21 results found
    1. Microbiology and Infectious Disease

    SARS-CoV-2 entry into human airway organoids is serine protease-mediated and facilitated by the multibasic cleavage site

    Anna Z Mykytyn et al.
    Whereas SARS-CoV-2 utilizes cathepsins to enter most cell lines, human airway organoids revealed that entry into relevant cells is dependent on serine proteases, which can be targeted for treatment.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Astrin-SKAP complex reconstitution reveals its kinetochore interaction with microtubule-bound Ndc80

    David M Kern et al.
    Biochemical and cell biological analyses reveal that the Astrin-SKAP complex acts to stabilize kinetochore-microtubule interactions through its intrinsic microtubule binding activity and its association with the Ndc80 complex, the core component of the kinetochore-microtubule interface.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    The multi-subunit GID/CTLH E3 ubiquitin ligase promotes cell proliferation and targets the transcription factor Hbp1 for degradation

    Fabienne Lampert et al.
    Proteomic, biochemical and cell-based analyses of the heterodecameric core GID/CTLH E3 ligase complex reveal its molecular architecture, activity determinants, and function in targeting the tumor suppressor Hbp1 and other substrates required for cell proliferation.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Functional instability allows access to DNA in longer transcription Activator-Like effector (TALE) arrays

    Kathryn Geiger-Schuller et al.
    Single molecule DNA-binding trajectories and deterministic modeling analyses demonstrate a functional role for high energy partly folded states in Transcription Activator-Like Effectors that could improve future TALEN design.
    1. Chromosomes and Gene Expression
    2. Structural Biology and Molecular Biophysics

    CtIP forms a tetrameric dumbbell-shaped particle which bridges complex DNA end structures for double-strand break repair

    Oliver J Wilkinson et al.
    Structural and biochemical analysis of human CtIP provides new insights into DNA break recognition, binding and bridging during homologous recombination.
    1. Biochemistry and Chemical Biology

    Transport of DNA within cohesin involves clamping on top of engaged heads by Scc2 and entrapment within the ring by Scc3

    James E Collier et al.
    Rigorous biochemical and structural analyses reveal the precise topology of cohesin's association with DNA and suggest a mechanism for how DNA is transported inside the ring.
    1. Structural Biology and Molecular Biophysics
    2. Chromosomes and Gene Expression

    Structure of the active form of human origin recognition complex and its ATPase motor module

    Ante Tocilj et al.
    The human Origin Replication Complex is shaped as a shallow corkscrew in a classic AAA+ organization reminiscent of clamp loader complexes with highly controlled ATPase activity as exemplified by Meier-Gorlin syndrome mutations.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Insights into the molecular architecture and histone H3-H4 deposition mechanism of yeast Chromatin assembly factor 1

    Paul Victor Sauer et al.
    The CAF1 complex binds single histone H3-H4 dimers, and two such complexes associate with extended DNA elements to ensure the deposition of H3-H4 tetramers, the first step in the assembly of nucleosomes.
    1. Cell Biology
    2. Microbiology and Infectious Disease

    Evidence for a DNA-relay mechanism in ParABS-mediated chromosome segregation

    Hoong Chuin Lim et al.
    In vitro, in vivo and in silico evidence suggests that bacteria exploit intrinsic chromosomal fluctuations to achieve intracellular transport.
    1. Structural Biology and Molecular Biophysics
    2. Cell Biology

    The pseudo GTPase CENP-M drives human kinetochore assembly

    Federica Basilico et al.
    Centromeric protein M (CENP-M) is required for the stabilization of a quaternary complex that plays a crucial role in kinetochore organization and function.

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