Actin molecules exchange between filamentous and non-filamentous forms in living cells.
Is it true that Actin molecules exchange between filamentous and non-filamentous forms in living cells?
Yes. Actin molecules continuously exchange between filamentous and unpolymerized monomeric states in living cells, driven by regulated polymerization and depolymerization dynamics.
Verdict: SUPPORTED · 5 sources for, 0 against · Last checked
The claim is a fundamental, well-established biological fact about actin cytoskeleton dynamics. Multiple retrieved studies discuss the continuous polymerization, depolymerization, formation, and dissolution of actin filaments in living cells, as well as the pools of unpolymerized monomers. There is no evidence refuting this fact among the retrieved literature.
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Henderson, E., Haydon, P. G., & Sakaguchi, D. S. (1992). Actin Filament Dynamics in Living Glial Cells Imaged by Atomic Force Microscopy. doi.org. https://doi.org/10.1126/science.1411511
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Singhal, P. & Hays, R. (2008). Actin Filament Morphology in Living and Nonliving Cultured Mesangial Cells: Formation and Dissolution. doi.org. https://doi.org/10.1159/000185112
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L, L., X, F., F, F., J, F., J, L., H, Z., M, D. Ž., Y, Y., Z, L., H, H., D, L., F, H., H, L., Y, Z., F, B., M, M., IJ, Y., L, L., X, Y., M, L., Y, L., Q, X., A, K., X, D., JL, G., X, C., M, B., Z, L., Y, H., R, Z., & Y, H. (2026). Actin depolymerization promotes axon regeneration by restoring axonal mitochondrial transport in mouse models of optic neuropathy.. doi.org. https://doi.org/10.1126/scitranslmed.adw0908
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S, B., TM, L., S, C., CC, G., & S, S. (2026). Leiomodin 2 is a processive pointed-end elongator of actin filaments.. doi.org. https://doi.org/10.1038/s41467-026-74809-z
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A, G., L, B., DM, K., & A, Z. (2026). DNase I as a probe for unpolymerized actin: revisiting a classic tool for nuclear actin research.. doi.org. https://doi.org/10.1007/s00424-026-03158-z
What does the evidence say?
The claim is a fundamental, well-established biological fact about actin cytoskeleton dynamics. Multiple retrieved studies discuss the continuous polymerization, depolymerization, formation, and dissolution of actin filaments in living cells, as well as the pools of unpolymerized monomers. There is no evidence refuting this fact among the retrieved literature.
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