Pattern-formation mechanisms in motility mutants of Myxococcus xanthus.

Abstract:

:Formation of spatial patterns of cells is a recurring theme in biology and often depends on regulated cell motility. Motility of the rod-shaped cells of the bacterium Myxococcus xanthus depends on two motility machineries, type IV pili (giving rise to S-motility) and the gliding motility apparatus (giving rise to A-motility). Cell motility is regulated by occasional reversals. Moving M. xanthus cells can organize into spreading colonies or spore-filled fruiting bodies, depending on their nutritional status. To ultimately understand these two pattern-formation processes and the contributions by the two motility machineries, as well as the cell reversal machinery, we analyse spatial self-organization in three M. xanthus strains: (i) a mutant that moves unidirectionally without reversing by the A-motility system only, (ii) a unidirectional mutant that is also equipped with the S-motility system, and (iii) the wild-type that, in addition to the two motility systems, occasionally reverses its direction of movement. The mutant moving by means of the A-engine illustrates that collective motion in the form of large moving clusters can arise in gliding bacteria owing to steric interactions of the rod-shaped cells, without the need of invoking any biochemical signal regulation. The two-engine strain mutant reveals that the same phenomenon emerges when both motility systems are present, and as long as cells exhibit unidirectional motion only. From the study of these two strains, we conclude that unidirectional cell motion induces the formation of large moving clusters at low and intermediate densities, while it results in vortex formation at very high densities. These findings are consistent with what is known from self-propelled rod models, which strongly suggests that the combined effect of self-propulsion and volume exclusion interactions is the pattern-formation mechanism leading to the observed phenomena. On the other hand, we learn that when cells occasionally reverse their moving direction, as observed in the wild-type, cells form small but strongly elongated clusters and self-organize into a mesh-like structure at high enough densities. These results have been obtained from a careful analysis of the cluster statistics of ensembles of cells, and analysed in the light of a coagulation Smoluchowski equation with fragmentation.

journal_name

Interface Focus

journal_title

Interface focus

authors

Starruß J,Peruani F,Jakovljevic V,Søgaard-Andersen L,Deutsch A,Bär M

doi

10.1098/rsfs.2012.0034

subject

Has Abstract

pub_date

2012-12-06 00:00:00

pages

774-85

issue

6

eissn

2042-8898

issn

2042-8901

pii

rsfs20120034

journal_volume

2

pub_type

杂志文章
  • Can biofuels be a solution to climate change? The implications of land use change-related emissions for policy.

    abstract::Biofuels have gained increasing attention as an alternative to fossil fuels for several reasons, one of which is their potential to reduce the greenhouse gas (GHG) emissions from the transportation sector. Recent studies have questioned the validity of claims about the potential of biofuels to reduce GHG emissions rel...

    journal_title:Interface focus

    pub_type: 杂志文章

    doi:10.1098/rsfs.2010.0016

    authors: Khanna M,Crago CL,Black M

    更新日期:2011-04-06 00:00:00

  • Flexible composition and execution of high performance, high fidelity multiscale biomedical simulations.

    abstract::Multiscale simulations are essential in the biomedical domain to accurately model human physiology. We present a modular approach for designing, constructing and executing multiscale simulations on a wide range of resources, from laptops to petascale supercomputers, including combinations of these. Our work features t...

    journal_title:Interface focus

    pub_type: 杂志文章

    doi:10.1098/rsfs.2012.0087

    authors: Groen D,Borgdorff J,Bona-Casas C,Hetherington J,Nash RW,Zasada SJ,Saverchenko I,Mamonski M,Kurowski K,Bernabeu MO,Hoekstra AG,Coveney PV

    更新日期:2013-04-06 00:00:00

  • A tool for multi-scale modelling of the renal nephron.

    abstract::We present the development of a tool, which provides users with the ability to visualize and interact with a comprehensive description of a multi-scale model of the renal nephron. A one-dimensional anatomical model of the nephron has been created and is used for visualization and modelling of tubule transport in vario...

    journal_title:Interface focus

    pub_type: 杂志文章

    doi:10.1098/rsfs.2010.0032

    authors: Nickerson DP,Terkildsen JR,Hamilton KL,Hunter PJ

    更新日期:2011-06-06 00:00:00

  • Features of owl wings that promote silent flight.

    abstract::Owls are an order of birds of prey that are known for the development of a silent flight. We review here the morphological adaptations of owls leading to silent flight and discuss also aerodynamic properties of owl wings. We start with early observations (until 2005), and then turn to recent advances. The large wings ...

    journal_title:Interface focus

    pub_type: 杂志文章,评审

    doi:10.1098/rsfs.2016.0078

    authors: Wagner H,Weger M,Klaas M,Schröder W

    更新日期:2017-02-06 00:00:00

  • The morphological state space revisited: what do phylogenetic patterns in homoplasy tell us about the number of possible character states?

    abstract::Biological variety and major evolutionary transitions suggest that the space of possible morphologies may have varied among lineages and through time. However, most models of phylogenetic character evolution assume that the potential state space is finite. Here, I explore what the morphological state space might be li...

    journal_title:Interface focus

    pub_type: 杂志文章

    doi:10.1098/rsfs.2015.0049

    authors: Hoyal Cuthill JF

    更新日期:2015-12-06 00:00:00

  • Climate change mitigation as a co-benefit of regenerative ranching: insights from Australia and the United States.

    abstract::'Managed grazing' is gaining attention for its potential to contribute to climate change mitigation by reducing bare ground and promoting perennialization, thereby enhancing soil carbon sequestration (SCS). Understanding why ranchers adopt managed grazing is key to developing the right incentives. In this paper, we ex...

    journal_title:Interface focus

    pub_type: 杂志文章

    doi:10.1098/rsfs.2020.0027

    authors: Gosnell H,Charnley S,Stanley P

    更新日期:2020-10-06 00:00:00

  • How linear features alter predator movement and the functional response.

    abstract::In areas of oil and gas exploration, seismic lines have been reported to alter the movement patterns of wolves (Canis lupus). We developed a mechanistic first passage time model, based on an anisotropic elliptic partial differential equation, and used this to explore how wolf movement responses to seismic lines influe...

    journal_title:Interface focus

    pub_type: 杂志文章

    doi:10.1098/rsfs.2011.0086

    authors: McKenzie HW,Merrill EH,Spiteri RJ,Lewis MA

    更新日期:2012-04-06 00:00:00

  • Bioadhesion in ascidians: a developmental and functional genomics perspective.

    abstract::The development of bioadhesives inspired from marine animals is a promising approach to generate new tissue-compatible medical components. A number of marine species, through their adhesive properties, also represent significant foulers that become increasingly problematic to aquaculture, shipping or local biodiversit...

    journal_title:Interface focus

    pub_type: 杂志文章,评审

    doi:10.1098/rsfs.2014.0061

    authors: Pennati R,Rothbächer U

    更新日期:2015-02-06 00:00:00

  • Antenatal architecture and activity of the human heart.

    abstract::We construct the components for a family of computational models of the electrophysiology of the human foetal heart from 60 days gestational age (DGA) to full term. This requires both cell excitation models that reconstruct the myocyte action potentials, and datasets of cardiac geometry and architecture. Fast low-angl...

    journal_title:Interface focus

    pub_type: 杂志文章

    doi:10.1098/rsfs.2012.0065

    authors: Pervolaraki E,Anderson RA,Benson AP,Hayes-Gill B,Holden AV,Moore BJ,Paley MN,Zhang H

    更新日期:2013-04-06 00:00:00

  • The mathematician's control toolbox for management of type 1 diabetes.

    abstract::Blood glucose levels are controlled by well-known physiological feedback loops: high glucose levels promote insulin release from the pancreas, which in turn stimulates cellular glucose uptake. Low blood glucose levels promote pancreatic glucagon release, stimulating glycogen breakdown to glucose in the liver. In healt...

    journal_title:Interface focus

    pub_type: 杂志文章,评审

    doi:10.1098/rsfs.2014.0042

    authors: Csete M,Doyle J

    更新日期:2014-10-06 00:00:00

  • Nonulosonic acids contribute to the pathogenicity of the oral bacterium Tannerella forsythia.

    abstract::Periodontitis is a polymicrobial, biofilm-caused, inflammatory disease affecting the tooth-supporting tissues. It is not only the leading cause of tooth loss worldwide, but can also impact systemic health. The development of effective treatment strategies is hampered by the complicated disease pathogenesis which is be...

    journal_title:Interface focus

    pub_type: 杂志文章,评审

    doi:10.1098/rsfs.2018.0064

    authors: Bloch S,Tomek MB,Friedrich V,Messner P,Schäffer C

    更新日期:2019-04-06 00:00:00

  • Exocytosis from pancreatic β-cells: mathematical modelling of the exit of low-molecular-weight granule content.

    abstract::Pancreatic β-cells use Ca(2+)-dependent exocytosis of large dense core vesicles to release insulin. Exocytosis in β-cells has been studied biochemically, biophysically and optically. We have previously developed a biophysical method to monitor release of endogenous intragranular constituents that are co-released with ...

    journal_title:Interface focus

    pub_type: 杂志文章

    doi:10.1098/rsfs.2010.0006

    authors: Galvanovskis J,Braun M,Rorsman P

    更新日期:2011-02-06 00:00:00

  • The effect of graphene-poly(methyl methacrylate) fibres on microbial growth.

    abstract::A novel class of ultra-thin fibres, which affect microbial growth, were explored. The microbial properties of poly(methyl methacrylate) fibres containing 2, 4 and 8 wt% of graphene nanoplatelets (GNPs) were studied. GNPs were dispersed in a polymeric solution and processed using pressurized gyration. Electron microsco...

    journal_title:Interface focus

    pub_type: 杂志文章

    doi:10.1098/rsfs.2017.0058

    authors: Matharu RK,Porwal H,Ciric L,Edirisinghe M

    更新日期:2018-06-06 00:00:00

  • Self-assembly of nucleopeptides to interact with DNAs.

    abstract::As a novel class of biomaterials, nucleopeptides, via the conjugation of nucleobases and peptides, usually self-assemble to form nanofibres driven mainly by hydrogen bonds. Containing nucleobase(s), nucleopeptides have a unique property-interacting with nucleic acids. Here we report the design and characterization of ...

    journal_title:Interface focus

    pub_type: 杂志文章

    doi:10.1098/rsfs.2016.0116

    authors: Du X,Zhou J,Li X,Xu B

    更新日期:2017-12-06 00:00:00

  • Survival dynamical systems: individual-level survival analysis from population-level epidemic models.

    abstract::In this paper, we show that solutions to ordinary differential equations describing the large-population limits of Markovian stochastic epidemic models can be interpreted as survival or cumulative hazard functions when analysing data on individuals sampled from the population. We refer to the individual-level survival...

    journal_title:Interface focus

    pub_type: 杂志文章

    doi:10.1098/rsfs.2019.0048

    authors: KhudaBukhsh WR,Choi B,Kenah E,Rempała GA

    更新日期:2020-02-06 00:00:00

  • Modelling cavitation erosion using fluid-material interaction simulations.

    abstract::Material deformation and pitting from cavitation bubble collapse is investigated using fluid and material dynamics and their interaction. In the fluid, a novel hybrid approach, which links a boundary element method and a compressible finite difference method, is used to capture non-spherical bubble dynamics and result...

    journal_title:Interface focus

    pub_type: 杂志文章

    doi:10.1098/rsfs.2015.0016

    authors: Chahine GL,Hsiao CT

    更新日期:2015-10-06 00:00:00

  • Purely entropic self-assembly of the bicontinuous Ia3d gyroid phase in equilibrium hard-pear systems.

    abstract::We investigate a model of hard pear-shaped particles which forms the bicontinuous Ia[Formula: see text]d structure by entropic self-assembly, extending the previous observations of Barmes et al. (2003 Phys. Rev. E68, 021708. (doi:10.1103/PhysRevE.68.021708)) and Ellison et al. (2006 Phys. Rev. Lett.97, 237801. (doi:10...

    journal_title:Interface focus

    pub_type: 杂志文章

    doi:10.1098/rsfs.2016.0161

    authors: Schönhöfer PWA,Ellison LJ,Marechal M,Cleaver DJ,Schröder-Turk GE

    更新日期:2017-08-06 00:00:00

  • Mutagenesis computer experiments in pentameric ligand-gated ion channels: the role of simulation tools with different resolution.

    abstract::Pentameric ligand-gated ion channels (pLGICs) are an important class of widely expressed membrane neuroreceptors, which play a crucial role in fast synaptic communications and are involved in several neurological conditions. They are activated by the binding of neurotransmitters, which trigger the transmission of an e...

    journal_title:Interface focus

    pub_type: 杂志文章,评审

    doi:10.1098/rsfs.2018.0067

    authors: Crnjar A,Comitani F,Melis C,Molteni C

    更新日期:2019-06-06 00:00:00

  • Joining or opting out of a Lotka-Volterra game between predators and prey: does the best strategy depend on modelling energy lost and gained?

    abstract::Apart from interacting, prey and predators may also avoid each other by moving into refuges where they lack food, yet survive by switching to an energy-saving physiological state. Lotka-Volterra models of predator-prey interactions ignore this option. Therefore, we have modelled this game of 'joining versus opting out...

    journal_title:Interface focus

    pub_type: 杂志文章

    doi:10.1098/rsfs.2013.0034

    authors: Staňková K,Abate A,Sabelis MW,Buša J,You L

    更新日期:2013-12-06 00:00:00

  • The logic of ecological patchiness.

    abstract::Most ecological interactions occur in environments that are spatially and temporally heterogeneous-'patchy'-across a wide range of scales. In contrast, most theoretical models of ecological interactions, especially large-scale models applied to societal issues such as climate change, resource management and human heal...

    journal_title:Interface focus

    pub_type: 杂志文章

    doi:10.1098/rsfs.2011.0084

    authors: Grünbaum D

    更新日期:2012-04-06 00:00:00

  • Mathematical modelling of fluid flow and solute transport to define operating parameters for in vitro perfusion cell culture systems.

    abstract::In recent years, there has been a move away from the use of static in vitro two-dimensional cell culture models for testing the chemical safety and efficacy of drugs. Such models are increasingly being replaced by more physiologically relevant cell culture systems featuring dynamic flow and/or three-dimensional struct...

    journal_title:Interface focus

    pub_type: 杂志文章

    doi:10.1098/rsfs.2019.0045

    authors: Hyndman L,McKee S,Mottram NJ,Singh B,Webb SD,McGinty S

    更新日期:2020-04-06 00:00:00

  • Towards fungal computer.

    abstract::We propose that fungi Basidiomycetes can be used as computing devices: information is represented by spikes of electrical activity, a computation is implemented in a mycelium network and an interface is realized via fruit bodies. In a series of scoping experiments, we demonstrate that electrical activity recorded on f...

    journal_title:Interface focus

    pub_type: 杂志文章

    doi:10.1098/rsfs.2018.0029

    authors: Adamatzky A

    更新日期:2018-12-06 00:00:00

  • Hierarchical self-assembly of chiral fibres from achiral particles.

    abstract::We investigate, by molecular dynamics simulation, the behaviour of discotic particles in a solvent of Lennard-Jones spheres. When chromonic disc-sphere interactions are imposed on these systems, three regimes of self-assembly are observed. At moderate temperatures, numerous short threads of discs develop, but these th...

    journal_title:Interface focus

    pub_type: 杂志文章

    doi:10.1098/rsfs.2011.0104

    authors: Prybytak P,Frith WJ,Cleaver DJ

    更新日期:2012-10-06 00:00:00

  • Energetics in robotic flight at small scales.

    abstract::Recent advances in design, sensing and control have led to aerial robots that offer great promise in a range of real-world applications. However, one critical open question centres on how to improve the energetic efficiency of aerial robots so that they can be useful in practical situations. This review paper provides...

    journal_title:Interface focus

    pub_type: 杂志文章,评审

    doi:10.1098/rsfs.2016.0088

    authors: Karydis K,Kumar V

    更新日期:2017-02-06 00:00:00

  • Collagen network strengthening following cyclic tensile loading.

    abstract::The bulk mechanical properties of tissues are highly tuned to the physiological loads they experience and reflect the hierarchical structure and mechanical properties of their constituent parts. A thorough understanding of the processes involved in tissue adaptation is required to develop multi-scale computational mod...

    journal_title:Interface focus

    pub_type: 杂志文章

    doi:10.1098/rsfs.2015.0088

    authors: Susilo ME,Paten JA,Sander EA,Nguyen TD,Ruberti JW

    更新日期:2016-02-06 00:00:00

  • Numerical modelling of orthogonal cutting: application to woodworking with a bench plane.

    abstract::A numerical model for orthogonal cutting using the material point method was applied to woodcutting using a bench plane. The cutting process was modelled by accounting for surface energy associated with wood fracture toughness for crack growth parallel to the grain. By using damping to deal with dynamic crack propagat...

    journal_title:Interface focus

    pub_type: 杂志文章

    doi:10.1098/rsfs.2015.0110

    authors: Nairn JA

    更新日期:2016-06-06 00:00:00

  • A model of ionic transport and osmotic volume control in cochlear outer hair cells.

    abstract::A computational model of the outer hair cell (OHC) of the mammalian cochlea is presented. It addresses the way in which movement of ions controls the cell shape and regulates pH. The model takes into account the possible chloride-bicarbonate exchange function of prestin, a protein highly expressed in the plasma membra...

    journal_title:Interface focus

    pub_type: 杂志文章

    doi:10.1098/rsfs.2014.0018

    authors: West T,Ashmore J

    更新日期:2014-12-06 00:00:00

  • A queueing approach to multi-site enzyme kinetics.

    abstract::Multi-site enzymes, defined as where multiple substrate molecules can bind simultaneously to the same enzyme molecule, play a key role in a number of biological networks, with the Escherichia coli protease ClpXP a well-studied example. These enzymes can form a low latency 'waiting line' of substrate to the enzyme's ca...

    journal_title:Interface focus

    pub_type: 杂志文章

    doi:10.1098/rsfs.2013.0077

    authors: Hochendoner P,Ogle C,Mather WH

    更新日期:2014-06-06 00:00:00

  • Computing by molecular self-assembly.

    abstract::The paper reviews two computing models by DNA self-assembly whose proof of principal have recently been experimentally confirmed. The first model incorporates DNA nano-devices and triple crossover DNA molecules to algorithmically arrange non-DNA species. This is achieved by simulating a finite-state automaton with out...

    journal_title:Interface focus

    pub_type: 杂志文章

    doi:10.1098/rsfs.2011.0117

    authors: Jonoska N,Seeman NC

    更新日期:2012-08-06 00:00:00

  • Establishment of maternal blood supply to the placenta: insights into plugging, unplugging and trophoblast behaviour from an agent-based model.

    abstract::The ability of the baby to receive nutrients and oxygen in utero depends on the healthy development of the placenta. For maternal blood to adequately perfuse the placenta, it dramatically alters the arteries in the uterus that supply it with nutrient-rich blood right from the start of pregnancy. Placental cells (troph...

    journal_title:Interface focus

    pub_type: 杂志文章

    doi:10.1098/rsfs.2019.0019

    authors: Saghian R,Bogle G,James JL,Clark AR

    更新日期:2019-10-06 00:00:00