November 2013

Research articles

    1. Biochemistry
    2. Biophysics and Structural Biology

    The role of Cdc42 and Gic1 in the regulation of septin filament formation and dissociation

    Yashar Sadian et al.
    Imaging with electron microscopy and cryo-electron tomography reveals that competition between Cdc42 and Gic1 for the same subunit within septins controls the formation and breakdown of septin filaments.
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    1. Developmental Biology and Stem Cells

    Developmental lineage priming in Dictyostelium by heterogeneous Ras activation

    Alex Chattwood et al.
    The probability of a cellular response to a differentiation inducing signal is correlated with the dynamic expression of a Ras protein, and produces a ‘salt and pepper’ pattern of cell differentiation.
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    1. Biophysics and Structural Biology
    2. Cell Biology

    Massive palmitoylation-dependent endocytosis during reoxygenation of anoxic cardiac muscle

    Mei-Jung Lin et al.
    Reoxygenation of anoxic cardiac tissue promotes massive endocytosis that is triggered by release of coenzymeA from mitochondria, followed by palmitoylation of membrane proteins, sarcolemma vesiculation, and transfer of sarolemma vesicles to large endosomes and vacuoles.
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    1. Biophysics and Structural Biology
    2. Cell Biology

    Massive endocytosis triggered by surface membrane palmitoylation under mitochondrial control in BHK fibroblasts

    Donald W Hilgemann et al.
    Mitochondria can trigger massive endocytosis by releasing coenzyme A into the cytoplasm and thereby promoting the addition of fatty acids to surface membrane proteins.
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    1. Biophysics and Structural Biology
    2. Neuroscience

    Tapered whiskers are required for active tactile sensation

    Samuel Andrew Hires et al.
    The tapered, conical shape of rodent whiskers is essential for sensor mobility in constrained spaces and feature extraction from textured surfaces.
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    1. Biochemistry
    2. Biophysics and Structural Biology

    Three-dimensional electron crystallography of protein microcrystals

    Dan Shi et al.
    A new electron diffraction technique called MicroED allows protein structures to be determined from three-dimensional microcrystals.
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    1. Developmental Biology and Stem Cells
    2. Human Biology and Medicine

    Expansion and conversion of human pancreatic ductal cells into insulin-secreting endocrine cells

    Jonghyeob Lee et al.
    Cells from the human pancreatic duct can be grown in culture and triggered to become insulin-producing cells, which could potentially be transplanted into patients with diabetes.
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    1. Developmental Biology and Stem Cells
    2. Genes and Chromosomes

    microRNA-1 regulates sarcomere formation and suppresses smooth muscle gene expression in the mammalian heart

    Amy Heidersbach et al.
    microRNA-1 plays an essential role in the development and functioning of the heart by ensuring that genes for striated, rather than smooth, muscle are expressed there.
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    1. Human Biology and Medicine
    2. Neuroscience

    Common resting brain dynamics indicate a possible mechanism underlying zolpidem response in severe brain injury

    Shawniqua T Williams et al.
    The therapeutic effects of the sleeping pill zolpidem in patients with disorders of consciousness may be due to recruitment of brain cells idling in abnormally low-frequency brain waves.
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    1. Neuroscience

    Position of UNC-13 in the active zone regulates synaptic vesicle release probability and release kinetics

    Keming Zhou et al.
    The precise position of UNC-13 at the active zone near a synapse depends on the N-terminus of the protein, and the C2A domain in particular, and is essential for accelerating neurotransmitter release.
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    1. Immunology
    2. Microbiology and Infectious Disease

    Essential yet limited role for CCR2+ inflammatory monocytes during Mycobacterium tuberculosis-specific T cell priming

    Miriam Samstein et al.
    Inflammatory monocytes carry live Mycobacteria from the lung to draining lymph nodes and acquire many characteristics of dendritic cells but fail to stimulate proliferation of CD4 T cells.
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    1. Biophysics and Structural Biology

    CO2 directly modulates connexin 26 by formation of carbamate bridges between subunits

    Louise Meigh et al.
    A CO2 receptor and a mechanism for the CO2-mediated opening of gap junction hemichannels have been identified.
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    1. Ecology
    2. Genomics and Evolutionary Biology

    Spatial self-organization favors heterotypic cooperation over cheating

    Babak Momeni et al.
    Two cooperative populations of yeast cells that cannot distinguish between cooperative partners and cheating intruders can still self-organize into clusters that exclude cheaters.
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    1. Neuroscience

    Deprivation-related and use-dependent plasticity go hand in hand

    Tamar R Makin et al.
    In individuals with a missing hand, the area of the brain that would otherwise control that hand is recruited by either the remaining hand or the residual limb, depending on the usage preference of the individual.
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    1. Biochemistry
    2. Biophysics and Structural Biology

    Intrinsic disorder within an AKAP-protein kinase A complex guides local substrate phosphorylation

    F Donelson Smith et al.
    Structural analysis of an AKAP18-protein kinase A complex reveals that regions of intrinsic disorder impact the phosphorylation of preferred substrates.
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    1. Human Biology and Medicine
    2. Immunology

    Expansion of intestinal Prevotella copri correlates with enhanced susceptibility to arthritis

    Jose U Scher et al.
    The sequencing of microbial genomes reveals that the presence of a particular microbial species in the gut may increase the risk of the autoimmune disease rheumatoid arthritis.
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    1. Biophysics and Structural Biology

    Subdued, a TMEM16 family Ca2+-activated Cl channel in Drosophila melanogaster with an unexpected role in host defense

    Xiu Ming Wong et al.
    A newly characterized calcium-activated chloride channel has been implicated in the immune system of Drosophila, shedding light on an enigmatic family of transmembrane proteins that are ubiquitous in nature.
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    1. Human Biology and Medicine

    BRAF inhibitors suppress apoptosis through off-target inhibition of JNK signaling

    Harina Vin et al.
    The cancer drug vemurafenib has potent off-target effects on JNK signaling that contribute to the development of squamous cell carcinomas in humans and in mice.
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    1. Cell Biology
    2. Genes and Chromosomes

    Sgol2 provides a regulatory platform that coordinates essential cell cycle processes during meiosis I in oocytes

    Ahmed Rattani et al.
    Shugoshin-like protein 2 (Sgol2) is involved in a variety of cell cycle process during the first stage of meiotic division.
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    1. Developmental Biology and Stem Cells

    A network of heterochronic genes including Imp1 regulates temporal changes in stem cell properties

    Jinsuke Nishino et al.
    A set of genes that are turned on only within time-limited windows—including genes encoding RNA binding molecules, let-7 microRNAs and IMP1—control developmental switches in stem cell properties between fetal development and adulthood.
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