INPP1

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Identifiers
Aliases
External IDs	GeneCards: [1]
Orthologs
Species	Human	Mouse
Entrez	n/a	n/a
Ensembl	n/a	n/a
UniProt	n/a	n/a
RefSeq (mRNA)	n/a	n/a
RefSeq (protein)	n/a	n/a
Location (UCSC)	n/a	n/a
PubMed search	n/a	n/a
Wikidata
View/Edit Human

Inositol polyphosphate 1-phosphatase is an enzyme that, in humans, is encoded by the INPP1 gene. INPP1 encodes the enzyme inositol polyphosphate-1-phosphatase, one of the enzymes involved in phosphatidylinositol signaling pathways. This enzyme removes the phosphate group at position 1 of the inositol ring from the polyphosphates inositol 1,4-bisphosphate and inositol 1,3,4-trisphophosphate.

Model organisms

Inpp1 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
Citrobacter infection	Abnormal
All tests and analysis from

Model organisms have been used in the study of INPP1 function. A conditional knockout mouse line, called Inpp1^{tm1a(KOMP)Wtsi} 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.

Male and female animals underwent a standardized phenotypic screen to determine the effects of deletion. Twenty four tests were carried out on mutant mice, and one significant abnormality was observed: a decreased susceptibility to bacterial infection.

Further reading

• Majerus PW, Ross TS, Cunningham TW, et al. (1990). "Recent insights in phosphatidylinositol signaling". Cell. 63 (3): 459–65. doi:10.1016/0092-8674(90)90442-H. PMID 2225061.
• Zhang X, Majerus PW (1998). "Phosphatidylinositol signalling reactions". Semin. Cell Dev. Biol. 9 (2): 153–60. doi:10.1006/scdb.1997.0220. PMID 9599410.
• Steen VM, Løvlie R, Osher Y, et al. (1998). "The polymorphic inositol polyphosphate 1-phosphatase gene as a candidate for pharmacogenetic prediction of lithium-responsive manic-depressive illness". Pharmacogenetics. 8 (3): 259–68. doi:10.1097/00008571-199806000-00008. PMID 9682271.
• Løvlie R, Gulbrandsen AK, Molven A, Steen VM (2000). "Genomic structure and sequence analysis of a human inositol polyphosphate 1-phosphatase gene (INPP1)". Pharmacogenetics. 9 (4): 517–28. PMID 10780272.
• Patel S, Yenush L, Rodríguez PL, et al. (2002). "Crystal structure of an enzyme displaying both inositol-polyphosphate-1-phosphatase and 3'-phosphoadenosine-5'-phosphate phosphatase activities: a novel target of lithium therapy". J. Mol. Biol. 315 (4): 677–85. doi:10.1006/jmbi.2001.5271. PMID 11812139.
• Piccardi MP, Ardau R, Chillotti C, et al. (2002). "Manic-depressive illness: an association study with the inositol polyphosphate 1-phosphatase and serotonin transporter genes". Psychiatr. Genet. 12 (1): 23–7. doi:10.1097/00041444-200203000-00003. PMID 11901356.
• 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.
• Ota T, Suzuki Y, Nishikawa T, et al. (2004). "Complete sequencing and characterization of 21,243 full-length human cDNAs". Nat. Genet. 36 (1): 40–5. doi:10.1038/ng1285. PMID 14702039.
• Gerhard DS, Wagner L, Feingold EA, et al. (2004). "The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC)". Genome Res. 14 (10B): 2121–7. doi:10.1101/gr.2596504. PMC 528928. PMID 15489334.