Phytic acid biosynthesis pathway

The phytic acid biosynthesis pathway is a sequence of enzymatic reactions in plants that converts myo-inositol, derived from glucose, into phytic acid (inositol hexaphosphate, InsP6/IP6)[2][3][5][6][7]. It comprises two major branches: a lipid-dependent pathway, ubiquitous among eukaryotes, and a lipid-independent pathway predominant in seeds[2][6][7]. Enzymes such as myo-inositol-3-phosphate synthase (MIPS/INO1), inositol monophosphate phosphatase (IMP), and inositol polyphosphate kinases (MIK, IPK1) orchestrate the stepwise phosphorylation and conversion reactions[2][6][7]. Phytic acid is the chief storage form of phosphorus in seeds, where it also sequesters mineral micronutrients (Fe, Zn, Ca). This activity is essential for seed development and germination but limits bioavailability of micronutrients in human and animal diets, making phytic acid an important anti-nutrient[1][5][3]. Manipulating the pathway (e.g., via genetic engineering) is of major interest in agriculture, aiming to improve grain nutrition and crop yields[2][7][3]. Note: The phytic acid biosynthesis pathway is a metabolic route, not a targeted molecule/receptor for drugs. For drug discovery or molecular targeting, specific enzymes in the pathway (e.g. IPK1) should be the focus, not the pathway as a whole[2][7].

Other names

Inositol hexaphosphate biosynthesis pathwayInsP6 biosynthesis pathwayPhytate biosynthesis pathway