15 results found
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Regulating G protein-coupled receptors by topological inversion

    Bray Denard et al.
    Multiple biochemical assays show that the topology of CCR5 and possibly other GPCRs may be inverted by ceramide or other sphingolipids through the process of regulated alternative translocation.
    1. Evolutionary Biology
    2. Immunology and Inflammation

    Homology-guided identification of a conserved motif linking the antiviral functions of IFITM3 to its oligomeric state

    Kazi Rahman et al.
    A disease-associated polymorphism in a related protein that regulates neurotransmitter release reveals that antiviral protein IFITM3 forms oligomers to rigidify membranes and inhibit virus fusion with cells.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Role of Tim17 in coupling the import motor to the translocation channel of the mitochondrial presequence translocase

    Keren Demishtein-Zohary et al.
    First two transmembrane segments of Tim17 are involved in interaction with the channel and the second two with the motor of the presequence translocase suggesting how proteins are handed over during their translocation into mitochondria.
    1. Evolutionary Biology

    On the emergence of P-Loop NTPase and Rossmann enzymes from a Beta-Alpha-Beta ancestral fragment

    Liam M Longo et al.
    Analysisof P-loop NTPases and Rossmans, the most ancient and diverse enzyme lineages, suggests their divergence from one ancestral polypeptide.
    1. Structural Biology and Molecular Biophysics

    Activation of a nucleotide-dependent RCK domain requires binding of a cation cofactor to a conserved site

    Celso M Teixeira-Duarte et al.
    Cations are essential cofactors in the ATP activation mechanism of the KtrAB cation channel and appear to be cofactors of many other nucleotide-dependent RCK domains.
    1. Structural Biology and Molecular Biophysics

    Structural basis of substrate recognition by a polypeptide processing and secretion transporter

    Virapat Kieuvongngam et al.
    Cryo-EM structure of a peptidase-containing ABC transporter in complex with its protein substrate reveals a mechanism of coupling substrate cleavage to translocation.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Cryo-EM structure of a late pre-40S ribosomal subunit from Saccharomyces cerevisiae

    André Heuer et al.
    Near atomic resolution of late 40S ribosomal subunit assembly by cryo-EM reveals immature rRNA active sites stabilized by biogenesis factors.
    1. Biochemistry and Chemical Biology

    Independent evolution of functionally exchangeable mitochondrial outer membrane import complexes

    Daniela G Vitali et al.
    The convergent evolution of yeast Mim1/2 and trypanosomal pATOM36 enable the first demonstration of reciprocal functional rescue of two evolutionary unrelated mitochondrial biogenesis complexes belonging to two different eukaryotic supergroups.
    1. Structural Biology and Molecular Biophysics

    Mutational scanning reveals the determinants of protein insertion and association energetics in the plasma membrane

    Assaf Elazar et al.
    Deep sequencing analysis quantifies the hydrophobicity of the plasma membrane and provides restraints for structure modeling of receptor homodimers to atomic precision.
    1. Microbiology and Infectious Disease

    Structural basis for effector transmembrane domain recognition by type VI secretion system chaperones

    Shehryar Ahmad et al.
    A widespread family of chaperones functions to stabilize membrane protein effectors by mimicking transmembrane helical environments and promotes effector export by the bacterial type VI secretion system.

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