July 2013

Research articles

    1. Biophysics and Structural Biology

    Structural analysis of autoinhibition in the Ras-specific exchange factor RasGRP1

    Jeffrey S Iwig et al.
    A key activator of Ras signaling adopts an autoinhibited, dimeric conformation that is activated by membrane and calcium binding.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Cell Biology
    2. Neuroscience

    Dynamin phosphorylation controls optimization of endocytosis for brief action potential bursts

    Moritz Armbruster et al.
    The recycling of transmitter vesicles at synapses shows calcium-dependent regulation that depends on the phosphorylation status of an enzyme called dynamin.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Developmental Biology and Stem Cells
    2. Microbiology and Infectious Disease

    Functional genomic characterization of neoblast-like stem cells in larval Schistosoma mansoni

    Bo Wang et al.
    Cells that give rise to the infectious form of parasitic flatworms called schistosomes show similar patterns of gene expression to stem cells in free-living flatworms.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Biochemistry
    2. Cell Biology

    Minor introns are embedded molecular switches regulated by highly unstable U6atac snRNA

    Ihab Younis et al.
    Hundreds of cell growth and stress response genes are controlled by a rare small RNA component of an ancient splicing machinery, providing a raison d'être for its previously unexplained evolutionary conservation.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Biophysics and Structural Biology
    2. Microbiology and Infectious Disease

    In situ structural analysis of the Yersinia enterocolitica injectisome

    Mikhail Kudryashev et al.
    The basal body of the type-III secretion system of Yersinia enterocolitica within bacterial membranes shows elasticity and is longer than related isolated systems.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Biochemistry
    2. Cell Biology

    Sterol homeostasis requires regulated degradation of squalene monooxygenase by the ubiquitin ligase Doa10/Teb4

    Ombretta Foresti et al.
    Parallel branches of the ERAD pathway regulate sterol synthesis at multiple steps via feedback inhibition.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Neuroscience

    Segregation of complex acoustic scenes based on temporal coherence

    Sundeep Teki et al.
    Experiments with realistic acoustic stimuli have revealed that humans distinguish salient sounds from background noise by integrating frequency and temporal information.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Genes and Chromosomes

    A mammalian pseudogene lncRNA at the interface of inflammation and anti-inflammatory therapeutics

    Nicole A Rapicavoli et al.
    A long non-coding RNA regulates the expression of genes that encode proteins involved in the inflammatory response.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Cell Biology
    2. Microbiology and Infectious Disease

    Direct live imaging of cell–cell protein transfer by transient outer membrane fusion in Myxococcus xanthus

    Adrien Ducret et al.
    Physical contact between two Myxococcus xanthus cells is sufficient to fuse their outer membrane transiently and exchange outer membrane proteins and lipids at high efficiency.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Genes and Chromosomes
    2. Human Biology and Medicine

    MYBL2 is a sub-haploinsufficient tumor suppressor gene in myeloid malignancy

    Stefan Heinrichs et al.
    Reduced expression of MYBL2 contributes to malignancies of the blood by permitting uncontrolled expansion of blood cell progenitors, implying a tumor suppressor function for this gene.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Biochemistry
    2. Genes and Chromosomes

    The insulin receptor cellular IRES confers resistance to eIF4A inhibition

    Calla M Olson et al.
    Utilizing a conserved mechanism, a ribosome can initiate translation from a site within the insulin receptor mRNA to maintain protein synthesis even when standard mechanisms of initiating translation have been inhibited by stress.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Biophysics and Structural Biology

    Her2 activation mechanism reflects evolutionary preservation of asymmetric ectodomain dimers in the human EGFR family

    Anton Arkhipov et al.
    The structural basis for Her2's role as a dedicated heterodimerization partner for other EGFR family receptors is elucidated with long-timescale atomistic simulations.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Cell Biology

    An essential and NSF independent role for α-SNAP in store-operated calcium entry

    Yong Miao et al.
    α-SNAP mediated rearrangement of Stim1 and Orai1 molecules within CRAC channel clusters is required for store-operated calcium entry.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Biophysics and Structural Biology
    2. Human Biology and Medicine

    Structure-based discovery of fiber-binding compounds that reduce the cytotoxicity of amyloid beta

    Lin Jiang et al.
    By using structural methods to screen compounds for their ability to interact with amyloid beta, researchers have identified small molecules that stabilize amyloid fibers and reduce the toxic effect of smaller aggregates on cells.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Human Biology and Medicine

    Integrative genomic analysis of the human immune response to influenza vaccination

    Luis M Franco et al.
    By comparing gene expression in people before and after they received the influenza vaccine, researchers were able to identify genes that contribute to differences in individual responses to vaccination.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Cell Biology
    2. Developmental Biology and Stem Cells

    Nutrient restriction enhances the proliferative potential of cells lacking the tumor suppressor PTEN in mitotic tissues

    Katarzyna Nowak et al.
    Nutrient limitation elicits differential responses in cells lacking the tumor suppressor PTEN and in normal cells, resulting in hyperplastic overgrowth of PTEN mutant tissue independent of additional mutations.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Neuroscience

    Skill learning strengthens cortical representations of motor sequences

    Tobias Wiestler, Jörn Diedrichsen
    Detailed analysis of fMRI data shows that sequences of movements are associated with individual patterns of neural activity that become more distinct with training.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Biochemistry
    2. Biophysics and Structural Biology

    Phosphorylation-mediated PTEN conformational closure and deactivation revealed with protein semisynthesis

    David Bolduc et al.
    C-terminal phosphorylation of the lipid phosphatase PTEN drives a reduction in membrane affinity and leads to a more compact conformation that involves a C2 domain-tail interaction.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Cell Biology
    2. Developmental Biology and Stem Cells

    Apical targeting of the formin Diaphanous in Drosophila tubular epithelia

    Tal Rousso et al.
    Synergistic interactions with PI(4,5)P2 and activated Rho1, which are enriched at the apical membrane of tubular organs, facilitate tight apical targeting of the formin Diaphanous.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Biochemistry
    2. Biophysics and Structural Biology

    TRiC’s tricks inhibit huntingtin aggregation

    Sarah H Shahmoradian et al.
    Cryo-electron tomography reveals how a chaperone protein called TRiC reduces the ability of pathogenic mutant huntingtin proteins to form aggregates.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Biochemistry
    2. Cell Biology

    Hypothemycin, a fungal natural product, identifies therapeutic targets in Trypanosoma brucei

    Mari Nishino et al.
    Hypothemycin, which inhibits a number of protein kinases, kills the T. brucei parasites that cause sleeping sickness and reveals new therapeutic targets for the disorder.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Biophysics and Structural Biology

    Direct single molecule measurement of TCR triggering by agonist pMHC in living primary T cells

    Geoff P O'Donoghue et al.
    Quantitative observations of single-molecule binding between antigen and T cell receptor (TCR) in living primary T cells reveals unbinding kinetics, stoichiometry and signaling molecule recruitment, providing insights into the mechanisms of antigen recognition by the immune system.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Cell Biology
    2. Plant Biology

    Fluorescent sensors reporting the activity of ammonium transceptors in live cells

    Roberto De Michele et al.
    A modified form of Green Fluorescent Protein integrated into an ammonium transporter provides a sensor that can be used to monitor transport activity in vivo.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Neuroscience

    A longitudinal study of Caenorhabditis elegans larvae reveals a novel locomotion switch, regulated by Gαs signaling

    Stanislav Nagy et al.
    C. elegans exhibits two distinct behavioural macro-states, active and quiet wakefulness, and protein kinase A regulates switching between these two states.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Microbiology and Infectious Disease
    2. Plant Biology

    Fungal effector Ecp6 outcompetes host immune receptor for chitin binding through intrachain LysM dimerization

    Andrea Sánchez-Vallet et al.
    Structural and biochemical analysis of a protein called Ecp6, which is produced by a tomato fungus, reveals how the protein prevents plants from launching an immune response to the chitin in fungal cell walls.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Developmental Biology and Stem Cells
    2. Genomics and Evolutionary Biology

    The genome sequence of the colonial chordate, Botryllus schlosseri

    Ayelet Voskoboynik et al.
    The Botryllus schlosseri genome yields insights into the evolution of hematopoiesis.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf