340 results found
    1. Structural Biology and Molecular Biophysics
    2. Microbiology and Infectious Disease

    Rift Valley fever phlebovirus NSs protein core domain structure suggests molecular basis for nuclear filaments

    Michal Barski et al.
    Insight into the molecular assembly of a protein with a central role in infections paves the way to understanding how Rift Valley fever virus causes disease.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Cryo-EM visualization of the ribosome in termination complex with apo-RF3 and RF1

    Jesper Pallesen et al.
    Cryo-electron microscopy has been used to provide a structural interpretation of the complete action cycle of release factor 3 during translation termination, which includes a coordinated sequence of interactions with a class-I release factor and the ribosome.
    1. Structural Biology and Molecular Biophysics

    Periodic DNA patrolling underlies diverse functions of Pif1 on R-loops and G-rich DNA

    Ruobo Zhou et al.
    Analyzing single molecules reveals that Pif1 family helicases periodically patrol DNA, which may explain this enzyme's ability to suppress genome instability at G-quadruplex motifs and transcriptional RNA-DNA hybrids (R-loops).
    1. Chromosomes and Gene Expression
    2. Developmental Biology

    Rif1 inhibits replication fork progression and controls DNA copy number in Drosophila

    Alexander Munden et al.
    To regulate DNA copy number during development in Drosophila, the SUUR protein recruits Rif1 to replisomes where Rif1 inhibits replication fork progression, thus controlling copy number independently of origin firing.
    1. Structural Biology and Molecular Biophysics

    Translational initiation factor eIF5 replaces eIF1 on the 40S ribosomal subunit to promote start-codon recognition

    Jose Luis Llácer et al.
    The N-terminal domain (NTD) of the initiation factor eIF5 bound to the 40S subunit at the precise location vacated by eIF1 promotes tRNAi accommodation at AUG codons.
    1. Chromosomes and Gene Expression
    2. Genetics and Genomics

    The role of Rif1 in telomere length regulation is separable from its role in origin firing

    Calla B Shubin, Carol W Greider
    Telomere length is linked to DNA replication, and we found excessive telomeric origin firing caused by several distinct mutants did not lengthen telomeres, narrowing possible mechanisms.
    1. Cell Biology
    2. Chromosomes and Gene Expression

    The RIF1-long splice variant promotes G1 phase 53BP1 nuclear bodies to protect against replication stress

    Lotte P Watts et al.
    The RIF1-long and short splice variants show distinct ability to protect cells from replication stress by promoting 53BP1 nuclear bodies, representing the first described functional difference between the two variants.
    1. Microbiology and Infectious Disease
    2. Structural Biology and Molecular Biophysics

    A contractile injection system stimulates tubeworm metamorphosis by translocating a proteinaceous effector

    Charles F Ericson et al.
    Bacteria produce a syringe-like structure, loaded with a single protein within the lumen of its needle-like tube, that is sufficient for stimulating animal metamorphosis.
    1. Chromosomes and Gene Expression

    A sharp Pif1-dependent threshold separates DNA double-strand breaks from critically short telomeres

    Jonathan Strecker et al.
    A sharp transition in the fate of DNA ends with telomere sequences is identified, which suggests a boundary between DNA double-strand breaks and telomeres.
    1. Cell Biology
    2. Neuroscience

    Tissue acidosis induces neuronal necroptosis via ASIC1a channel independent of its ionic conduction

    Yi-Zhi Wang et al.
    An interaction between the ion channel ASIC1a and the protein RIP1 is responsible for neuronal death caused by tissue acidosis.

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