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Page 2 of 136
    1. Cell Biology
    2. Immunology and Inflammation

    Non-canonical antagonism of PI3K by the kinase Itpkb delays thymocyte β-selection and renders it Notch-dependent

    Luise Westernberg et al.
    Antagonistic signaling by the kinases PI3K and Itpkb limits the kinetics and enforces the Notch-dependence of beta-selection – the most important cell-fate determining process in alpha beta T cell development.
    1. Cancer Biology

    Synergistic interactions with PI3K inhibition that induce apoptosis

    Yaara Zwang et al.
    A geneome-scale shRNA screen identifies five genes whose suppression promotes cell death upon PI3K inhibition both in vitro and in vivo, thus suggesting potential combination therapies involving PI3K inhibition.
    1. Cancer Biology
    2. Cell Biology

    Rac1-mediated membrane raft localization of PI3K/p110β is required for its activation by GPCRs or PTEN loss

    Onur Cizmecioglu et al.
    A unique two-step mechanism of plasma membrane recruitment and activation governs G-protein-coupled receptor mediated PI3K signaling.
    1. Developmental Biology

    Fetal and trophoblast PI3K p110α have distinct roles in regulating resource supply to the growing fetus in mice

    Jorge López-Tello et al.
    Fetus and trophoblast interplay to regulate fetal nutrient supply and, ultimately, affect healthy growth.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Ankyrin-B is a PI3P effector that promotes polarized α5β1-integrin recycling via recruiting RabGAP1L to early endosomes

    Fangfei Qu et al.
    Ankyrin-B – through interactions with PI3P lipids, dynactin and RabGAP1L – functions as a critical node in the protein circuitry underlying polarized recycling of α5β1-integrin to enable haptotaxis along fibronectin gradients.
    1. Neuroscience

    A postsynaptic PI3K-cII dependent signaling controller for presynaptic homeostatic plasticity

    Anna G Hauswirth et al.
    A screen encompassing all kinases and phosphatases reveals that PI3K-cII, PI3K-cIII and Rab11-dependent recycling endosomes comprise a novel, postsynaptic 'signaling controller' that is part of an integrated, trans-synaptic signaling system necessary for presynaptic homeostatic plasticity.
    1. Neuroscience

    Mouse models of human PIK3CA-related brain overgrowth have acutely treatable epilepsy

    Achira Roy et al.
    Acute one-hour treatment of Pik3ca mutant mice with a novel anti-epilepsy drug suppresses seizures despite continued developmental brain dysmorphology, promising a new therapeutic strategy for patients with intractable pediatric epilepsy.
    1. Structural Biology and Molecular Biophysics

    Structure of substrate-bound SMG1-8-9 kinase complex reveals molecular basis for phosphorylation specificity

    Lukas M Langer et al.
    First structural view of a substrate-bound PIKK (PI3K-related-kinase) by cryo-EM explains phosphorylation specificity toward a short amino-acid motif shared across the PIKK family and rationalizes PIKK auto-inhibition by regulatory domain.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Lysosomal cholesterol export reconstituted from fragments of Niemann-Pick C1

    Michael Nguyen Trinh et al.
    The N-terminal domain of one NPC1 molecule can transfer its cholesterol to another NPC1 molecule lacking the N-terminal domain, suggesting that NPC1 forms multimers that transport cholesterol out of lysosomes.
    1. Developmental Biology

    FGF mediated MAPK and PI3K/Akt Signals make distinct contributions to pluripotency and the establishment of Neural Crest

    Lauren Geary, Carole LaBonne
    A role for FGF-mediated Map Kinase signaling in the retention of pluripotency underlying genesis of Neural Crest is revealed, along with a striking switch in the signaling cascades activated by FGF signaling as cells commence lineage restriction.