Coupling the dynamics of two actin networks--new views on the mechanics of cell protrusion.

Abstract:

:We study how mechanical forces integrate spatially and temporally with regulatory signals at the leading edge of migrating cells. To probe the dynamics of this system, we developed quantitative fluorescent speckle microscopy, which maps out actin cytoskeleton transport, assembly and disassembly with high spatial resolution. Statistical processing of single speckle properties revealed two kinetically, kinematically and molecularly distinct, yet spatially overlapping, actin arrays at the leading edge of migrating epithelial cells. The first network, referred to as the lamellipodium, polymerizes and depolymerizes 1-2 microm from the edge in an Arp2/3 (actin-related protein 2/3)- and cofilin-dependent fashion. The second network, referred to as the lamella, exhibits Arp2/3-independent polymerization. To elucidate the dynamic relationship between the two networks, we have begun to examine how assembly and flow are temporally modulated with respect to a protrusion event. In control cells we found bursts of protrusion preceding bursts of F-actin assembly. The time lag disappears in cells where Arp2/3-function is impaired. This and other results allowed us to propose a model in which tropomyosin protects lamella filaments from branching and severing, and to conjecture that Arp2/3-mediated lamellipodium assembly is a natural consequence of lamella expansion, but not the initiator of cell protrusion.

journal_name

Biochem Soc Trans

authors

Danuser G

doi

10.1042/BST20051250

keywords:

subject

Has Abstract

pub_date

2005-12-01 00:00:00

pages

1250-3

issue

Pt 6

eissn

0300-5127

issn

1470-8752

pii

BST20051250

journal_volume

33

pub_type

杂志文章
  • Carbohydrate markers of pancreatic cancer.

    abstract::Pancreatic cancer is the fourth most common cause of death from cancer in the world and the sixth in Europe. Pancreatic cancer is more frequent in males than females. Worldwide, following diagnosis of pancreatic cancer, <2% of patients survive for 5 years, 8% survive for 2 years and <50% survive for only approx. 3 mon...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章

    doi:10.1042/BST0390340

    authors: Szajda SD,Waszkiewicz N,Chojnowska S,Zwierz K

    更新日期:2011-01-01 00:00:00

  • The evolutionary dynamics of venom toxins made by insects and other animals.

    abstract::Animal venoms are recognised as unique biological systems in which to study molecular evolution. Venom use has evolved numerous times among the insects, and insects today use venom to capture prey, defend themselves from predators, or to subdue and modulate host responses during parasitism. However, little is known ab...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章

    doi:10.1042/BST20190820

    authors: Walker AA

    更新日期:2020-08-28 00:00:00

  • The role of TOG domains in microtubule plus end dynamics.

    abstract::The XMAP215 (Xenopus microtubule-associated protein 215) and CLASP [CLIP-170 (cytoskeletal linker protein 170) associated protein] microtubule plus end tracking families play central roles in the regulation of interphase microtubule dynamics and the proper formation of mitotic spindle architecture and flux. XMAP215 me...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST0371002

    authors: Slep KC

    更新日期:2009-10-01 00:00:00

  • The RNA- and DNA-targeting CRISPR-Cas immune systems of Pyrococcus furiosus.

    abstract::Using the hyperthermophile Pyrococcus furiosus, we have delineated several key steps in CRISPR (clustered regularly interspaced short palindromic repeats)-Cas (CRISPR-associated) invader defence pathways. P. furiosus has seven transcriptionally active CRISPR loci that together encode a total of 200 crRNAs (CRISPR RNAs...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST20130056

    authors: Terns RM,Terns MP

    更新日期:2013-12-01 00:00:00

  • Tetraspanins in the humoral immune response.

    abstract::The tetraspanins represent a large superfamily of four-transmembrane proteins that are expressed on all nucleated cells. Tetraspanins play a prominent role in the organization of the plasma membrane by co-ordinating the spatial localization of transmembrane proteins and signalling molecules into 'tetraspanin microdoma...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST0390512

    authors: van Spriel AB

    更新日期:2011-04-01 00:00:00

  • Properties and inhibition of the first two enzymes of the non-mevalonate pathway of isoprenoid biosynthesis.

    abstract::Enzymes of the 1-deoxy-D-xylulose 5-phosphate/2-C-methylerythritol 4-phosphate (DOXP/MEP) pathway are targets for new herbicides and antibacterial drugs. Until now, no inhibitors for the DOXP synthase have been known of. We show that one of the breakdown products of the herbicide clomazone affects the DOXP synthase. O...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章

    doi:

    authors: Mueller C,Schwender J,Zeidler J,Lichtenthaler HK

    更新日期:2000-12-01 00:00:00

  • Unravelling chlorophyll catabolism in higher plants.

    abstract::Chlorophyll metabolism is probably the most visible manifestation of life. In spite of this, chlorophyll catabolism has remained something of a mystery until about 10 years ago. At that time, the first non-green tetrapyrrolic chlorophyll breakdown products from higher plants were discovered, and the structure of the f...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/bst0300625

    authors: Kräutler B

    更新日期:2002-08-01 00:00:00

  • Comparative study of the molecular variation between 'central' and 'peripheral' MUPs and significance for behavioural signalling.

    abstract::MUPs (major urinary proteins) play an important role in chemical signalling in rodents and possibly other animals. In the house mouse (Mus musculus domesticus) MUPs in urine and other bodily fluids trigger a range of behavioural responses that are only partially understood. There are at least 21 Mup genes in the C57BL...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST20140082

    authors: Phelan MM,McLean L,Hurst JL,Beynon RJ,Lian LY

    更新日期:2014-08-01 00:00:00

  • Molecular mechanism for inhibition of 3-hydroxy-3-methylglutaryl CoA (HMG-CoA) reductase by rosuvastatin.

    abstract::The statins are inhibitors of 3-hydroxy-3-methylglutaryl CoA (HMG-CoA) reductase (HMG-CoAR), and are utilized to decrease levels of atherogenic lipoproteins in patients with, or who are at high risk of, cardiovascular disease. This study describes the inhibition of a recombinant, catalytic fragment of human HMG-CoAR b...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/bst0310528

    authors: Holdgate GA,Ward WH,McTaggart F

    更新日期:2003-06-01 00:00:00

  • Enzymes of yeast polyphosphate metabolism: structure, enzymology and biological roles.

    abstract::Inorganic polyphosphate (polyP) is found in all living organisms. The known polyP functions in eukaryotes range from osmoregulation and virulence in parasitic protozoa to modulating blood coagulation, inflammation, bone mineralization and cellular signalling in mammals. However mechanisms of regulation and even the id...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST20150213

    authors: Gerasimaitė R,Mayer A

    更新日期:2016-02-01 00:00:00

  • Structure of artificial and natural VE-cadherin-based adherens junctions.

    abstract::In vascular endothelium, adherens junctions between endothelial cells are composed of VE-cadherin (vascular endothelial cadherin), an adhesive receptor that is crucial for the proper assembly of vascular structures and the maintenance of vascular integrity. As a classical cadherin, VE-cadherin links endothelial cells ...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST0360189

    authors: Taveau JC,Dubois M,Le Bihan O,Trépout S,Almagro S,Hewat E,Durmort C,Heyraud S,Gulino-Debrac D,Lambert O

    更新日期:2008-04-01 00:00:00

  • Responses of plants to iron, zinc and copper deficiencies.

    abstract::Iron, copper and zinc are essential metals for cell metabolism. Plants have evolved different schemes to efficiently mobilize low-solubility nutrients such as metals from their environment and to transport them between organs. In this review we highlight the divergences and convergences of the iron, copper and zinc up...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章

    doi:10.1042/bst0300766

    authors: Wintz H,Fox T,Vulpe C

    更新日期:2002-08-01 00:00:00

  • Hierarchical assembly of cell-matrix adhesion complexes.

    abstract::The adhesion of cells to the extracellular matrix is a dynamic process, mediated by a series of cell-surface and matrix-associated molecules that interact with each other in a spatially and temporally regulated manner. These interactions play a major role in tissue formation, cellular migration and the induction of ad...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST0320416

    authors: Zaidel-Bar R,Cohen M,Addadi L,Geiger B

    更新日期:2004-06-01 00:00:00

  • Spatial gradients controlling spindle assembly.

    abstract::The mitotic spindle is the macromolecular machine utilized to accurately segregate chromosomes in cells. How this self-organized structure assembles is a key aspect of understanding spindle morphogenesis. In the present review, we focus on understanding mechanisms of spindle self-assembly and address how subcellular s...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST20140243

    authors: Weaver LN,Walczak CE

    更新日期:2015-02-01 00:00:00

  • Calcium oscillations in T-cells: mechanisms and consequences for gene expression.

    abstract::[Ca(2+)](i) (intracellular Ca(2+) concentration) oscillations play a central role in the activation of T-lymphocytes by antigen. Oscillations in T-cells are absolutely dependent on Ca(2+) influx through store-operated CRAC channels (Ca(2+)-release-activated Ca(2+) channels), and evidence suggests that they arise from ...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/bst0310925

    authors: Lewis RS

    更新日期:2003-10-01 00:00:00

  • Nuclear motors and nuclear structures containing A-type lamins and emerin: is there a functional link?

    abstract::Rapid interphase chromosome territory repositioning appears to function through the action of nuclear myosin and actin, in a nuclear motor complex. We have found that chromosome repositioning when cells leave the cell cycle is not apparent in cells that have mutant lamin A or that are lacking emerin. We discuss the po...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST0361384

    authors: Mehta IS,Elcock LS,Amira M,Kill IR,Bridger JM

    更新日期:2008-12-01 00:00:00

  • Biomarkers in Barrett's oesophagus.

    abstract::Biomarkers are needed to screen multiple stages in the clinical pathway of Barrett's oesophagus patients; from disease diagnosis to risk stratification and predicting response to therapy. Routes to the identification of biomarkers have been recognized by known molecular features of the disease and more recently throug...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST0380343

    authors: Huang Q,Hardie LJ

    更新日期:2010-04-01 00:00:00

  • Perspectives on neuroprotective stroke therapy.

    abstract::After years of setbacks, the perspective of neuroprotective stroke therapy has revived in light of recent study results. We outline in this review how a neuroprotective candidate drug should be developed, beginning with a thorough preclinical evaluation according to the STAIR (Stroke Therapy Academic Industry Roundtab...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST0341271

    authors: Schäbitz WR,Fisher M

    更新日期:2006-12-01 00:00:00

  • Methods for measuring CoA and CoA derivatives in biological samples.

    abstract::CoA (coenzyme A) is a ubiquitous and essential cofactor that acts as an acyl group carrier in biochemical reactions. Apart from participating in numerous metabolic pathways as substrates and intermediates, CoA and a number of its thioester derivatives, such as acetyl-CoA, can also directly regulate the activity of pro...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST20140123

    authors: Tsuchiya Y,Pham U,Gout I

    更新日期:2014-08-01 00:00:00

  • Impact of dietary amino acids and polyamines on intestinal carcinogenesis and chemoprevention in mouse models.

    abstract::Colon cancer in humans is influenced by both genetic and dietary risk factors. The majority of colon cancers have somatic mutations in the APC (adenomatous polyposis coli) tumour-suppressor gene. Dietary arginine enhances the risk of APC-dependent colon carcinogenesis in mouse models by a mechanism involving NOS2 (nit...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章

    doi:10.1042/BST0350322

    authors: Gerner EW

    更新日期:2007-04-01 00:00:00

  • The intestinal immunoendocrine axis: novel cross-talk between enteroendocrine cells and the immune system during infection and inflammatory disease.

    abstract::The intestinal epithelium represents one of our most important interfaces with the external environment. It must remain tightly balanced to allow nutrient absorption, but maintain barrier function and immune homoeostasis, a failure of which results in chronic infection or debilitating inflammatory bowel disease (IBD)....

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST20150090

    authors: Worthington JJ

    更新日期:2015-08-01 00:00:00

  • Beta galactosidases in Arabidopsis and tomato - a mini review.

    abstract::Beta galactosidases (BGALs) are glycosyl hydrolases that remove terminal β-D-galactosyl residues from β-D-galactosides. There are 17 predicted BGAL genes in the genomes of both Arabidopsis (BGAL1-17) and tomato (TBG1-17). All tested BGALs have BGAL activity but their distinct expression profiles and ancient phylogenet...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST20150217

    authors: Chandrasekar B,van der Hoorn RA

    更新日期:2016-02-01 00:00:00

  • Neuropilin regulation of angiogenesis.

    abstract::Blood vessel formation during vertebrate development relies on a process called angiogenesis and is essential for organ growth and tissue viability. In addition, angiogenesis leads to pathological blood vessel growth in diseases with tissue ischaemia, such as neovascular eye disease and cancer. Neuropilin 1 (NRP1) is ...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST20140244

    authors: Lampropoulou A,Ruhrberg C

    更新日期:2014-12-01 00:00:00

  • The furanosidic scaffold of d-ribose: a milestone for cell life.

    abstract::The recruitment of the furanosidic scaffold of ribose as the crucial step for nucleotides and then for nucleic acids synthesis is presented. Based on the view that the selection of molecules to be used for relevant metabolic purposes must favor structurally well-defined molecules, the inadequacy of ribose as a prefere...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST20190749

    authors: Del-Corso A,Cappiello M,Moschini R,Balestri F,Mura U,Ipata PL

    更新日期:2019-12-20 00:00:00

  • Polyunsaturated fatty acid-specific elongation enzymes.

    abstract::We have isolated a novel gene (GLELO) from Mortierella alpina and its homologue (CEELO1) from Caenorhabditis elegans and demonstrate the involvement of their encoded proteins in the elongation of C(18) polyunsaturated fatty acids. ...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章

    doi:

    authors: Das T,Thurmond JM,Bobik E,Leonard AE,Parker-Barnes JM,Huang YS,Mukerji P

    更新日期:2000-12-01 00:00:00

  • Characterization of AWAP IV, the C-terminal domain of the avian protein AWAK.

    abstract::AWAP IV constitutes the C-terminal domain of the larger 81 kDa protein AWAK [Avian WAP (whey acidic protein) domain- and Kunitz domain-containing], which is predicted, through conserved domain database searching, to contain at least four WAP domains and one Kunitz domain. RT (reverse transcription)-PCR analyses reveal...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章

    doi:10.1042/BST20060267

    authors: Townes CL,Milona P,Hall J

    更新日期:2006-04-01 00:00:00

  • Dissecting metabolism using zebrafish models of disease.

    abstract::Zebrafish (Danio rerio) are becoming an increasingly powerful model organism to study the role of metabolism in disease. Since its inception, the zebrafish model has relied on unique attributes such as the transparency of embryos, high fecundity and conservation with higher vertebrates, to perform phenotype-driven che...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST20180335

    authors: Salmi TM,Tan VWT,Cox AG

    更新日期:2019-02-28 00:00:00

  • Use of S1QELs and S3QELs to link mitochondrial sites of superoxide and hydrogen peroxide generation to physiological and pathological outcomes.

    abstract::Changes in mitochondrial superoxide and hydrogen peroxide production may contribute to various pathologies, and even aging, given that over time and in certain conditions, they damage macromolecules and disrupt normal redox signalling. Mitochondria-targeted antioxidants such as mitoQ, mitoVitE, and mitoTEMPO have open...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST20190305

    authors: Watson MA,Wong HS,Brand MD

    更新日期:2019-10-31 00:00:00

  • Exploiting new genome data and Internet resources for the phylogenetic analysis of proteases, substrates and inhibitors.

    abstract::Multiple alignments and phylogenetic tree constructions are established techniques for examining the evolutionary history of protease sequences in organisms such as humans, mice, fruitflies, nematode worms and yeast. They also facilitate the mapping of those conserved positions that are important for structure and cat...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST0350599

    authors: Southan C

    更新日期:2007-06-01 00:00:00

  • Thiol regulation of pro-inflammatory cytokines and innate immunity: protein S-thiolation as a novel molecular mechanism.

    abstract::Inflammation or inflammatory cytokines and oxidative stress have often been associated, and thiol antioxidants, particularly glutathione, have often been seen as possible anti-inflammatory mediators. However, whereas several cytokine inhibitors have been approved for drug use in chronic inflammatory diseases, this has...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST0391268

    authors: Coppo L,Ghezzi P

    更新日期:2011-10-01 00:00:00