ArticleThe Journal of cell biology2011
Measurements of spatiotemporal changes in G-actin concentration reveal its effect on stimulus-induced actin assembly and lamellipodium extension.
Article in The Journal of cell biology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 56 papers.
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Who cites it
56 citing papers in PubMed, 96 citations in OpenAlex.
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- Cyclase-associated protein interacts with actin filament barbed ends to promote depolymerization and formin displacement.The Journal of biological chemistry · 2023Article
- G-actin diffusion is insufficient to achieve F-actin assembly in fast-treadmilling protrusions.Biophysical journal · 2023Article
- On the role of myosin-induced actin depolymerization during cell migration.Molecular biology of the cell · 2023Article
- ARPC1A correlates with poor prognosis in prostate cancer and is up-regulated by glutamine metabolism to promote tumor cell migration, invasion and cytoskeletal changes.Cell & bioscience · 2023Article
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- A tug of war between filament treadmilling and myosin induced contractility generates actin rings.eLife · 2022Article
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- ARPC2: A Pan-Cancer Prognostic and Immunological Biomarker That Promotes Hepatocellular Carcinoma Cell Proliferation and Invasion.Frontiers in cell and developmental biology · 2022Article
- Rapid ensemble measurement of protein diffusion and probe blinking dynamics in cells.Biophysical reports · 2021Article
- Measuring expression heterogeneity of single-cell cytoskeletal protein complexes.Nature communications · 2021Article
Corrections and comments
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Authors and funding
4 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
To understand the intracellular role of G-actin concentration in stimulus-induced actin assembly and lamellipodium extension during cell migration, we developed a novel technique for quantifying spatiotemporal changes in G-actin concentration in live cells, consisting of sequential measurements of fluorescent decay after photoactivation (FDAP) of Dronpa-labeled actin. Cytoplasmic G-actin concentrations decreased by ∼40% immediately after cell stimulation and thereafter the cell area extended. The extent of stimulus-induced G-actin loss and cell extension correlated linearly with G-actin concentration in unstimulated cells, even at concentrations much higher than the critical concentration of actin filaments, indicating that cytoplasmic G-actin concentration is a critical parameter for determining the extent of stimulus-induced G-actin assembly and cell extension. Multipoint FDAP analysis revealed that G-actin concentration in lamellipodia was comparable to that in the cell body. We also assessed the cellular concentrations of free G-actin, profilin- and thymosin-β4-bound G-actin, and free barbed and pointed ends of actin filaments by model fitting of jasplakinolide-induced temporal changes in G-actin concentration.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.