13 results found
    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. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    The interplay at the replisome mitigates the impact of oxidative damage on the genetic integrity of hyperthermophilic Archaea

    Tom Killelea et al.
    An investigation into 8-oxodeoxguanosine bypass by archaeal DNA polymerases.
    1. Ecology

    The lost world of Cuatro Ciénegas Basin, a relictual bacterial niche in a desert oasis

    Valeria Souza et al.
    At Cuatro Ciénegas, the ancestral niche conditions of the ancient shores of Laurentia persisted along with its microbial communities that have been coevolving for a very long time.
    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. Structural Biology and Molecular Biophysics

    Structure and in situ organisation of the Pyrococcus furiosus archaellum machinery

    Bertram Daum et al.
    Using both electron cryo-tomography and helical reconstruction, the first structure of the entire archaellum machinery with an assembled filament has been determined, providing the structural basis for our understanding of archaeal motility.
    1. Cell Biology
    2. Chromosomes and Gene Expression

    Modularity and determinants of a (bi-)polarization control system from free-living and obligate intracellular bacteria

    Matthieu Bergé et al.
    Common ancestries, activities and structural determinants of a modular (bi-)polarization control system encoded in free-living and obligate intracellular α-proteobacteria, including the rickettsial pathogens, are described.
    1. Structural Biology and Molecular Biophysics
    2. Cell Biology

    Crenactin forms actin-like double helical filaments regulated by arcadin-2

    Thierry Izoré et al.
    Close evolutionary relationship between eukaryotic F-actin and crenarchaeal crenactin protein is supported by a near-atomic cryoEM structure of double helical filaments, that are inhibited by arcadin-2 through binding to crenactin's hydrophobic groove.
    1. Structural Biology and Molecular Biophysics
    2. Cell Biology

    Cytoskeleton: The mother of all actins?

    Felipe Merino, Stefan Raunser
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    1. Structural Biology and Molecular Biophysics

    α/β coiled coils

    Marcus D Hartmann et al.
    Simple insertions switch α-helical coiled coils into a novel fibrous protein fold that is periodically interspersed with short β-strands.
    1. Structural Biology and Molecular Biophysics
    2. Evolutionary Biology

    Large-scale determination of previously unsolved protein structures using evolutionary information

    Sergey Ovchinnikov et al.
    A new method of protein structure prediction that incorporates residue–residue co-evolution information into the Rosetta structure prediction program was used to develop models for 58 large protein families that had no previous structural information.

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