43 results found
    1. Biochemistry and Chemical Biology

    Stepwise assembly of the human replicative polymerase holoenzyme

    Mark Hedglin et al.
    Fluorescence resonance energy transfer has been used to explore the interactions between DNA polymerases, sliding clamps and clamp loaders as DNA is replicated in human cells.
    1. Biochemistry and Chemical Biology

    A bacterial riboswitch class for the thiamin precursor HMP-PP employs a terminator-embedded aptamer

    Ruben M Atilho et al.
    Many bacteria use a tiny riboswitch aptamer to sense the thiamin precursor HMP-PP to regulate the production of another thiamin precursor HET-P to efficiently biosynthesize this essential coenzyme.
    1. Neuroscience

    Epigenetic regulation of lateralized fetal spinal gene expression underlies hemispheric asymmetries

    Sebastian Ocklenburg et al.
    Gene expression asymmetries in fetal spinal cord are triggered by epigenetic mechanisms suggesting that handedness has a spinal instead of a cortical origin.
    1. Chromosomes and Gene Expression

    RNA Polymerase II cluster dynamics predict mRNA output in living cells

    Won-Ki Cho et al.
    Quantitative super resolution imaging, in live mammalian cells, reveals a direct relationship between protein clustering dynamics and the number of mRNA transcribed at an endogenous gene locus.
    1. Biochemistry and Chemical Biology

    Reconstitution of a eukaryotic replisome reveals suppression mechanisms that define leading/lagging strand operation

    Roxana E Georgescu et al.
    The different polymerases at eukaryotic replication forks achieve their asymmetric placement on the leading and lagging strands through exclusion processes that prevent their function on the 'wrong' strand.
    1. Biochemistry and Chemical Biology

    Ribozyme-catalysed RNA synthesis using triplet building blocks

    James Attwater et al.
    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. Structural Biology and Molecular Biophysics
    2. Chromosomes and Gene Expression

    The mechanism of variability in transcription start site selection

    Libing Yu et al.
    Variability in bacterial transcription start site selection involves DNA “scrunching” and “anti-scrunching,” which may represent a general mechanism for start site selection in all organisms.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Structure of a bacterial RNA polymerase holoenzyme open promoter complex

    Brian Bae et al.
    The crystal structure of bacterial RNA polymerase bound to the transcription bubble reveals key features that support the formation of a double-strand/single-strand DNA junction at the upstream edge of the −10 element where bubble formation initiates.
    1. Chromosomes and Gene Expression

    Multi-step coordination of telomerase recruitment in fission yeast through two coupled telomere-telomerase interfaces

    Xichan Hu et al.
    A telomerase recruitment mechanism delivers cell cycle information to the telomere-telomerase interface to ensure timely telomerase engagement at the telomere.
    1. Chromosomes and Gene Expression

    Crl activates transcription by stabilizing active conformation of the master stress transcription initiation factor

    Juncao Xu et al.
    The cryo-EM structure of Escherichia coli Crl–TAC reveals the mechanism of DNA-contact-independent transcription activation.

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