Medical Definition of Phosphoinositide

1. A phosphatidic acid combined with inositol found in biomembranes and a precursor to certain cellular signals. Sometimes referred to as inositide. It is a very important minor phospholipid in eukaryotes, involved in signal transduction processes. Contains myo inositol linked through the 1 hydroxyl group to phosphatidic acid. The 4 phosphate (PIP) and 4, 5 bisphosphate derivatives PIP2) are formed and broken down in membranes by the action of specific kinases and phosphatases (futile cycles). Signal sensitive phospholipase C enzymes remove the inositol moiety, in particular from 1,4,5 trisphosphate (PIP2) as inositol 1,4,5 triphosphate (Ins P3: IP3). Both the diacyl glycerol and products act as second messengers. Synonym: phosphoinositide. (20 Sep 2002)

Lexicographical Neighbors of Phosphoinositide

phosphoglyceracetals
phosphoglycerate
phosphoglycerate dehydrogenase
phosphoglycerate kinase
phosphoglycerate mutase
phosphoglycerate permease
phosphoglyceric acid
phosphoglycerides
phosphoglyceromutase
phosphoheptose isomerase
phosphohexokinase
phosphohexomutase
phosphohexose isomerase
phosphohexose isomerase deficiency
phosphohydrolases
phosphoinositide (current term)
phosphokinase
phosphokinase
phosphokinases
phospholamban kinase
phospholamban phosphatase
phospholipase
phospholipase
phospholipases
phospholipases
phospholipases a
phospholipase A1
phospholipase A2
phospholipase B
phospholipase c

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