Abstract:
:The actomyosin ring generates force to ingress the cytokinetic cleavage furrow in animal cells, yet its filament organization and the mechanism of contractility is not well understood. We quantified actin filament order in human cells using fluorescence polarization microscopy and found that cleavage furrow ingression initiates by contraction of an equatorial actin network with randomly oriented filaments. The network subsequently gradually reoriented actin filaments along the cell equator. This strictly depended on myosin II activity, suggesting local network reorganization by mechanical forces. Cortical laser microsurgery revealed that during cytokinesis progression, mechanical tension increased substantially along the direction of the cell equator, while the network contracted laterally along the pole-to-pole axis without a detectable increase in tension. Our data suggest that an asymmetric increase in cortical tension promotes filament reorientation along the cytokinetic cleavage furrow, which might have implications for diverse other biological processes involving actomyosin rings.
journal_name
Elifejournal_title
eLifeauthors
Spira F,Cuylen-Haering S,Mehta S,Samwer M,Reversat A,Verma A,Oldenbourg R,Sixt M,Gerlich DWdoi
10.7554/eLife.30867subject
Has Abstractpub_date
2017-11-06 00:00:00issn
2050-084Xjournal_volume
6pub_type
杂志文章相关文献
eLife文献大全abstract::Negative feedback regulation, that is the ability of a gene to repress its own synthesis, is the most abundant regulatory motif known to biology. Frequently reported for transcriptional regulators, negative feedback control relies on binding of a transcription factor to its own promoter. Here, we report a novel mechan...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.58836
更新日期:2020-08-03 00:00:00
abstract::While the dynamin GTPase Drp1 plays a critical role during mitochondrial fission, mechanisms controlling its recruitment to fission sites are unclear. A current assumption is that cytosolic Drp1 is recruited directly to fission sites immediately prior to fission. Using live-cell microscopy, we find evidence for a diff...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.11553
更新日期:2015-11-26 00:00:00
abstract::To understand the neural origins of rhythmic behavior one must characterize the central pattern generator circuit and quantify the population size needed to sustain functionality. Breathing-related interneurons of the brainstem pre-Bötzinger complex (preBötC) that putatively comprise the core respiratory rhythm genera...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.03427
更新日期:2014-07-15 00:00:00
abstract::Polarity is a shared feature of most cells. In epithelia, apical-basal polarity often coexists, and sometimes intersects with planar cell polarity (PCP), which orients cells in the epithelial plane. From a limited set of core building blocks (e.g. the Par complexes for apical-basal polarity and the Frizzled/Dishevelle...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.25014
更新日期:2017-06-30 00:00:00
abstract::Recent advances in single-cell transcriptomics techniques have opened the door to the study of gene regulatory networks (GRNs) at the single-cell level. Here, we studied the GRNs controlling the emergence of hematopoietic stem and progenitor cells from mouse embryonic endothelium using a combination of single-cell tra...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.29312
更新日期:2018-03-20 00:00:00
abstract::Transposable elements (TEs), the movement of which can damage the genome, are epigenetically silenced in eukaryotes. Intriguingly, TEs are activated in the sperm companion cell - vegetative cell (VC) - of the flowering plant Arabidopsis thaliana. However, the extent and mechanism of this activation are unknown. Here w...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.42530
更新日期:2019-05-28 00:00:00
abstract::The roles of long non-coding RNAs (lncRNAs) in regulating cancer and stem cells are being increasingly appreciated. Its diverse mechanisms provide the regulatory network with a bigger repertoire to increase complexity. Here we report a novel LncRNA, Lnc34a, that is enriched in colon cancer stem cells (CCSCs) and initi...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.14620
更新日期:2016-04-14 00:00:00
abstract::Proteins can self-organize into spatial patterns via non-linear dynamic interactions on cellular membranes. Modelling and simulations have shown that small GTPases can generate patterns by coupling guanine nucleotide exchange factors (GEF) to effectors, generating a positive feedback of GTPase activation and membrane ...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.54434
更新日期:2020-06-08 00:00:00
abstract::Experience-dependent modifications of synaptic connections are thought to change patterns of network activities and stimulus tuning with learning. However, only a few studies explored how synaptic plasticity shapes the response dynamics of cortical circuits. Here, we investigated the mechanism underlying sharpening of...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.44098
更新日期:2019-08-08 00:00:00
abstract::The human face represents a combined set of highly heritable phenotypes, but knowledge on its genetic architecture remains limited, despite the relevance for various fields. A series of genome-wide association studies on 78 facial shape phenotypes quantified from 3-dimensional facial images of 10,115 Europeans identif...
journal_title:eLife
pub_type: 杂志文章,meta分析
doi:10.7554/eLife.49898
更新日期:2019-11-26 00:00:00
abstract::The calcium release-activated calcium channel Orai regulates Ca2+ entry into non-excitable cells and is required for proper immune function. While the channel typically opens following Ca2+ release from the endoplasmic reticulum, certain pathologic mutations render the channel constitutively open. Previously, using on...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.62772
更新日期:2020-11-30 00:00:00
abstract::Aedes aegypti transmit pathogenic arboviruses while the mosquito itself tolerates the infection. We examine a piRNA-based immunity that relies on the acquisition of viral derived cDNA (vDNA) and how this pathway discriminates between self and non-self. The piRNAs derived from these vDNAs are essential for virus contro...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.41244
更新日期:2019-10-17 00:00:00
abstract::Repression of genes by Polycomb requires that PRC2 modifies their chromatin by trimethylating lysine 27 on histone H3 (H3K27me3). At transcriptionally active genes, di- and tri-methylated H3K36 inhibit PRC2. Here, the cryo-EM structure of PRC2 on dinucleosomes reveals how binding of its catalytic subunit EZH2 to nucle...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.61964
更新日期:2020-11-19 00:00:00
abstract::Evolution persistently undermines vector control programs through insecticide resistance. Here we propose a novel strategy which instead exploits evolution to generate and sustain new control tools. Effective spatial repellents are needed to keep vectors out of houses. Our approach generates such new repellents by com...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.15416
更新日期:2016-10-25 00:00:00
abstract::We studied the role of the synaptic ribbon for sound encoding at the synapses between inner hair cells (IHCs) and spiral ganglion neurons (SGNs) in mice lacking RIBEYE (RBEKO/KO). Electron and immunofluorescence microscopy revealed a lack of synaptic ribbons and an assembly of several small active zones (AZs) at each ...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.29275
更新日期:2018-01-12 00:00:00
abstract::C-type inactivation of potassium channels fine-tunes the electrical signaling in excitable cells through an internal timing mechanism that is mediated by a hydrogen bond network in the channels' selectively filter. Previously, we used nonsense suppression to highlight the role of the conserved Trp434-Asp447 indole hyd...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.18976
更新日期:2016-10-06 00:00:00
abstract::In Drosophila larvae, Class IV sensory neurons respond to noxious thermal stimuli and provoke heat avoidance behavior. Previously, we showed that the activated neurons displayed characteristic fluctuations of firing rates, which consisted of repetitive high-frequency spike trains and subsequent pause periods, and we p...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.29754
更新日期:2017-10-16 00:00:00
abstract::Synaptic adhesion molecules regulate synapse development and function. However, whether and how presynaptic adhesion molecules regulate postsynaptic NMDAR function remains largely unclear. Presynaptic LAR family receptor tyrosine phosphatases (LAR-RPTPs) regulate synapse development through mechanisms that include tra...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.54224
更新日期:2020-03-06 00:00:00
abstract::Pore-blocking toxins inhibit voltage-dependent K(+) channels (Kv channels) by plugging the ion-conduction pathway. We have solved the crystal structure of paddle chimera, a Kv channel in complex with charybdotoxin (CTX), a pore-blocking toxin. The toxin binds to the extracellular pore entryway without producing discer...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.00594
更新日期:2013-05-21 00:00:00
abstract::Asymmetric disassembly of the synaptonemal complex (SC) is crucial for proper meiotic chromosome segregation. However, the signaling mechanisms that directly regulate this process are poorly understood. Here we show that the mammalian Rho GEF homolog, ECT-2, functions through the conserved RAS/ERK MAP kinase signaling...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.12039
更新日期:2016-02-27 00:00:00
abstract::Seasonal influenza virus A/H3N2 is a major cause of death globally. Vaccination remains the most effective preventative. Rapid mutation of hemagglutinin allows viruses to escape adaptive immunity. This antigenic drift necessitates regular vaccine updates. Effective vaccine strains need to represent H3N2 populations ci...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.60067
更新日期:2020-09-02 00:00:00
abstract::It is now clear that microglia and macrophages are present in brain tumors, but whether or how they affect initiation and development of tumors is not known. Exploiting the advantages of the zebrafish (Danio rerio) model, we showed that macrophages and microglia respond immediately upon oncogene activation in the brai...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.31918
更新日期:2018-02-21 00:00:00
abstract::A major challenge in neuroscience is to longitudinally monitor whole brain activity across multiple spatial scales in the same animal. Functional UltraSound (fUS) is an emerging technology that offers images of cerebral blood volume over large brain portions. Here we show for the first time its capability to resolve t...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.35028
更新日期:2018-06-28 00:00:00
abstract::Many postdoctoral researchers apply for faculty positions knowing relatively little about the hiring process or what is needed to secure a job offer. To address this lack of knowledge about the hiring process we conducted a survey of applicants for faculty positions: the survey ran between May 2018 and May 2019, and r...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.54097
更新日期:2020-06-12 00:00:00
abstract::Generating recombinant monoclonal antibodies (R-mAbs) from mAb-producing hybridomas offers numerous advantages that increase the effectiveness, reproducibility, and transparent reporting of research. We report here the generation of a novel resource in the form of a library of recombinant R-mAbs validated for neurosci...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.43322
更新日期:2019-01-22 00:00:00
abstract::Aging is an intricate phenomenon associated with the gradual loss of physiological functions, and both nutrient sensing and proteostasis control lifespan. Although multiple approaches have facilitated the identification of candidate genes that govern longevity, the molecular mechanisms that link aging pathways are sti...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.39925
更新日期:2018-12-05 00:00:00
abstract::Mature microRNAs (miRNAs) are processed from primary transcripts (pri-miRNAs), and their expression is controlled at transcriptional and post-transcriptional levels. However, how regulation at multiple levels achieves precise control remains elusive. Using published and new datasets, we profile a time course of mature...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.38389
更新日期:2018-07-19 00:00:00
abstract::Negative regulators of adult neurogenesis are of particular interest as targets to enhance neuronal repair, but few have yet been identified. Planarians can regenerate their entire CNS using pluripotent adult stem cells, and this process is robustly regulated to ensure that new neurons are produced in proper abundance...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.47293
更新日期:2020-01-20 00:00:00
abstract::Early life adversity (ELA) is associated with increased risk for stress-related disorders later in life. The link between ELA and risk for psychopathology is well established but the developmental mechanisms remain unclear. Using a mouse model of resource insecurity, limited bedding (LB), we tested the effects of LB o...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.55263
更新日期:2020-07-21 00:00:00
abstract::Phosphorylation of eIF2α controls translation initiation by restricting the levels of active eIF2-GTP/Met-tRNAi ternary complexes (TC). This modulates the expression of all eukaryotic mRNAs and contributes to the cellular integrated stress response. Key to controlling the activity of eIF2 are translation factors eIF2B...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.24542
更新日期:2017-03-18 00:00:00