4,412 results found
    1. Chromosomes and Gene Expression

    Dimerisation of the PICTS complex via LC8/Cut-up drives co-transcriptional transposon silencing in Drosophila

    Evelyn L Eastwood et al.
    Heterochromatin formation at transposon loci depends on dimerisation of the effector complex that elicits co-transcriptional silencing and this requirement is fulfilled by co-option of the conserved dimerisation hub protein, Cut-up/LC8.
    1. Chromosomes and Gene Expression

    Efficient chromatin accessibility mapping in situ by nucleosome-tethered tagmentation

    Steven Henikoff et al.
    A simple modification of CUT&Tag chromatin profiling method provides high-quality chromatin accessibility maps and indicates that 'open' chromatin results from a transcription-coupled process at promoters and enhancers.
    1. Developmental Biology
    2. Structural Biology and Molecular Biophysics

    A crystal structure of a collaborative RNA regulatory complex reveals mechanisms to refine target specificity

    Chen Qiu et al.
    A Caenorhabitis elegans RNA-binding protein, FBF-2, modulates RNA sequence motif recognition through conformational change and partner protein interaction.
    1. Microbiology and Infectious Disease

    Reciprocal virulence and resistance polymorphism in the relationship between Toxoplasma gondii and the house mouse

    Jingtao Lilue et al.
    Mechanisms that enable wild mice to survive infection with strains of the Toxoplasma gondii parasite virulent enough to kill laboratory mice offer an explanation for how these parasites have been able to persist in the mouse population.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Structural and kinetic analysis of the COP9-Signalosome activation and the cullin-RING ubiquitin ligase deneddylation cycle

    Ruzbeh Mosadeghi et al.
    The general principles that underlie the mechanism of action of the COP9-Signalosome, a key regulator of the largest family of ubiquitin ligase enzymes in human cells, have been identified using structural and kinetic techniques.
    1. Biochemistry and Chemical Biology

    The dynamic interplay of host and viral enzymes in type III CRISPR-mediated cyclic nucleotide signalling

    Januka S Athukoralage et al.
    The dynamic interplay between type III CRISPR enzymes governs cyclic nucleotide levels and infection outcomes in virus-host conflict.
    1. Biochemistry and Chemical Biology

    Control of cyclic oligoadenylate synthesis in a type III CRISPR system

    Christophe Rouillon et al.
    Generation of the anti-viral second messenger cyclic oligoadenylate by type III CRISPR systems is tightly controlled in response to viral RNA load and sequence.
    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    In vitro analysis of RQC activities provides insights into the mechanism and function of CAT tailing

    Beatriz A Osuna et al.
    Yeast extracts recapitulate a quality-control pathway dedicated to rescuing stalled ribosomes, providing unexpected insights into a noncanonical elongation reaction and the fate of incompletely synthesized proteins.
    1. Structural Biology and Molecular Biophysics
    2. Evolutionary Biology

    An atomic-resolution view of neofunctionalization in the evolution of apicomplexan lactate dehydrogenases

    Jeffrey I Boucher et al.
    The convergent evolution of unusually strict substrate specificity in apicomplexan LDHs arose by classic neofunctionalization of a duplicated MDH gene via few mutations of large effect.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Crystal structures of DNA polymerase I capture novel intermediates in the DNA synthesis pathway

    Nicholas Chim et al.
    Insight into the mechanism of DNA synthesis is provided by the crystal structures of DNA polymerase intermediates.

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