578 results found
    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. Biochemistry and Chemical Biology
    2. Cell Biology

    SM proteins Sly1 and Vps33 co-assemble with Sec17 and SNARE complexes to oppose SNARE disassembly by Sec18

    Braden T Lobingier et al.
    Sec1/Munc18 (SM) proteins shield SNARE complexes from NSF/Sec18-mediated disassembly through cooperative binding interactions with SNARE complexes and the universal co-chaperone α-SNAP/Sec17.
    1. Structural Biology and Molecular Biophysics

    Acidic C-terminal domains autoregulate the RNA chaperone Hfq

    Andrew Santiago-Frangos et al.
    Modeling and biophysics show that the unstructured acidic tail of the Sm protein Hfq mimics nucleic acid to auto inhibit its chaperone activity, preventing Hfq from being sequestered by inauthentic substrates and providing insight into the evolution of Hfq's chaperone function among bacterial genera.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Structural basis for the recognition of spliceosomal SmN/B/B’ proteins by the RBM5 OCRE domain in splicing regulation

    André Mourão et al.
    Interactions with Sm proteins can provide a way in which regulatory factors can modulate alternative splice site choices.
    1. Cell Biology
    2. Structural Biology and Molecular Biophysics

    Munc18-1 catalyzes neuronal SNARE assembly by templating SNARE association

    Junyi Jiao et al.
    Sec1/Munc18-family proteins chaperone SNARE assembly via a common templating mechanism.
    1. Computational and Systems Biology

    A computational interactome and functional annotation for the human proteome

    José Ignacio Garzón et al.
    A machine-learning approach is used to predict 1.35 million interactions for 85% of the human proteome.
    1. Biochemistry and Chemical Biology

    Single molecule poly(A) tail-seq shows LARP4 opposes deadenylation throughout mRNA lifespan with most impact on short tails

    Sandy Mattijssen et al.
    LARP4 protects mRNAs against deadenylation over a wide range of poly(A) lengths but with most apparent functional impact on short lengths known to sensitize PABP binding and mRNA stability.
    1. Cell Biology

    Sphingomyelin metabolism controls the shape and function of the Golgi cisternae

    Felix Campelo et al.
    Association of curvature generating proteins to the Golgi membranes by sphingomyelin metabolism essentially controls the flatness of a Golgi cisterna that is necessary for efficient sorting and export.
    1. Cancer Biology

    Human DECR1 is an androgen-repressed survival factor that regulates PUFA oxidation to protect prostate tumor cells from ferroptosis

    Zeyad D Nassar et al.
    DECR1, a rate-limiting enzyme for polyunsaturated fatty acid (PUFA) β-oxidation, is an androgen-repressed gene in prostate cancer cells that limits oxidative stress to promote cancer cell survival.
    1. Biochemistry and Chemical Biology

    HOPS recognizes each SNARE, assembling ternary trans-complexes for rapid fusion upon engagement with the 4th SNARE

    Hongki Song et al.
    The tethering complex HOPS employs affinity for each of the 4 SNAREs to catalyze assembly of 3-SNARE intermediates, supporting an immediate burst of membrane fusion triggered by the 4th SNARE.

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