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

    The Cas4-Cas1-Cas2 complex mediates precise prespacer processing during CRISPR adaptation

    Hayun Lee et al.
    During CRISPR adaptation, Cas4 forms a ternary complex with the Cas1-Cas2 spacer integration complex, an interaction that coordinates substrate hand-off following precise, PAM-dependent prespacer processing prior to integration.
    1. Biochemistry and Chemical Biology

    Tetramerisation of the CRISPR ring nuclease Crn3/Csx3 facilitates cyclic oligoadenylate cleavage

    Januka S Athukoralage et al.
    A widespread ribonuclease is a CRISPR-associated ring nuclease with a highly unusual cooperative mechanism involving tetramerisation of the enzyme.
    1. Structural Biology and Molecular Biophysics

    Casposase structure and the mechanistic link between DNA transposition and spacer acquisition by CRISPR-Cas

    Alison B Hickman et al.
    The tetrameric structure of a casposase bound to DNA and its biochemical properties show how a transposase could have evolved to perform CRISPR-Cas spacer acquisition.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Role of D-aminoacyl-tRNA deacylase beyond chiral proofreading as a cellular defense against glycine mischarging by AlaRS

    Komal Ishwar Pawar et al.
    Along with preventing D-amino acids from being incorporated into proteins, D-aminoacyl-tRNA deacylase clears achiral glycine that is incorrectly attached to tRNAAla.
    1. Structural Biology and Molecular Biophysics

    Limited dishevelled/Axin oligomerization determines efficiency of Wnt/β-catenin signal transduction

    Wei Kan et al.
    In vitro and in cellulo characterization of oligomerization by the cytoplasmic Wnt effector dishevelled and its partner Axin provide new mechanistic principles for Wnt/β-catenin signaling.
    1. Cell Biology
    2. Plant Biology

    Fluorescent sensors reporting the activity of ammonium transceptors in live cells

    Roberto De Michele et al.
    A modified form of Green Fluorescent Protein integrated into an ammonium transporter provides a sensor that can be used to monitor transport activity in vivo.
    1. Ecology
    2. Microbiology and Infectious Disease

    Ecology and evolution of viruses infecting uncultivated SUP05 bacteria as revealed by single-cell- and meta-genomics

    Simon Roux et al.
    Single-cell amplified genome sequencing uncovers virus-host interactions in uncultivated sulfur-oxidizing bacteria with relevance to coupled biogeochemical cycling in marine oxygen minimum zones.
    1. Biochemistry and Chemical Biology

    Stepwise assembly of the human replicative polymerase holoenzyme

    Mark Hedglin et al.
    Fluorescence resonance energy transfer has been used to explore the interactions between DNA polymerases, sliding clamps and clamp loaders as DNA is replicated in human cells.
    1. Chromosomes and Gene Expression

    High-resolution, genome-wide mapping of positive supercoiling in chromosomes

    Monica S Guo et al.
    GapR-seq enables the global mapping of positive supercoiling in bacteria and yeast, revealing positive supercoils downstream of highly expressed genes and, in yeast, associated with centromeres, pericentromeres, telomeres, replication origins, and R-loops.

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