140 results found
    1. Cell Biology

    In vivo reconstitution finds multivalent RNA–RNA interactions as drivers of mesh-like condensates

    Weirui Ma et al.
    Binding of a multivalent RNA-binding protein to mRNAs that are able to form pervasive RNA–RNA interactions induces formation of mesh-like condensates, whereas binding of mostly structured mRNAs induces sphere-like condensates.
    1. Structural Biology and Molecular Biophysics

    Nucleophosmin integrates within the nucleolus via multi-modal interactions with proteins displaying R-rich linear motifs and rRNA

    Diana M Mitrea et al.
    Nucleolar protein localization involves the phase separation within the nucleolar matrix via three types of multivalent features: acidic tracts, nucleic acid binding domains and arginine-rich low complexity sequences.
    1. Chromosomes and Gene Expression
    2. Structural Biology and Molecular Biophysics

    Structure of the human core transcription-export complex reveals a hub for multivalent interactions

    Thomas Pühringer et al.
    The cryo-EM structure of the human transcription-export THO–UAP56 complex reveals mechanisms of mRNA nuclear export licensing.
    1. Structural Biology and Molecular Biophysics
    2. Cell Biology

    Importin-β modulates the permeability of the nuclear pore complex in a Ran-dependent manner

    Alan R Lowe et al.
    The Ran GTPase plays a role in defining the physical properties of the nuclear pore complex transport channel by remodeling the binding interactions of importin-β with the nucleoporin Nup153 at the nuclear face of the pore.
    1. Structural Biology and Molecular Biophysics
    2. Computational and Systems Biology

    Pi-Pi contacts are an overlooked protein feature relevant to phase separation

    Robert McCoy Vernon et al.
    Statistics on the frequencies of pi interactions in folded protein structures enable successful prediction of intrinsically disordered protein phase separation, with clear implications for a physical understanding of cellular organization.
    1. Chromosomes and Gene Expression
    2. Structural Biology and Molecular Biophysics

    Evidence for DNA-mediated nuclear compartmentalization distinct from phase separation

    David Trombley McSwiggen et al.
    Transient DNA interactions by DNA-binding proteins are utilized by herpes simple virus as an alternative route to generate membraneless compartments in the nucleus without invoking phase separation.
    1. Structural Biology and Molecular Biophysics
    2. Chromosomes and Gene Expression

    PHF13 is a molecular reader and transcriptional co-regulator of H3K4me2/3

    Ho-Ryun Chung et al.
    PHF13 interacts with transcriptional complexes containing RNA polymerase II to recruit/stabilize them at H3K4me2/3 containing active or bivalent promoters.
    1. Structural Biology and Molecular Biophysics
    2. Chromosomes and Gene Expression

    Single-molecule observation of DNA compaction by meiotic protein SYCP3

    Johanna L Syrjänen et al.
    Building on previous work (Syrjänen, Pellegrini, & Davies, 2014), it is shown that SYCP3 contributes to the architecture of meiotic chromosomes through local bridging interactions that result in large-scale compaction of the chromosome axis.
    1. Immunology and Inflammation

    The activation of IgM- or isotype-switched IgG- and IgE-BCR exhibits distinct mechanical force sensitivity and threshold

    Zhengpeng Wan et al.
    The B cell receptors of naïve B cells need higher levels of mechanical force to be fully activated than those of memory B cells.
    1. Cell Biology

    A quantitative inventory of yeast P body proteins reveals principles of composition and specificity

    Wenmin Xing et al.
    Quantitative analyses of yeast P bodies reveals a small number of highly concentrated proteins and many weakly concentrated proteins, suggesting that the compartments are compositionally simpler than previously thought.

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