29 results found
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    tRNA ligase structure reveals kinetic competition between non-conventional mRNA splicing and mRNA decay

    Jirka Peschek, Peter Walter
    Interconnected RNA processing mechanisms ensure the fidelity of non-conventional mRNA splicing during the unfolded protein response.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Structural basis for the disaggregase activity and regulation of Hsp104

    Alexander Heuck et al.
    Protein disaggregases employ two mechanically-linked ATPase rings that are under steric control by a wrapped-around coiled-coil belt.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Structural insights into the mechanism of the DEAH-box RNA helicase Prp43

    Marcel J Tauchert et al.
    The structural and functional analysis of the ATP-dependent RNA helicase Prp43 provides insights into the mechanisms of RNA binding and translocation, which could serve as paradigm for all DEAH-box proteins.
    1. Structural Biology and Molecular Biophysics

    Crystal structure of the full Swi2/Snf2 remodeler Mot1 in the resting state

    Agata Butryn et al.
    The structure of the entire Mot1 Swi2/Snf2 protein uncovers an unexpected auto-inhibited resting state activated by substrate binding, and suggests a DNA pulling mechanism of TBP displacement.
    1. Biochemistry and Chemical Biology

    Conserved RNA-binding specificity of polycomb repressive complex 2 is achieved by dispersed amino acid patches in EZH2

    Yicheng Long et al.
    Biochemical and mutagenesis analysis reveal the long-anticipated RNA-binding elements of Polycomb Repressive Complex 2 (PRC2), an important chromatin modifier, allowing construction of separation-of-function mutants of PRC2 defective in RNA binding but retaining histone-modifying activity.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    The autophagic membrane tether ATG2A transfers lipids between membranes

    Shintaro Maeda et al.
    The autophagy protein ATG2A tethers membranes and transfers lipids between them, suggesting that autophagosome membranes grow upon the acquisition of lipids from the ER through the ATG2A bridge.
    1. Genetics and Genomics

    Codon optimization underpins generalist parasitism in fungi

    Thomas Badet et al.
    Codon optimization through biased synonymous substitutions is a characteristic feature of the genomes of generalist fungal parasites and is associated with the colonization of multiple hosts.
    1. Cell Biology
    2. Structural Biology and Molecular Biophysics

    The Sec1/Munc18 protein Vps45 holds the Qa-SNARE Tlg2 in an open conformation

    Travis J Eisemann et al.
    Whereas in a paradigmatic structure an SM protein chaperone clamps its client SNARE shut, a second structure demonstrates that an SM protein can also hold its SNARE open to promote assembly.
    1. Structural Biology and Molecular Biophysics

    Molecular architecture of the 90S small subunit pre-ribosome

    Qi Sun et al.
    The nearly complete architecture of the gigantic 90S precursor of small ribosomal subunit is determined by cryo-EM.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Molecular mechanism of thermosensory function of human heat shock transcription factor Hsf1

    Nikolai Hentze et al.
    Heat-induced local unfolding allows Hsf1 to form trimers and bind to DNA, which depends on Hsf1 concentration and is promoted, not inhibited, by Hsp90.

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