3,615 results found
    1. Cell Biology
    2. Neuroscience

    The orphan receptor GPR88 blunts the signaling of opioid receptors and multiple striatal GPCRs

    Thibaut Laboute et al.
    GPR88 inhibits G-protein signaling of nearby GPCRs, and dampens b-arrestin recruitment by all GPCRs tested, likely by sequestration in intracellular compartments.
    1. Cell Biology
    2. Developmental Biology

    The cAMP effector PKA mediates Moody GPCR signaling in Drosophila blood–brain barrier formation and maturation

    Xiaoling Li et al.
    A polarized Moody/protein kinase A pathway plays an unrecognized central role in controlling the enormous cell growth and blood–brain barrier integrity in a highly coordinated spatiotemporal manner in brain homeostasis.
    1. Cell Biology
    2. Neuroscience

    Latrophilin GPCR signaling mediates synapse formation

    Richard Sando, Thomas C Südhof
    Spatial restriction of GPCR signaling at nascent synapses by adhesion complexes drives excitatory synapse formation and specificity in the hippocampus.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Complementary biosensors reveal different G-protein signaling modes triggered by GPCRs and non-receptor activators

    Mikel Garcia-Marcos
    Heterotrimeric G-proteins can be switched on not only by G-protein-coupled receptors but also by cytoplasmic proteins, resulting in different signaling mechanisms in cells depending on the specific type of activator.
    1. Cancer Biology
    2. Cell Biology

    GPCR signaling inhibits mTORC1 via PKA phosphorylation of Raptor

    Jenna L Jewell et al.
    Protein kinase A (PKA) phosphorylates Raptor and inhibits mammalian target of rapamycin complex 1 (mTORC1) activity.
    1. Cell Biology

    G protein-regulated endocytic trafficking of adenylyl cyclase type 9

    André M Lazar et al.
    An adenylyl cyclase isoform is shown to dynamically traffic to endosomes after activation by G protein in mammalian cells, contributing to cellular cAMP signaling by internalized GPCRs.
    1. Cell Biology

    Conformational specificity of opioid receptors is determined by subcellular location irrespective of agonist

    Stephanie E Crilly et al.
    A GPCR activated by the same agonist engages different conformational biosensors at different subcellular locations, suggesting that location-based conformations drive spatial encoding of signaling.
    1. Cell Biology

    Compartment-specific opioid receptor signaling is selectively modulated by different dynorphin peptides

    Jennifer M Kunselman et al.
    Different dynorphins, which signal similarly from the cell surface, can differentially localize G protein-coupled receptors to specific subcellular compartments and cause divergent receptor fates and distinct spatiotemporal patterns of signaling.
    1. Structural Biology and Molecular Biophysics

    Molecular basis of signaling specificity between GIRK channels and GPCRs

    Kouki K Touhara, Roderick MacKinnon
    A single kinetic step in the G protein activation cycle determines whether a G protein-coupled receptor activates G protein-gated K+ channels or not.
    1. Cell Biology

    Phosphorylation of β-arrestin2 at Thr383 by MEK underlies β-arrestin-dependent activation of Erk1/2 by GPCRs

    Elisabeth Cassier et al.
    Phosphoproteomics identifies β-arrestin 2 phosphorylation at Thr383 by MEK as a key step of GPCR-induced Erk½ activation, thus providing new insight into the molecular mechanism underlying β-arrestin-dependent GPCR-operated signaling.

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