May 2014

Research articles

    1. Cell Biology

    Structure of cellular ESCRT-III spirals and their relationship to HIV budding

    Anil G Cashikar et al.
    Electron microscopy on native membranes reveals the shape and potential function of protein machinery responsible for budding vesicles and viruses away from the cytoplasm.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Developmental Biology and Stem Cells

    TAF7L modulates brown adipose tissue formation

    Haiying Zhou et al.
    TAF7L acts as a molecular switch that regulates the development of mesenchymal stem cells.
    Short Report
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Cell Biology
    2. Developmental Biology and Stem Cells

    Coordinated control of senescence by lncRNA and a novel T-box3 co-repressor complex

    Pavan Kumar P et al.
    A novel master regulatory mechanism of cell proliferation and senscence employs the lncRNA UCA1 and a CAPERα/TBX3 corepressor.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Biochemistry
    2. Cell Biology

    Cyclin D activates the Rb tumor suppressor by mono-phosphorylation

    Anil M Narasimha et al.
    The retinoblastoma tumor suppressor regulates cell cycle progression when it's in 14 mono-phosphorylated isoforms.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Biophysics and Structural Biology
    2. Human Biology and Medicine

    Rheotaxis facilitates upstream navigation of mammalian sperm cells

    Vasily Kantsler et al.
    Mammalian sperm subject to shear flow swim in upstream spirals along the walls bounding such flows, thereby demonstrating a robust mechanism for upstream navigation to the ovum.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Cell Biology

    Transport of soluble proteins through the Golgi occurs by diffusion via continuities across cisternae

    Galina V Beznoussenko et al.
    The soluble cargo protein albumin traverses the Golgi stack at much faster rates than procollagen aggregates, by diffusion via intercisternal continuities.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Biochemistry
    2. Biophysics and Structural Biology

    Molecular mechanism of Aurora A kinase autophosphorylation and its allosteric activation by TPX2

    Adelajda Zorba et al.
    Aurora A kinase, an anti-cancer drug target, can be activated by two independent mechanisms.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Developmental Biology and Stem Cells
    2. Neuroscience

    Distinct and separable roles for EZH2 in neurogenic astroglia

    William W Hwang et al.
    A number of genes associated with the development of brain tumors are epigenetically repressed in specialized astrocytes to enable the production of neurons in the postnatal brain.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Cell Biology

    Ki-67 is a PP1-interacting protein that organises the mitotic chromosome periphery

    Daniel G Booth et al.
    The mitotic chromosome periphery is organised by the PP1 binding protein Ki-67 and contributes to nucleolar re-activation upon mitotic exit.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Genes and Chromosomes
    2. Human Biology and Medicine

    Global analysis of p53-regulated transcription identifies its direct targets and unexpected regulatory mechanisms

    Mary Ann Allen et al.
    The first global analysis of the effects of the transcription factor p53 on RNA synthesis illuminates several novels aspects of the molecular mechanism of action of this potent tumor suppressor.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Neuroscience

    A neural mechanism of speed-accuracy tradeoff in macaque area LIP

    Timothy Hanks et al.
    To establish a trade-off between the speed and accuracy of a decision, neurons in lateral intraparietal cortex combine evidence bearing on the decision with a signal that incorporates the cost of time into the decision-making process.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Biochemistry
    2. Biophysics and Structural Biology

    Hsp70 chaperones are non-equilibrium machines that achieve ultra-affinity by energy consumption

    Paolo De Los Rios, Alessandro Barducci
    ATP consumption enables chaperones to exploit the different kinetic properties of their conformational states to exhibit a non-equilibrium affinity for their substrates that is orders of magnitude higher than its equilibrium value.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Plant Biology

    Cell elongation is regulated through a central circuit of interacting transcription factors in the Arabidopsis hypocotyl

    Eunkyoo Oh et al.
    Signals from major hormones and the environment are integrated in the Arabidopsis hypocotyl to control gene expression and plant stem elongation.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Cell Biology
    2. Genomics and Evolutionary Biology

    Characterization of TSET, an ancient and widespread membrane trafficking complex

    Jennifer Hirst et al.
    A missing link between the AP complexes and COPI sheds light on the evolution of vesicle coat proteins and trafficking pathways in the earliest eukaryotes.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Genomics and Evolutionary Biology
    2. Plant Biology

    Natural variation reveals that intracellular distribution of ELF3 protein is associated with function in the circadian clock

    Muhammad Usman Anwer et al.
    In Arabidopsis, a natural variant of the ELF3 protein, which originated in Central Asia, is less likely to accumulate in the nucleus, and causes the circadian clock to run faster and be less responsive to environmental cues.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Genes and Chromosomes
    2. Genomics and Evolutionary Biology

    MicroRNAs shape circadian hepatic gene expression on a transcriptome-wide scale

    Ngoc-Hien Du et al.
    In the liver, microRNAs exert widespread functions in the modulation of phases and amplitudes of clock-controlled gene expression, but their influence on the core clock is remarkably mild.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Neuroscience

    Neuronal connectome of a sensory-motor circuit for visual navigation

    Nadine Randel et al.
    Three-dimensional mapping of the neural circuitry that controls movement of a marine worm in response to light provides insights into the evolution of complex visual systems.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Cell Biology
    2. Microbiology and Infectious Disease

    Evidence for a DNA-relay mechanism in ParABS-mediated chromosome segregation

    Hoong Chuin Lim et al.
    In vitro, in vivo and in silico evidence suggests that bacteria exploit intrinsic chromosomal fluctuations to achieve intracellular transport.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Plant Biology

    Phosphoprotein SAK1 is a regulator of acclimation to singlet oxygen in Chlamydomonas reinhardtii

    Setsuko Wakao et al.
    SAK1, a novel cytoplasmic phosphoprotein, is a key intermediate component of the retrograde signaling pathway controlling nuclear gene expression during acclimation of Chlamydomonas cells to singlet oxygen stress.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Cell Biology
    2. Developmental Biology and Stem Cells

    miR-142 orchestrates a network of actin cytoskeleton regulators during megakaryopoiesis

    Elik Chapnik et al.
    miR-142 is instrumental for actin homeostasis, and its loss disrupts the cytoskeleton organization and thrombopoiesis of megakaryocytes.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Neuroscience

    The inhibitory microcircuit of the substantia nigra provides feedback gain control of the basal ganglia output

    Jennifer Brown et al.
    Negative feedback signals within the substantia nigra regulate the output of the basal ganglia, with implications for disorders such as Parkinson's disease.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Developmental Biology and Stem Cells

    Local cell interactions and self-amplifying individual cell ingression drive amniote gastrulation

    Octavian Voiculescu et al.
    A combination of two local cell interactions, intercalation and ingression amplified by a community-effect, is sufficient to explain the global movements of amniote gastrulation.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Neuroscience

    Inferring eye position from populations of lateral intraparietal neurons

    Arnulf BA Graf, Richard A Andersen
    An area of visual-motor cortex called the lateral intraparietal area encodes eye position signals that support visually-guided behaviors and image stabilization.
    Short Report
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Cell Biology
    2. Genes and Chromosomes

    Imaging the fate of histone Cse4 reveals de novo replacement in S phase and subsequent stable residence at centromeres

    Jan Wisniewski et al.
    Internally tagged, functional Cse4/CENP-A/CenH3 histone variant is exclusively centromeric and stable through the budding yeast cell cycle after replacement in S phase.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Cell Biology
    2. Genes and Chromosomes

    Expression site attenuation mechanistically links antigenic variation and development in Trypanosoma brucei

    Christopher Batram et al.
    The VSG gene controls its monoallelic expression, and expression site activity determines developmental progression.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Cell Biology
    2. Human Biology and Medicine

    Pharmacological inhibition of cystine–glutamate exchange induces endoplasmic reticulum stress and ferroptosis

    Scott J Dixon et al.
    Erastin and sorafenib inhibit system xc- and induce ER stress, suggesting these may be useful tools for probing the functions of system xc- and its role in inducing ER stress and ferroptosis.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Cell Biology
    2. Human Biology and Medicine

    MELK is an oncogenic kinase essential for mitotic progression in basal-like breast cancer cells

    Yubao Wang et al.
    Maternal embryonic leucine zipper kinase (MELK) is a new anti-cancer target that is highly selective for basal-like breast cancer.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Genes and Chromosomes
    2. Genomics and Evolutionary Biology

    MOF-associated complexes ensure stem cell identity and Xist repression

    Tomasz Chelmicki et al.
    Two complexes that contain the histone acetyl transferase MOF engage in a two-pronged approach to ensure the repression of X inactivation in mouse embryonic stem cells.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Biophysics and Structural Biology
    2. Microbiology and Infectious Disease

    Drastic changes in conformational dynamics of the antiterminator M2-1 regulate transcription efficiency in Pneumovirinae

    Cedric Leyrat et al.
    A combination of X-ray crystallography, molecular dynamics and small angle X-ray scattering shows that the transcription antiterminator M2-1 is a structurally dynamic homotetramer that undergoes large concerted conformational changes upon binding its target RNA.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Immunology

    T cell-intrinsic role of IL-6 signaling in primary and memory responses

    Simone A Nish et al.
    IL-6 signaling in T cells controls how sensitive they are to suppression by T regulatory cells, and the way mature to become memory T cells.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Biophysics and Structural Biology
    2. Neuroscience

    Coupled ion binding and structural transitions along the transport cycle of glutamate transporters

    Grégory Verdon et al.
    Crystal structures of an archaeal homologue of mammalian glutamate transporters in apo and ion-only bound outward- and inward-facing states reveal ion-coupled conformational changes supporting mechanisms of coupling, gating, and transport.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Cell Biology

    SLY1 and Syntaxin 18 specify a distinct pathway for procollagen VII export from the endoplasmic reticulum

    Cristina Nogueira et al.
    A cross-linking screen finds proteins that interact with TANGO1 to export Procollagen VII, and suggests a new model for the secretion of these bulky cargoes that are involved in skin and bone formation.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Biochemistry
    2. Biophysics and Structural Biology

    Conformational dynamics of the nucleotide binding domains and the power stroke of a heterodimeric ABC transporter

    Smriti Mishra et al.
    The conformational cycle of an ABC heterodimeric transporter reveals a divergence in the structural mechanism of ABC exporters.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Biochemistry
    2. Cell Biology

    SM proteins Sly1 and Vps33 co-assemble with Sec17 and SNARE complexes to oppose SNARE disassembly by Sec18

    Braden T Lobingier et al.
    Sec1/Munc18 (SM) proteins shield SNARE complexes from NSF/Sec18-mediated disassembly through cooperative binding interactions with SNARE complexes and the universal co-chaperone α-SNAP/Sec17.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Neuroscience

    Atoh1-dependent rhombic lip neurons are required for temporal delay between independent respiratory oscillators in embryonic mice

    Srinivasan Tupal et al.
    The rhythmic patterns of activity that underlie breathing are generated and coordinated by distinct populations of neurons within the brainstem.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Human Biology and Medicine

    Metformin inhibits mitochondrial complex I of cancer cells to reduce tumorigenesis

    William W Wheaton et al.
    The anti-diabetic drug metformin, currently in clinical trials as a potential anti-cancer agent, reduces tumor growth by inhibiting mitochondrial complex I of human cancer cells.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Ecology
    2. Genomics and Evolutionary Biology

    Climate-mediated cooperation promotes niche expansion in burying beetles

    Syuan-Jyun Sun et al.
    Cooperation enables burying beetles to outcompete flies and adapt to a wider range of temperatures as thermal generalists.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Immunology

    Pak2 is required for actin cytoskeleton remodeling, TCR signaling, and normal thymocyte development and maturation

    Hyewon Phee et al.
    The p21-activated kinase 2 (Pak2) is an essential regulator that governs the actin cytoskeleton-dependent signaling to ensure normal thymocyte development, maturation and egress.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Genes and Chromosomes
    2. Genomics and Evolutionary Biology

    Tyrosine phosphorylation of RNA polymerase II CTD is associated with antisense promoter transcription and active enhancers in mammalian cells

    Nicolas Descostes et al.
    Genome-wide analysis reveals novel functions for a post-translational modification to the carboxy-terminal domain (CTD) of RNA Polymerase II in mammals.
    Short Report
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Biochemistry
    2. Genes and Chromosomes

    Distinct stages of the translation elongation cycle revealed by sequencing ribosome-protected mRNA fragments

    Liana F Lareau et al.
    The size of the mRNA fragment protected by a ribosome depends on the ribosome's conformation, which enables studies of the distinct steps of decoding and translocation at single-codon resolution.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Biophysics and Structural Biology
    2. Neuroscience

    Re-examining how complexin inhibits neurotransmitter release

    Thorsten Trimbuch et al.
    Challenging a widespread model, biophysical and electrophysiological experiments suggest a new mechanism whereby complexins inhibit neurotransmitter release through electrostatic repulsion between their accessory helix and the membranes.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Neuroscience

    Cell-intrinsic mechanisms of temperature compensation in a grasshopper sensory receptor neuron

    Frederic A Roemschied et al.
    The firing rates of neurons in the grasshopper auditory system are surprisingly robust to changes in temperature, and cell-intrinsic mechanisms are sufficient to explain this temperature insensitivity.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Biochemistry
    2. Cell Biology

    RNAP II CTD tyrosine 1 performs diverse functions in vertebrate cells

    Jing-Ping Hsin et al.
    Phosphorylation of tyrosine 1 in the carboxy-terminal domain (CTD) of the largest subunit of RNA Polymerase (RNAP) II functions to stabilize this domain, and facilitates turnover of upstream antisense RNAs.
    Short Report
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Cell Biology
    2. Neuroscience

    Complete morphologies of basal forebrain cholinergic neurons in the mouse

    Hao Wu et al.
    The first complete 3D structures of mouse cholinergic neurons reveal the length and complexity of their axons, while calculations suggest that equivalent axons in the human brain are approximately than 100 meters long.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Developmental Biology and Stem Cells

    Prospective identification of functionally distinct stem cells and neurosphere-initiating cells in adult mouse forebrain

    John K Mich et al.
    Flow cytometric isolation and fate mapping shows that neurosphere-initiating cells are highly mitotically active and persist only transiently in vivo, and are distinct from quiescent, long-lived neural stem cells.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Neuroscience

    Cerebellar modules operate at different frequencies

    Haibo Zhou et al.
    Zebrin-positive cerebellar Purkinje cells fire at lower frequencies than zebrin-negative cells, indicating that cerebellar circuits are not physiologically homogeneous.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Ecology
    2. Epidemiology and Global Health

    Hidden shift of the ionome of plants exposed to elevated CO2 depletes minerals at the base of human nutrition

    Irakli Loladze
    Increasing levels of atmospheric carbon dioxide reduce the mineral content but increase the levels of starch and sugars found in crop plants; which could exacerbate both obesity and malnutrition in some human populations.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Cell Biology
    2. Immunology

    Epidermal barrier defects link atopic dermatitis with altered skin cancer susceptibility

    Sara Cipolat et al.
    A mouse model of atopic dermatitis provides mechanistic evidence for an association between allergic disease and skin cancer.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Cell Biology

    A sphingolipid-dependent diffusion barrier confines ER stress to the yeast mother cell

    Lori Clay et al.
    Sphingolipids govern the compartmentalization of yeast cells through the assembly of lateral diffusion barriers in ER membranes.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Genes and Chromosomes

    SETD2 is required for DNA double-strand break repair and activation of the p53-mediated checkpoint

    Sílvia Carvalho et al.
    The involvement of SETD2 in an important DNA repair pathway could explain the high frequency of SETD2 mutations in several cancers and may provide an alternative mechanism to evade the p53-mediated checkpoint.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Biochemistry
    2. Cell Biology

    The translational landscape of the splicing factor SRSF1 and its role in mitosis

    Magdalena M Maslon et al.
    Identifying the translational targets of the shuttling protein, SRSF1, reveals that it is needed for normal cell division, and suggests that it couples pre-mRNA splicing and translation.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf
    1. Biochemistry
    2. Biophysics and Structural Biology

    Bacterial actin MreB forms antiparallel double filaments

    Fusinita van den Ent et al.
    The prokaryotic actin homologue MreB forms antiparallel double filaments in vitro and in vivo, an architecture that is unprecedented among the actin family of proteins.
    Research Article
    Available as full, typeset article htmlAvailable as authors' accepted manuscript pdf