808 results found
    1. Evolutionary Biology
    2. Microbiology and Infectious Disease

    An updated phylogeny of the Alphaproteobacteria reveals that the parasitic Rickettsiales and Holosporales have independent origins

    Sergio A Muñoz-Gómez, Sebastian Hess ... Andrew J Roger
    Diverse sophisticated phylogenetic analyses update the phylogeny of the Alphaproteobacteria and show that the parasitic Holosporales is a derived group within the Rhodospirillales order which comprises primarily free-living alphaproteobacteria.
    1. Computational and Systems Biology
    2. Developmental Biology

    Stochasticity in the miR-9/Hes1 oscillatory network can account for clonal heterogeneity in the timing of differentiation

    Nick E Phillips, Cerys S Manning ... Nancy Papalopulu
    Stochasticity introduced computationally into a gene expression oscillator creates heterogeneity in the time of differentiation of identical cells and offers robustness to the progenitor state and the outcome of cell division.
    1. Cancer Biology
    2. Developmental Biology

    PAX3-FOXO1 transgenic zebrafish models identify HES3 as a mediator of rhabdomyosarcoma tumorigenesis

    Genevieve C Kendall, Sarah Watson ... James F Amatruda
    The basic helix-loop-helix transcription factor, HES3, acts downstream of the PAX3-FOXO1 fusion oncogene to impair muscle differentiation and promote tumorigenesis in rhabdomyosarcoma, a childhood muscle cancer.
    1. Chromosomes and Gene Expression

    Tumor suppressor SMARCB1 suppresses super-enhancers to govern hESC lineage determination

    Lee F Langer, James M Ward, Trevor K Archer
    The chromatin remodeler and tumor suppressor SMARCB1 acts to restrict superenhancer function to direct neural differentiation of embryonic stem cells while repressing bivalent gene activity in the pluripotent state.
    1. Cell Biology
    2. Developmental Biology

    Heart of glass anchors Rasip1 at endothelial cell-cell junctions to support vascular integrity

    Bart-Jan de Kreuk, Alexandre R Gingras ... Mark H Ginsberg
    The proteins Heart of Glass (HEG1) and Rasip1 are both essential for cardiovascular development; and directly bind to each other to guide Rasip1 to endothelial cell junctions to support vascular integrity.
    1. Cell Biology
    2. Neuroscience

    Enhanced FIB-SEM systems for large-volume 3D imaging

    C Shan Xu, Kenneth J Hayworth ... Harald F Hess
    Complete neuronal circuits can be reconstructed, and whole eukaryotic cells imaged, at less than 10 nm isotropic resolution.
    1. Neuroscience
    2. Stem Cells and Regenerative Medicine

    Id4 promotes the elimination of the pro-activation factor Ascl1 to maintain quiescence of adult hippocampal stem cells

    Isabelle Maria Blomfield, Brenda Rocamonde ... Noelia Urbán
    Genetic and protein analyses in vitro and in vivo identifies Id4 as a novel regulator of stem cell quiescence in the adult hippocampus.
    1. Neuroscience

    A resource for the Drosophila antennal lobe provided by the connectome of glomerulus VA1v

    Jane Anne Horne, Carlie Langille ... Ian A Meinertzhagen
    FIB-SEM is used to identify comprehensively and reconstruct 192 neurons and their complete connectome for glomerulus VA1v of the Drosophila antennal lobe, in particular to reconstruct its local interneurons.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Structural and kinetic analysis of the COP9-Signalosome activation and the cullin-RING ubiquitin ligase deneddylation cycle

    Ruzbeh Mosadeghi, Kurt M Reichermeier ... Radoslav I Enchev
    The general principles that underlie the mechanism of action of the COP9-Signalosome, a key regulator of the largest family of ubiquitin ligase enzymes in human cells, have been identified using structural and kinetic techniques.
    1. Developmental Biology

    An Eya1-Notch axis specifies bipotential epibranchial differentiation in mammalian craniofacial morphogenesis

    Haoran Zhang, Li Wang ... Mai Har Sham
    Dephosphorylation of Notch1 intracellular domain by Eya1 leads to enhanced Notch signalling activity in the non-neuronal epibranchial placodal cells, revealing an essential regulation for the formation of proximal pharyngeal arches during mouse craniofacial development.

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