Precursor of inositol 1,3,4-trisphosphate; increases entry of calcium across the plasma membrane; proposed regulator of intracellular calcium by control of plasma membrane transport of calcium ions.
The membrane lipid phosphatidylinositol-3,4,5-trisphosphate (PtdInsP(3)) regulates membrane receptor signalling in many cells, including immunoreceptor signalling. Here, we review recent data that have indicated essential roles for the soluble PtdInsP(3) analogue inositol-1,3,4,5-tetrakisphosphate (InsP(4)) in T cell, B cell and neutrophil development
Many neutrophil functions are mediated by PtdIns(3,4,5)P3 that exerts its role by mediating protein translocation via binding to their PH-domains. Inositol 1,3,4,5-tetrakisphosphate (Ins(1,3,4,5)P4) binds the same PH domain, competes for its binding to PtdIns(3,4,5)P3, and thus negatively regulates PtdIns(3,4,5)P3 signaling.
An in vivo fluorescent sensor reveals intracellular ins(1,3,4,5)P4 dynamics in single cells.
Reiko Sakaguchi et al.
Angewandte Chemie (International ed. in English), 49(12), 2150-2153 (2009-11-10)
A bifunctional molecule containing biotin and d-myo-inositol 1,3,4,5-tetrakisphosphate was synthesized. This molecule was designed on the basis of X-ray structure of the complex of d-myo-inositol 1,3,4,5-tetrakisphosphates, Ins(1,3,4,5)P(4), and Grp1 PH (general receptor of phosphoinositides pleckstrin homology) domain for the application
A fluorescent sensor for the detection of inositol-1,3,4,5-tetrakisphosphate, Ins(1,3,4,5)P(4), was constructed from a split PH domain and a single circularly permuted GFP. A structure-based design was conducted to transduce a ligand-induced subtle structural perturbation of the split PH domain to
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