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

    The universally-conserved transcription factor RfaH is recruited to a hairpin structure of the non-template DNA strand

    Philipp K Zuber, Irina Artsimovitch ... Stefan H Knauer
    Transcription factors can read out both the sequence and the structure of the non-template DNA strand in the transcription bubble, expanding the repertoire of mechanisms to control transcription.
    1. Biochemistry and Chemical Biology

    Action of CMG with strand-specific DNA blocks supports an internal unwinding mode for the eukaryotic replicative helicase

    Lance Langston, Mike O’Donnell
    The CMG complex, the replicative helicase in eukaryotes, uses a different mechanism from bacterial and viral helicases by engaging both strands of parental DNA with substantial force and unwinding the duplex within the central channel of CMG.
    1. Biochemistry and Chemical Biology

    Rolling circle RNA synthesis catalyzed by RNA

    Emil Laust Kristoffersen, Matthew Burman ... Philipp Holliger
    All steps of a viroid-like replication cycle can be catalyzed by RNA alone.
    1. Microbiology and Infectious Disease
    2. Structural Biology and Molecular Biophysics

    Self-capping of nucleoprotein filaments protects the Newcastle disease virus genome

    Xiyong Song, Hong Shan ... Zhi-Jie Liu
    Structural and functional studies reveal how Newcastle disease virus nucleocapsid protects its viral genome through a self-capping mechanism, which is important for new antiviral drug design.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    A conserved MCM single-stranded DNA binding element is essential for replication initiation

    Clifford A Froelich, Sukhyun Kang ... Eric J Enemark
    The crystal structure of the MCM helicase bound to single-stranded DNA reveals a binding motif that is critical for cell viability, helicase activation and DNA replication.
    1. Structural Biology and Molecular Biophysics

    cryo-EM structures of the E. coli replicative DNA polymerase reveal its dynamic interactions with the DNA sliding clamp, exonuclease and τ

    Rafael Fernandez-Leiro, Julian Conrad ... Meindert H Lamers
    Structures of the replicative DNA polymerase Pol IIIα, the DNA sliding clamp, the proofreading exonuclease, and the processivity switch Tau (τ) suggest a mechanism for quick release during lagging strand synthesis.
    1. Biochemistry and Chemical Biology

    Ribozyme-catalysed RNA synthesis using triplet building blocks

    James Attwater, Aditya Raguram ... Philipp Holliger
    Adopting RNA trinucleotides as substrates, ribozymes can catalyse the copying of structured RNA sequences, allowing self-synthesis by part of a newly evolved symbiotic ribozyme pair.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Active site geometry stabilization of a presenilin homolog by the lipid bilayer promotes intramembrane proteolysis

    Lukas P Feilen, Shu-Yu Chen ... Harald Steiner
    Biochemical studies in combination with computational modeling and molecular dynamics simulations reveal that the lipid bilayer promotes intramembrane proteolysis by stabilizing the enzyme-substrate complex and the protease active site.
    1. Structural Biology and Molecular Biophysics
    2. Chromosomes and Gene Expression

    Non-Canonical G-quadruplexes cause the hCEB1 minisatellite instability in Saccharomyces cerevisiae

    Aurèle Piazza, Xiaojie Cui ... Alain G Nicolas
    A combination of genetics and biophysical approaches identifies an overlapping set of sequences that form non-canonical G-quadruplex structures in vitro and induce genomic instability in cells.
    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    Mcm10 promotes rapid isomerization of CMG-DNA for replisome bypass of lagging strand DNA blocks

    Lance D Langston, Ryan Mayle ... Mike E O'Donnell
    Biochemical data demonstrate an unexpected and critical function for the enigmatic Mcm10 protein in helping the eukaryotic CMG helicase/replisome bypass roadblocks on the DNA that may also explain Mcm10 function at origins of replication.

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