12 results found
    1. Genetics and Genomics
    2. Microbiology and Infectious Disease

    Transcription termination and antitermination of bacterial CRISPR arrays

    Anne M Stringer et al.
    Many bacteria use the Nus factor antitermination complex to prevent premature Rho-dependent transcription termination of their CRISPR arrays.
    1. Structural Biology and Molecular Biophysics
    2. Microbiology and Infectious Disease

    Drastic changes in conformational dynamics of the antiterminator M2-1 regulate transcription efficiency in Pneumovirinae

    Cedric Leyrat et al.
    A combination of X-ray crystallography, molecular dynamics and small angle X-ray scattering shows that the transcription antiterminator M2-1 is a structurally dynamic homotetramer that undergoes large concerted conformational changes upon binding its target RNA.
    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 et al.
    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

    Regulation of mRNA translation by a photoriboswitch

    Kelly A Rotstan et al.
    A synthetic riboswitch binding one isoform of a photoreversible ligand provides a photoregulatory tool for bacterial translation initiation.
    1. Structural Biology and Molecular Biophysics

    Specific structural elements of the T-box riboswitch drive the two-step binding of the tRNA ligand

    Jiacheng Zhang et al.
    The glycine T-box riboswitch recognizes tRNAgly and senses its aminoacylation state by first interacting with the anticodon region and subsequently probing the 3' end of the ligand using both specific structural elements and conformational dynamics.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Structural basis of transcription arrest by coliphage HK022 Nun in an Escherichia coli RNA polymerase elongation complex

    Jin Young Kang et al.
    Cryo-electron microscopy structures show how coliphage HK022 Nun blocks Escherichia coli RNA polymerase translocation by mediating multiple interactions between the RNA polymerase and nucleic acids.
    1. Microbiology and Infectious Disease

    Bacterial symbiont subpopulations have different roles in a deep-sea symbiosis

    Tjorven Hinzke et al.
    Physiological differentiation during symbiosis leads to division of labor between smaller and larger cells in an uncultured bacterial tubeworm symbiont population and results in remarkable metabolic diversity and complexity.
    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    The elemental mechanism of transcriptional pausing

    Jason Saba et al.
    Biochemical analyses of transcription complexes, including kinetic studies and probes of translocational and conformational states, establish the elemental mechanism of pausing, which underlies regulation of gene expression in all organisms.
    1. Biochemistry and Chemical Biology

    Tandem riboswitches form a natural Boolean logic gate to control purine metabolism in bacteria

    Madeline E Sherlock et al.
    A riboswitch class has been discovered for phosphoribosyl pyrophosphate, the biochemical precursor of nucleotides, and this novel RNA sensor commonly operates in tandem with a guanine aptamer to function like a Boolean logic gate.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Pausing guides RNA folding to populate transiently stable RNA structures for riboswitch-based transcription regulation

    Hannah Steinert et al.
    The discontinuous speed of transcription enables riboswitch molecules to adopt meta-stable structures in response to the presence of their cognate ligand, thereby gene-regulation by means of structure induced transcription termination can occur.

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