759 results found
    1. Structural Biology and Molecular Biophysics

    Protein Unfolding: Same structure, different mechanisms?

    Francis TF Tsai, Christopher P Hill
    Two interpretations of similar structures for the same molecular machine illustrate the limits of inferring biochemical mechanism from protein structure.
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    1. Structural Biology and Molecular Biophysics

    A processive rotary mechanism couples substrate unfolding and proteolysis in the ClpXP degradation machinery

    Zev A Ripstein et al.
    Understanding of bacterial protein degradation is illuminated by cryo-EM structures of the substrate-bound ClpXP complex from Neisseria meningitidis at 2.3 to 3.3 Å resolution.
    1. Structural Biology and Molecular Biophysics

    Structures of the ATP-fueled ClpXP proteolytic machine bound to protein substrate

    Xue Fei et al.
    Cryo-EM structures of the ClpXP protease reveal how protein substrates are bound, show how spiral ClpX hexamers bind symmetry-mismatched heptameric ClpP rings, and suggest mechanisms for processive substrate translocation.
    1. Biochemistry and Chemical Biology

    Specific lid-base contacts in the 26s proteasome control the conformational switching required for substrate degradation

    Eric R Greene et al.
    The 26S proteasome lid subcomplex acts as an external scaffold whose interactions with the ATPase motor stabilize the substrate-engagement-competent state, and control conformational changes upon engagement for subsequent degradation steps.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Guanidine hydrochloride reactivates an ancient septin hetero-oligomer assembly pathway in budding yeast

    Courtney R Johnson et al.
    A naturally-occurring small molecule acts as a chemical chaperone in vivo to alter the folding of a budding yeast septin and promote an oligomerization pathway that was lost during evolution.
    1. Structural Biology and Molecular Biophysics

    Cryo-EM structures of S-OPA1 reveal its interactions with membrane and changes upon nucleotide binding

    Danyang Zhang et al.
    GTP binding induces rearrangement of S-OPA1 assembly on membrane and thus triggers membrane remodeling with reduced curvature.
    1. Neuroscience

    Kainate receptors regulate development of glutamatergic synaptic circuitry in the rodent amygdala

    Maria Ryazantseva et al.
    Glutamatergic projections from basolateral to central amygdala, implicated in neuropsychiatric disorders, develop rapidly during early postnatal period and their development is modulated via endogenously active kainate receptors.
    1. Chromosomes and Gene Expression

    The genetic basis of aneuploidy tolerance in wild yeast

    James Hose et al.
    A single gene allele underlies differences in aneuploidy tolerance in yeast.
    1. Neuroscience

    Stxbp1/Munc18-1 haploinsufficiency impairs inhibition and mediates key neurological features of STXBP1 encephalopathy

    Wu Chen et al.
    Two genetically distinct Stxbp1 haploinsufficiency mouse models exhibit seizures and impairments in cognitive, psychiatric, and motor functions, representing robust preclinical models of STXBP1 encephalopathy with both construct and face validity.

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