ArticleCurrent biology : CB2016
Tropomyosin Promotes Lamellipodial Persistence by Collaborating with Arp2/3 at the Leading Edge.
Article in Current biology : CB, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers.
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Who cites it
33 citing papers in PubMed, 48 citations in OpenAlex.
- Functional redundancy and formin-isoform independent localization of tropomyosin paralogs in Saccharomyces cerevisiae.PLoS genetics · 2025Article
- Fluorescent protein tags for human tropomyosin isoform comparison.Biology open · 2025Article
- Cytoskeletal regulation on polycaprolactone/graphene porous scaffolds for bone tissue engineering.Scientific reports · 2024Article
- Tropomyosin 1 deficiency facilitates cell state transitions and enhances hemogenic endothelial cell specification during hematopoiesis.Stem cell reports · 2024Article
- Functional and Structural Properties of Cytoplasmic Tropomyosin Isoforms Tpm1.8 and Tpm1.9.International journal of molecular sciences · 2024Article
- Tropomyosin1 isoforms underlie epithelial to mesenchymal plasticity, metastatic dissemination, and resistance to chemotherapy in high-grade serous ovarian cancer.Cell death and differentiation · 2024Article
- Role of Cyclins and Cytoskeletal Proteins in Endometriosis: Insights into Pathophysiology.Cancers · 2024Review
- Abnormal TPM2 expression is involved in regulation of atherosclerosis progression via mediating RhoA signalingArchives of medical science : AMS · 2024Article
- Tropomyosin 1 deficiency facilitates cell state transitions to enhance hemogenic endothelial cell specification during hematopoiesis.bioRxiv : the preprint server for biology · 2023Article
- Article
- The Giardia ventrolateral flange is a lamellar membrane protrusion that supports attachment.PLoS pathogens · 2022Article
- Correlative cryo-ET identifies actin/tropomyosin filaments that mediate cell-substrate adhesion in cancer cells and mechanosensitivity of cell proliferation.Nature materials · 2022Article
- Survey of cancer cell anatomy in nonadhesive confinement reveals a role for filamin-A and fascin-1 in leader bleb-based migration.Molecular biology of the cell · 2021Article
- Actin filament oxidation by MICAL1 suppresses protections from cofilin-induced disassembly.EMBO reports · 2021Article
- CORO1C is Associated With Poor Prognosis and Promotes Metastasis Through PI3K/AKT Pathway in Colorectal Cancer.Frontiers in molecular biosciences · 2021Article
- Utilization of Laser Capture Microdissection Coupled to Mass Spectrometry to Uncover the Proteome of Cellular Protrusions.Methods in molecular biology (Clifton, N.J.) · 2021Article
- Dynamics of Tpm1.8 domains on actin filaments with single-molecule resolution.Molecular biology of the cell · 2020Article
- Tropomyosin isoforms regulate cofilin 1 activity by modulating actin filament conformation.Archives of biochemistry and biophysics · 2020Article
- Tropomodulins Control the Balance between Protrusive and Contractile Structures by Stabilizing Actin-Tropomyosin Filaments.Current biology : CB · 2020Article
- Actin-tropomyosin distribution in non-muscle cells.Journal of muscle research and cell motility · 2020Review
Corrections and comments
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Authors and funding
7 authors at 2 institutions in 2 countries.
Funding
Abstract
At the leading edge of migrating cells, protrusion of the lamellipodium is driven by Arp2/3-mediated polymerization of actin filaments [1]. This dense, branched actin network is promoted and stabilized by cortactin [2, 3]. In order to drive filament turnover, Arp2/3 networks are remodeled by proteins such as GMF, which blocks the actin-Arp2/3 interaction [4, 5], and coronin 1B, which acts by directing SSH1L to the lamellipodium where it activates the actin-severing protein cofilin [6, 7]. It has been shown in vitro that cofilin-mediated severing of Arp2/3 actin networks results in the generation of new pointed ends to which the actin-stabilizing protein tropomyosin (Tpm) can bind [8]. The presence of Tpm in lamellipodia, however, is disputed in the literature [9-19]. Here, we report that the Tpm isoforms 1.8/9 are enriched in the lamellipodium of fibroblasts as detected with a novel isoform-specific monoclonal antibody. RNAi-mediated silencing of Tpm1.8/9 led to an increase of Arp2/3 accumulation at the cell periphery and a decrease in the persistence of lamellipodia and cell motility, a phenotype consistent with cortactin- and coronin 1B-deficient cells [2, 7]. In the absence of coronin 1B or cofilin, Tpm1.8/9 protein levels are reduced while, conversely, inhibition of Arp2/3 with CK666 leads to an increase in Tpm1.8/9 protein. These findings establish a novel regulatory mechanism within the lamellipodium whereby Tpm collaborates with Arp2/3 to promote lamellipodial-based cell migration.
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