138 results found
    1. Structural Biology and Molecular Biophysics

    Structural insights into human acid-sensing ion channel 1a inhibition by snake toxin mambalgin1

    Demeng Sun et al.
    Mambalgin1 binds to the thumb domain of human ASIC1a channel and inhibits the channel through hindering the proton-induced transitions from the resting closed state to the active and/or desensitized state.
    1. Evolutionary Biology

    The skin microbiome facilitates adaptive tetrodotoxin production in poisonous newts

    Patric M Vaelli et al.
    Skin-associated bacteria underlie the production of a potent defensive neurotoxin in newts, impacting host physiology, molecular evolution, and predator-prey interactions in a coevolutionary arms race.
    1. Neuroscience

    RIM is essential for stimulated but not spontaneous somatodendritic dopamine release in the midbrain

    Brooks G Robinson et al.
    Midbrain dopamine neurons use sophisticated secretory machinery to establish specialized sites for action potential-evoked release of dopamine from their cell bodies and dendrites.
    1. Ecology
    2. Evolutionary Biology

    Dynamics of venom composition across a complex life cycle

    Yaara Y Columbus-Shenkar et al.
    Different developmental stages of a venomous animal (e.g. Nematostella vectensis) with a complex life cycle produce vastly different venoms that can serve in different antagonistic interactions with other species.
    1. Neuroscience

    A valve-like mechanism controls desensitization of functional mammalian isoforms of acid-sensing ion channels

    Yangyu Wu et al.
    Three residues work together as a valve-like mechanism to control desensitization from pre-open and open states in the ion channels ASIC1a, ASIC2a, and ASIC3.
    1. Structural Biology and Molecular Biophysics
    2. Neuroscience

    Structure of a pore-blocking toxin in complex with a eukaryotic voltage-dependent K+ channel

    Anirban Banerjee et al.
    Charybdotoxin, a toxin produced by scorpions, blocks a K+ channel by binding in a lock-and-key fashion to the mouth of the channel and presenting a lysine amino group, which serves as a K+ mimic in the selectivity filter.
    1. Structural Biology and Molecular Biophysics

    Structure and analysis of nanobody binding to the human ASIC1a ion channel

    Yangyu Wu et al.
    Development of specific and high-affinity nanobodies to probe the structure of human acid sensing ion channel-1a and as binding modifiers of the toxins PcTx and MitTx1.
    1. Cell Biology
    2. Immunology and Inflammation

    Anti-ferroptotic mechanism of IL4i1-mediated amino acid metabolism

    Leonie Zeitler et al.
    IL4i1 is an amino acid oxidase expressed in the mammalian immune system and snake venoms, which control diametrically opposite cell protection versus cell death pathways, respectively.
    1. Neuroscience

    Diverse modes of synaptic signaling, regulation, and plasticity distinguish two classes of C. elegans glutamatergic neurons

    Donovan Ventimiglia, Cornelia I Bargmann
    Single-neuron synaptic imaging in vivo demonstrates that highly conserved molecules such as UNC-13, UNC-18, and protein kinase C, which are found at essentially every synapse make different functional contributions in Caenorhabditis elegans glutamatergic neurons.
    1. Microbiology and Infectious Disease

    Factors essential for L,D-transpeptidase-mediated peptidoglycan cross-linking and β-lactam resistance in Escherichia coli

    Jean-Emmanuel Hugonnet et al.
    Production of the L,D-transpeptidase YcbB and elevated synthesis of the (p)ppGpp alarmone reveals a new mode of peptidoglycan polymerization that bypasses the D,D-transpeptidase activity of PBPs and leads to broad-spectrum β-lactam resistance in Escherichia coli.

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