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Pathway Description
Inositol Phosphate Metabolism
Homo sapiens
Category:
Metabolite Pathway
Sub-Category:
Metabolic
Created: 2013-08-19
Last Updated: 2023-10-25
Inositol phosphates are a group of molecules that are important for a number of cellular functions, such as cell growth, apoptosis, cell migration, endocytosis, and cell differentiation. Inositol phsosphates consist of an inositol (a sixfold alcohol of cyclohexane) phosphorylated at one or more positions. There are a number of different inositol phosphates found in mammals, distinguishable by the number and position of the phosphate groups. Inositol phosphate can be formed either as a product of phosphatidylinositol phosphate metabolism or from glucose 6-phosphate via the enzyme inositol-3-phosphate synthase 1. Conversion between the different types of inositol phosphates then occurs via a number of specific inositol phosphate kinases and phosphatases, which add (kinase) or remove (phosphatase) phosphate groups. The differing roles of the numerous inositol phosphates means that their metabolism must be tightly regulated. This is done via the localization and activation/deactivation of the various kinases and phosphatases, which can be found in the cytoplasm, nucleus or endoplasmic reticulum. The unphosphorylated inositol ring can be used to produce phosphoinositides through phosphatidylinositol phosphate metabolism.
References
Inositol Phosphate Metabolism References
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Pubmed: 12084730
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Pubmed: 9923613
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Pubmed: 10087200
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Pubmed: 22308441
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Pubmed: 30420721
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Pubmed: 12027805
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Pubmed: 12223481
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