A comprehensive analysis of the phosphoinositide interactome has been performed using analogues of PI(3,5)P2 and PI(4,5)P2 phosphatidyl phospholipids which were immobilized onto Affi-10 beads or incorporated into liposomes for use as affinity absorbents with cytosolic extracts from colonic carcinoma cell lines. Affinity/LC/MS/MS experiments allowed identification of 388 proteins/protein complexes that appeared to interact specifically with the phosphoinositide targets: a number of novel potential phosphoinositide interacting proteins have been identified.
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| http://dx.doi.org/10.1021/pr800540h | DOI Listing |
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Activation of Src and release of intracellular calcium by phosphatidic acid during Xenopus laevis fertilization.
Dev Biol
February 2014
University of Colorado Denver, Denver, CO 80217-3364, USA. Electronic address:
We report a new step in the fertilization in Xenopus laevis which has been found to involve activation of Src tyrosine kinase to stimulate phospholipase C-γ (PLC-γ) which increases inositol 1,4,5-trisphosphate (IP3) to release intracellular calcium ([Ca](i)). Molecular species analysis and mass measurements suggested that sperm activate phospholipase D (PLD) to elevate phosphatidic acid (PA). We now report that PA mass increased 2.
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