Differential requirements for cyclase-associated protein (CAP) in actin-dependent processes of Toxoplasma gondii.

Abstract:

:Toxoplasma gondii contains a limited subset of actin binding proteins. Here we show that the putative actin regulator cyclase-associated protein (CAP) is present in two different isoforms and its deletion leads to significant defects in some but not all actin dependent processes. We observe defects in cell-cell communication, daughter cell orientation and the juxtanuclear accumulation of actin, but only modest defects in synchronicity of division and no defect in the replication of the apicoplast. 3D electron microscopy reveals that loss of CAP results in a defect in formation of a normal central residual body, but parasites remain connected within the vacuole. This dissociates synchronicity of division and parasite rosetting and reveals that establishment and maintenance of the residual body may be more complex than previously thought. These results highlight the different spatial requirements for F-actin regulation in Toxoplasma which appear to be achieved by partially overlapping functions of actin regulators.

journal_name

Elife

journal_title

eLife

authors

Hunt A,Russell MRG,Wagener J,Kent R,Carmeille R,Peddie CJ,Collinson L,Heaslip A,Ward GE,Treeck M

doi

10.7554/eLife.50598

subject

Has Abstract

pub_date

2019-10-02 00:00:00

issn

2050-084X

pii

50598

journal_volume

8

pub_type

杂志文章

相关文献

eLife文献大全
  • Cryo-EM structure of VASH1-SVBP bound to microtubules.

    abstract::The dynamic tyrosination-detyrosination cycle of α-tubulin regulates microtubule functions. Perturbation of this cycle impairs mitosis, neural physiology, and cardiomyocyte contraction. The carboxypeptidases vasohibins 1 and 2 (VASH1 and VASH2), in complex with the small vasohibin-binding protein (SVBP), mediate α-tub...

    journal_title:eLife

    pub_type: 杂志文章

    doi:10.7554/eLife.58157

    authors: Li F,Li Y,Ye X,Gao H,Shi Z,Luo X,Rice LM,Yu H

    更新日期:2020-08-10 00:00:00

  • Reliable cell cycle commitment in budding yeast is ensured by signal integration.

    abstract::Cell fate decisions are critical for life, yet little is known about how their reliability is achieved when signals are noisy and fluctuating with time. In this study, we show that in budding yeast, the decision of cell cycle commitment (Start) is determined by the time integration of its triggering signal Cln3. We fu...

    journal_title:eLife

    pub_type: 杂志文章

    doi:10.7554/eLife.03977

    authors: Liu X,Wang X,Yang X,Liu S,Jiang L,Qu Y,Hu L,Ouyang Q,Tang C

    更新日期:2015-01-14 00:00:00

  • An adjunctive therapy administered with an antibiotic prevents enrichment of antibiotic-resistant clones of a colonizing opportunistic pathogen.

    abstract::A key challenge in antibiotic stewardship is figuring out how to use antibiotics therapeutically without promoting the evolution of antibiotic resistance. Here, we demonstrate proof of concept for an adjunctive therapy that allows intravenous antibiotic treatment without driving the evolution and onward transmission o...

    journal_title:eLife

    pub_type: 杂志文章

    doi:10.7554/eLife.58147

    authors: Morley VJ,Kinnear CL,Sim DG,Olson SN,Jackson LM,Hansen E,Usher GA,Showalter SA,Pai MP,Woods RJ,Read AF

    更新日期:2020-12-01 00:00:00

  • Systemic hypoxia inhibits T cell response by limiting mitobiogenesis via matrix substrate-level phosphorylation arrest.

    abstract::Systemic oxygen restriction (SOR) is prevalent in numerous clinical conditions, including chronic obstructive pulmonary disease (COPD), and is associated with increased susceptibility to viral infections. However, the influence of SOR on T cell immunity remains uncharacterized. Here we show the detrimental effect of h...

    journal_title:eLife

    pub_type: 杂志文章

    doi:10.7554/eLife.56612

    authors: Saragovi A,Abramovich I,Omar I,Arbib E,Toker O,Gottlieb E,Berger M

    更新日期:2020-11-23 00:00:00

  • Global DNA methylation remodeling during direct reprogramming of fibroblasts to neurons.

    abstract::Direct reprogramming of fibroblasts to neurons induces widespread cellular and transcriptional reconfiguration. Here, we characterized global epigenomic changes during the direct reprogramming of mouse fibroblasts to neurons using whole-genome base-resolution DNA methylation (mC) sequencing. We found that the pioneer ...

    journal_title:eLife

    pub_type: 杂志文章

    doi:10.7554/eLife.40197

    authors: Luo C,Lee QY,Wapinski O,Castanon R,Nery JR,Mall M,Kareta MS,Cullen SM,Goodell MA,Chang HY,Wernig M,Ecker JR

    更新日期:2019-01-15 00:00:00

  • TORC2-dependent protein kinase Ypk1 phosphorylates ceramide synthase to stimulate synthesis of complex sphingolipids.

    abstract::Plasma membrane lipid composition must be maintained during growth and under environmental insult. In yeast, signaling mediated by TOR Complex 2 (TORC2)-dependent protein kinase Ypk1 controls lipid abundance and distribution in response to membrane stress. Ypk1, among other actions, alleviates negative regulation of L...

    journal_title:eLife

    pub_type: 杂志文章

    doi:10.7554/eLife.03779

    authors: Muir A,Ramachandran S,Roelants FM,Timmons G,Thorner J

    更新日期:2014-10-03 00:00:00

  • Different dendritic domains of the GnRH neuron underlie the pulse and surge modes of GnRH secretion in female mice.

    abstract::The gonadotropin-releasing hormone (GnRH) neurons exhibit pulse and surge modes of activity to control fertility. They also exhibit an unusual bipolar morphology comprised of a classical soma-proximal dendritic zone and an elongated secretory process that can operate as both a dendrite and an axon, termed a 'dendron'....

    journal_title:eLife

    pub_type: 杂志文章

    doi:10.7554/eLife.53945

    authors: Wang L,Guo W,Shen X,Yeo S,Long H,Wang Z,Lyu Q,Herbison AE,Kuang Y

    更新日期:2020-07-09 00:00:00

  • Cellular aspect ratio and cell division mechanics underlie the patterning of cell progeny in diverse mammalian epithelia.

    abstract::Cell division is essential to expand, shape, and replenish epithelia. In the adult small intestine, cells from a common progenitor intermix with other lineages, whereas cell progeny in many other epithelia form contiguous patches. The mechanisms that generate these distinct patterns of progeny are poorly understood. U...

    journal_title:eLife

    pub_type: 杂志文章

    doi:10.7554/eLife.36739

    authors: McKinley KL,Stuurman N,Royer LA,Schartner C,Castillo-Azofeifa D,Delling M,Klein OD,Vale RD

    更新日期:2018-06-13 00:00:00

  • Multiple selection filters ensure accurate tail-anchored membrane protein targeting.

    abstract::Accurate protein localization is crucial to generate and maintain organization in all cells. Achieving accuracy is challenging, as the molecular signals that dictate a protein's cellular destination are often promiscuous. A salient example is the targeting of an essential class of tail-anchored (TA) proteins, whose so...

    journal_title:eLife

    pub_type: 杂志文章

    doi:10.7554/eLife.21301

    authors: Rao M,Okreglak V,Chio US,Cho H,Walter P,Shan SO

    更新日期:2016-12-07 00:00:00

  • Identification of a molecular basis for the juvenile sleep state.

    abstract::Across species, sleep in young animals is critical for normal brain maturation. The molecular determinants of early life sleep remain unknown. Through an RNAi-based screen, we identified a gene, pdm3, required for sleep maturation in Drosophila. Pdm3, a transcription factor, coordinates an early developmental program ...

    journal_title:eLife

    pub_type: 杂志文章

    doi:10.7554/eLife.52676

    authors: Chakravarti Dilley L,Szuperak M,Gong NN,Williams CE,Saldana RL,Garbe DS,Syed MH,Jain R,Kayser MS

    更新日期:2020-03-23 00:00:00

  • LEAFY maintains apical stem cell activity during shoot development in the fern Ceratopteris richardii.

    abstract::During land plant evolution, determinate spore-bearing axes (retained in extant bryophytes such as mosses) were progressively transformed into indeterminate branching shoots with specialized reproductive axes that form flowers. The LEAFY transcription factor, which is required for the first zygotic cell division in mo...

    journal_title:eLife

    pub_type: 杂志文章

    doi:10.7554/eLife.39625

    authors: Plackett AR,Conway SJ,Hewett Hazelton KD,Rabbinowitsch EH,Langdale JA,Di Stilio VS

    更新日期:2018-10-24 00:00:00

  • Local and global influences on protein turnover in neurons and glia.

    abstract::Regulation of protein turnover allows cells to react to their environment and maintain homeostasis. Proteins can show different turnover rates in different tissue, but little is known about protein turnover in different brain cell types. We used dynamic SILAC to determine half-lives of over 5100 proteins in rat primar...

    journal_title:eLife

    pub_type: 杂志文章

    doi:10.7554/eLife.34202

    authors: Dörrbaum AR,Kochen L,Langer JD,Schuman EM

    更新日期:2018-06-19 00:00:00

  • Enterococcus faecium secreted antigen A generates muropeptides to enhance host immunity and limit bacterial pathogenesis.

    abstract::We discovered that Enterococcus faecium (E. faecium), a ubiquitous commensal bacterium, and its secreted peptidoglycan hydrolase (SagA) were sufficient to enhance intestinal barrier function and pathogen tolerance, but the precise biochemical mechanism was unknown. Here we show E. faecium has unique peptidoglycan comp...

    journal_title:eLife

    pub_type: 杂志文章

    doi:10.7554/eLife.45343

    authors: Kim B,Wang YC,Hespen CW,Espinosa J,Salje J,Rangan KJ,Oren DA,Kang JY,Pedicord VA,Hang HC

    更新日期:2019-04-10 00:00:00

  • Large, long range tensile forces drive convergence during Xenopus blastopore closure and body axis elongation.

    abstract::Indirect evidence suggests that blastopore closure during gastrulation of anamniotes, including amphibians such as Xenopus laevis, depends on circumblastoporal convergence forces generated by the marginal zone (MZ), but direct evidence is lacking. We show that explanted MZs generate tensile convergence forces up to 1....

    journal_title:eLife

    pub_type: 杂志文章

    doi:10.7554/eLife.26944

    authors: Shook DR,Kasprowicz EM,Davidson LA,Keller R

    更新日期:2018-03-13 00:00:00

  • Diminished responses to bodily threat and blunted interoception in suicide attempters.

    abstract::Psychological theories of suicide suggest that certain traits may reduce aversion to physical threat and increase the probability of transitioning from suicidal ideation to action. Here, we investigated whether blunted sensitivity to bodily signals is associated with suicidal action by comparing individuals with a his...

    journal_title:eLife

    pub_type: 杂志文章

    doi:10.7554/eLife.51593

    authors: DeVille DC,Kuplicki R,Stewart JL,Tulsa 1000 Investigators.,Paulus MP,Khalsa SS

    更新日期:2020-04-07 00:00:00

  • Genome rearrangements and pervasive meiotic drive cause hybrid infertility in fission yeast.

    abstract::Hybrid sterility is one of the earliest postzygotic isolating mechanisms to evolve between two recently diverged species. Here we identify causes underlying hybrid infertility of two recently diverged fission yeast species Schizosaccharomyces pombe and S. kambucha, which mate to form viable hybrid diploids that effici...

    journal_title:eLife

    pub_type: 杂志文章

    doi:10.7554/eLife.02630

    authors: Zanders SE,Eickbush MT,Yu JS,Kang JW,Fowler KR,Smith GR,Malik HS

    更新日期:2014-06-24 00:00:00

  • FBXL19 recruits CDK-Mediator to CpG islands of developmental genes priming them for activation during lineage commitment.

    abstract::CpG islands are gene regulatory elements associated with the majority of mammalian promoters, yet how they regulate gene expression remains poorly understood. Here, we identify FBXL19 as a CpG island-binding protein in mouse embryonic stem (ES) cells and show that it associates with the CDK-Mediator complex. We discov...

    journal_title:eLife

    pub_type: 杂志文章

    doi:10.7554/eLife.37084

    authors: Dimitrova E,Kondo T,Feldmann A,Nakayama M,Koseki Y,Konietzny R,Kessler BM,Koseki H,Klose RJ

    更新日期:2018-05-29 00:00:00

  • Cryo-EM visualization of the ribosome in termination complex with apo-RF3 and RF1.

    abstract::Termination of messenger RNA translation in Bacteria and Archaea is initiated by release factors (RFs) 1 or 2 recognizing a stop codon in the ribosomal A site and releasing the peptide from the P-site transfer RNA. After release, RF-dissociation is facilitated by the G-protein RF3. Structures of ribosomal complexes wi...

    journal_title:eLife

    pub_type: 杂志文章

    doi:10.7554/eLife.00411

    authors: Pallesen J,Hashem Y,Korkmaz G,Koripella RK,Huang C,Ehrenberg M,Sanyal S,Frank J

    更新日期:2013-06-04 00:00:00

  • BAD and KATP channels regulate neuron excitability and epileptiform activity.

    abstract::Brain metabolism can profoundly influence neuronal excitability. Mice with genetic deletion or alteration of Bad (BCL-2 agonist of cell death) exhibit altered brain-cell fuel metabolism, accompanied by resistance to acutely induced epileptic seizures; this seizure protection is mediated by ATP-sensitive potassium (KAT...

    journal_title:eLife

    pub_type: 杂志文章

    doi:10.7554/eLife.32721

    authors: Martínez-François JR,Fernández-Agüera MC,Nathwani N,Lahmann C,Burnham VL,Danial NN,Yellen G

    更新日期:2018-01-25 00:00:00

  • Gi/o protein-coupled receptors in dopamine neurons inhibit the sodium leak channel NALCN.

    abstract::Dopamine (D2) receptors provide autoinhibitory feedback onto dopamine neurons through well-known interactions with voltage-gated calcium channels and G protein-coupled inwardly-rectifying potassium (GIRK) channels. Here, we reveal a third major effector involved in D2R modulation of dopaminergic neurons - the sodium l...

    journal_title:eLife

    pub_type: 杂志文章

    doi:10.7554/eLife.40984

    authors: Philippart F,Khaliq ZM

    更新日期:2018-12-17 00:00:00

  • Identification of an inhibitory neuron subtype, the L-stellate cell of the cochlear nucleus.

    abstract::Auditory processing depends upon inhibitory signaling by interneurons, even at its earliest stages in the ventral cochlear nucleus (VCN). Remarkably, to date only a single subtype of inhibitory neuron has been documented in the VCN, a projection neuron termed the D-stellate cell. With the use of a transgenic mouse lin...

    journal_title:eLife

    pub_type: 杂志文章

    doi:10.7554/eLife.54350

    authors: Ngodup T,Romero GE,Trussell LO

    更新日期:2020-11-03 00:00:00

  • Changes of mitochondrial ultrastructure and function during ageing in mice and Drosophila.

    abstract::Ageing is a progressive decline of intrinsic physiological functions. We examined the impact of ageing on the ultrastructure and function of mitochondria in mouse and fruit flies (Drosophila melanogaster) by electron cryo-tomography and respirometry. We discovered distinct age-related changes in both model organisms. ...

    journal_title:eLife

    pub_type: 杂志文章

    doi:10.7554/eLife.24662

    authors: Brandt T,Mourier A,Tain LS,Partridge L,Larsson NG,Kühlbrandt W

    更新日期:2017-07-12 00:00:00

  • Noroviruses subvert the core stress granule component G3BP1 to promote viral VPg-dependent translation.

    abstract::Knowledge of the host factors required for norovirus replication has been hindered by the challenges associated with culturing human noroviruses. We have combined proteomic analysis of the viral translation and replication complexes with a CRISPR screen, to identify host factors required for norovirus infection. The c...

    journal_title:eLife

    pub_type: 杂志文章

    doi:10.7554/eLife.46681

    authors: Hosmillo M,Lu J,McAllaster MR,Eaglesham JB,Wang X,Emmott E,Domingues P,Chaudhry Y,Fitzmaurice TJ,Tung MK,Panas MD,McInerney G,Locker N,Wilen CB,Goodfellow IG

    更新日期:2019-08-12 00:00:00

  • Receptive field center-surround interactions mediate context-dependent spatial contrast encoding in the retina.

    abstract::Antagonistic receptive field surrounds are a near-universal property of early sensory processing. A key assumption in many models for retinal ganglion cell encoding is that receptive field surrounds are added only to the fully formed center signal. But anatomical and functional observations indicate that surrounds are...

    journal_title:eLife

    pub_type: 杂志文章

    doi:10.7554/eLife.38841

    authors: Turner MH,Schwartz GW,Rieke F

    更新日期:2018-09-06 00:00:00

  • Adaptation in protein fitness landscapes is facilitated by indirect paths.

    abstract::The structure of fitness landscapes is critical for understanding adaptive protein evolution. Previous empirical studies on fitness landscapes were confined to either the neighborhood around the wild type sequence, involving mostly single and double mutants, or a combinatorially complete subgraph involving only two am...

    journal_title:eLife

    pub_type: 杂志文章

    doi:10.7554/eLife.16965

    authors: Wu NC,Dai L,Olson CA,Lloyd-Smith JO,Sun R

    更新日期:2016-07-08 00:00:00

  • Secretagogin expression delineates functionally-specialized populations of striatal parvalbumin-containing interneurons.

    abstract::Corticostriatal afferents can engage parvalbumin-expressing (PV+) interneurons to rapidly curtail the activity of striatal projection neurons (SPNs), thus shaping striatal output. Schemes of basal ganglia circuit dynamics generally consider striatal PV+ interneurons to be homogenous, despite considerable heterogeneity...

    journal_title:eLife

    pub_type: 杂志文章

    doi:10.7554/eLife.16088

    authors: Garas FN,Shah RS,Kormann E,Doig NM,Vinciati F,Nakamura KC,Dorst MC,Smith Y,Magill PJ,Sharott A

    更新日期:2016-09-26 00:00:00

  • Epigenomic landscapes of retinal rods and cones.

    abstract::Rod and cone photoreceptors are highly similar in many respects but they have important functional and molecular differences. Here, we investigate genome-wide patterns of DNA methylation and chromatin accessibility in mouse rods and cones and correlate differences in these features with gene expression, histone marks,...

    journal_title:eLife

    pub_type: 杂志文章

    doi:10.7554/eLife.11613

    authors: Mo A,Luo C,Davis FP,Mukamel EA,Henry GL,Nery JR,Urich MA,Picard S,Lister R,Eddy SR,Beer MA,Ecker JR,Nathans J

    更新日期:2016-03-07 00:00:00

  • Multiplexed imaging of immune cells in staged multiple sclerosis lesions by mass cytometry.

    abstract::Multiple sclerosis (MS) is characterized by demyelinated and inflammatory lesions in the brain and spinal cord that are highly variable in terms of cellular content. Here, we used imaging mass cytometry (IMC) to enable the simultaneous imaging of 15+ proteins within staged MS lesions. To test the potential for IMC to ...

    journal_title:eLife

    pub_type: 杂志文章

    doi:10.7554/eLife.48051

    authors: Ramaglia V,Sheikh-Mohamed S,Legg K,Park C,Rojas OL,Zandee S,Fu F,Ornatsky O,Swanson EC,Pitt D,Prat A,McKee TD,Gommerman JL

    更新日期:2019-08-01 00:00:00

  • Rat anterior cingulate cortex recalls features of remote reward locations after disfavoured reinforcements.

    abstract::The anterior cingulate cortex (ACC) encodes information supporting mnemonic and cognitive processes. We show here that a rat's position can be decoded with high spatiotemporal resolution from ACC activity. ACC neurons encoded the current state of the animal and task, except for brief excursions that sometimes occurred...

    journal_title:eLife

    pub_type: 杂志文章

    doi:10.7554/eLife.29793

    authors: Mashhoori A,Hashemnia S,McNaughton BL,Euston DR,Gruber AJ

    更新日期:2018-04-17 00:00:00

  • 3.3-Å resolution cryo-EM structure of human ribonucleotide reductase with substrate and allosteric regulators bound.

    abstract::Ribonucleotide reductases (RNRs) convert ribonucleotides into deoxyribonucleotides, a reaction essential for DNA replication and repair. Human RNR requires two subunits for activity, the α subunit contains the active site, and the β subunit houses the radical cofactor. Here, we present a 3.3-Å resolution structure by ...

    journal_title:eLife

    pub_type: 杂志文章

    doi:10.7554/eLife.31502

    authors: Brignole EJ,Tsai KL,Chittuluru J,Li H,Aye Y,Penczek PA,Stubbe J,Drennan CL,Asturias F

    更新日期:2018-02-20 00:00:00