2070–80. doi:10.1021/pr0502065. PMC 1850943. PMID 16335952.
• Munhoz RP, Kawarai T, Teive HA, et al. (2006). "Clinical and genetic study of a Brazilian family with spastic paraplegia (SPG6 locus).". Mov. Disord. 21 (2): 279–81. doi:10.1002/mds.20775. PMID 16267846.
• Chen S, Song C, Guo H, et al. (2006). "Distinct novel mutations affecting the same base in the NIPA1 gene cause autosomal dominant hereditary spastic paraplegia in two Chinese families.". Hum. Mutat. 25 (2): 135–41. doi:10.1002/humu.20126. PMID 15643603.
• Chai JH, Locke DP, Greally JM, et al. (2003). "Identification of four highly conserved genes between breakpoint hotspots BP1 and BP2 of the Prader-Willi/Angelman syndromes deletion region that have undergone evolutionary transposition mediated by flanking duplicons.". Am. J. Hum. Genet. 73 (4): 898–925. doi:10.1086/378816. PMC 1180611. PMID 14508708.
• Toyoda N, Nagai S, Terashima Y, et al. (2003). "Analysis of mRNA with microsomal fractionation using a SAGE-based DNA microarray system facilitates identification of the genes encoding secretory proteins.". Genome Res. 13 (7): 1728–36. doi:10.1101/gr.709603. PMC 403746. PMID 12805275.
• Strausberg RL, Feingold EA, Grouse LH, et al. (2003). "Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences.". Proc. Natl. Acad. Sci. U.S.A. 99 (26): 16899–903. doi:10.1073/pnas.242603899. PMC 139241. PMID 12477932.
• Fink JK, Jones SM, Sharp GB, et al. (1996). "Hereditary spastic paraplegia linked to chromosome 15q: Analysis of candidate genes.". Neurology 46 (3): 835–6. doi:10.1212/wnl.46.3.835. PMID 8618696.
• Fink JK, Wu CT, Jones SM, et al. (1995). "Autosomal dominant familial spastic paraplegia: tight linkage to chromosome 15q.". Am. J. Hum. Genet. 56 (1): 188–92. PMC 1801321. PMID 7825577.