5,613 results found
    1. Chromosomes and Gene Expression

    Identification of protein-protected mRNA fragments and structured excised intron RNAs in human plasma by TGIRT-seq peak calling

    Jun Yao et al.
    Human plasma contains protein-protected mRNA fragments, myriad repeat RNAs, and novel intron RNAs, including a family of structured full-length excised introns, some corresponding to mirtron pre-miRNAs and agotrons.
    1. Structural Biology and Molecular Biophysics

    Structural basis of transcription inhibition by the DNA mimic protein Ocr of bacteriophage T7

    Fuzhou Ye et al.
    DNA mimicry Ocr protein, a well-studied T7 phage protein that inhibits host restriction enzymes, can also inhibit host transcription through competing with sigma factors in binding to RNA polymerase.
    1. Structural Biology and Molecular Biophysics

    Structural basis for recognition and remodeling of the TBP:DNA:NC2 complex by Mot1

    Agata Butryn et al.
    A structural analysis of the transcription regulator Mot1 in complex with promoter DNA and the proteins TBP and NC2 provides a first structural framework for how a Swi2/Snf2 type remodeler interacts with a histone fold protein:DNA complex.
    1. Structural Biology and Molecular Biophysics

    Structural dynamics of E. coli single-stranded DNA binding protein reveal DNA wrapping and unwrapping pathways

    Sukrit Suksombat et al.
    Single-molecule force and fluorescence spectroscopy reveal the structural states and dynamics of E. coli single-stranded DNA binding proteins and the energy landscape of the nucleo–protein complex.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Human Holliday junction resolvase GEN1 uses a chromodomain for efficient DNA recognition and cleavage

    Shun-Hsiao Lee et al.
    The crystal structure of human Holliday junction resolvase GEN1 in complex with DNA reveals a conserved chromodomain as an additional DNA-anchoring point that opens new perspectives for enzyme regulation.
    1. Structural Biology and Molecular Biophysics
    2. Chromosomes and Gene Expression

    Dna2 nuclease-helicase structure, mechanism and regulation by Rpa

    Chun Zhou et al.
    X-ray crystallography reveals that the Dna2 nuclease-helicase contains a long tunnel through which single-stranded DNA threads, and an allosteric mechanism for displacing the DNA-binding protein Rpa that restricts cleavage to the proper polarity.
    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 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. Structural Biology and Molecular Biophysics

    Cryo-EM structure of the Plasmodium falciparum 80S ribosome bound to the anti-protozoan drug emetine

    Wilson Wong et al.
    The molecular mechanism behind how emetine inhibits the ribosome of the human malaria parasite, along with structural details of the complex formed, is revealed at high resolution using cryo-electron microscopy.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Structural basis of nucleic-acid recognition and double-strand unwinding by the essential neuronal protein Pur-alpha

    Janine Weber et al.
    The crystal structure of Pur-alpha in complex with DNA reveals its molecular mechanisms of nucleic-acid binding and unwinding, allowing for a better understanding of its essential role in neurons.

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