June 2013

Research articles

    1. Plant Biology

    Arabidopsis plants perform arithmetic division to prevent starvation at night

    Antonio Scialdone et al.
    Plants implement arithmetic division to optimize use of carbohydrate reserves and thus maintain metabolism and growth at night.
    1. Biochemistry
    2. Developmental Biology and Stem Cells

    CAMKII and Calcineurin regulate the lifespan of Caenorhabditis elegans through the FOXO transcription factor DAF-16

    Li Tao et al.
    Longevity in C. elegans is influenced not only by insulin/IGF-1 signalling, but also by CAMKII and calcineurin, acting on the same target, the transcription factor DAF-16.
    1. Neuroscience

    Dismantling the Papez circuit for memory in rats

    Seralynne D Vann
    In contrast to current models, inputs from midbrain limbic structures, but not from the hippocampus, are necessary for mammillary body contributions to memory.
    1. Neuroscience

    Rigid firing sequences undermine spatial memory codes in a neurodegenerative mouse model

    Jingheng Cheng, Daoyun Ji
    In a mouse model of neurodegeneration, hippocampal firing sequences that normally encode spatial memories become disengaged from external space.
    1. Genomics and Evolutionary Biology
    2. Human Biology and Medicine

    Evolutionary dynamics of cancer in response to targeted combination therapy

    Ivana Bozic et al.
    A study that models the evolution of drug resistance in tumors reveals that drugs are more effective when given in combination than sequentially, and that cure is much more likely when the drugs target different pathways.
    1. Genes and Chromosomes

    Condensin controls recruitment of RNA polymerase II to achieve nematode X-chromosome dosage compensation

    William S Kruesi et al.
    C. elegans equalizes the expression of X-chromosome genes between the sexes by reducing the recruitment of RNA polymerase II to promoters of X-linked genes in hermaphrodites, using a chromosome-restructuring complex called condensin.
    1. Developmental Biology and Stem Cells
    2. Genes and Chromosomes

    Histone demethylase Lsd1 represses hematopoietic stem and progenitor cell signatures during blood cell maturation

    Marc A Kerenyi et al.
    Lysine-specific demethylase 1 (Lsd1) has an essential role during both the early and later stages of blood cell development.
    1. Genomics and Evolutionary Biology

    Evolutionary principles of modular gene regulation in yeasts

    Dawn A Thompson et al.
    The divergence of gene regulation during evolution in yeast traces phylogenetic distance with prominent changes being associated with changes in lifestyle and a whole genome duplication event.
    1. Biochemistry
    2. Genomics and Evolutionary Biology

    The autoregulation of a eukaryotic DNA transposon

    Corentin Claeys Bouuaert et al.
    A DNA transposon, or ‘jumping gene’, controls its amplification within a genome through a competition between the enzyme multimers that are responsible for its mobility.
    1. Cell Biology
    2. Human Biology and Medicine

    Photoreceptor avascular privilege is shielded by soluble VEGF receptor-1

    Ling Luo et al.
    The eye produces a protein that inhibits the growth of blood vessels in the deep retina, which includes the photoreceptor layer, and disruption of this process can lead to blindness.
    1. Biophysics and Structural Biology

    Viral genome structures are optimal for capsid assembly

    Jason D Perlmutter et al.
    Computer simulations reveal that viral nucleic acids have an ideal structure for being packaged into outer protein shells called capsids.
    1. Biophysics and Structural Biology
    2. Cell Biology

    Scaffold nucleoporins Nup188 and Nup192 share structural and functional properties with nuclear transport receptors

    Kasper R Andersen et al.
    Components of the nuclear pore complex share structural and functional features with soluble nuclear transport receptors, which suggests that there may be an evolutionary relationship between these two types of protein.
    1. Biophysics and Structural Biology
    2. Cell Biology

    Intraflagellar transport drives flagellar surface motility

    Sheng Min Shih et al.
    The transport of proteins along flagellar microtubules generates the force that enables flagella to propel cells across surfaces.
    1. Plant Biology

    Temporal transcriptional response to ethylene gas drives growth hormone cross-regulation in Arabidopsis

    Katherine Noelani Chang et al.
    The plant hormone ethylene regulates the expression of multiple genes in the model plant Arabidopsis, including those that respond to other hormones.
    1. Genes and Chromosomes

    The homologous recombination machinery modulates the formation of RNA–DNA hybrids and associated chromosome instability

    Lamia Wahba et al.
    When a protein involved in DNA repair malfunctions, it can anneal RNA molecules to DNA molecules, creating hybrids that increase the frequency of mutations in the DNA.
    1. Developmental Biology and Stem Cells
    2. Genomics and Evolutionary Biology

    miR-124 controls male reproductive success in Drosophila

    Ruifen Weng et al.
    A small RNA molecule called miR-124 controls pheromone production and sexual behaviour in Drosophila by regulating sex-specific gene expression in males.
    1. Biochemistry
    2. Cell Biology

    MCU encodes the pore conducting mitochondrial calcium currents

    Dipayan Chaudhuri et al.
    Genetic and electrophysiological experiments reveal that a gene called MCU encodes the ion channel pore that allows calcium ions to cross the inner mitochondrial membrane.
    1. Biochemistry
    2. Biophysics and Structural Biology

    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. Genomics and Evolutionary Biology
    2. Human Biology and Medicine

    Passive and active DNA methylation and the interplay with genetic variation in gene regulation

    Maria Gutierrez-Arcelus et al.
    Detailed analysis of umbilical cord cells shows that the associations between DNA methylation, gene expression and genetic variation are complex and context-dependent.
    1. Cell Biology

    Stapled Golgi cisternae remain in place as cargo passes through the stack

    Gregory Lavieu et al.
    The cisternae of the Golgi contain two functionally distinct domains: the central areas, which remain stationary, and the edges or rims, which are mobile.