Cellular concentrations of free G-actin, profilin- and thymosin-β4–bound G-actin, and free barbed and pointed ends of actin filaments, respectively

Range 1.98 μM, 9.52 μM, 88.5 μM, 4.8 nM, and 5.5 nM
Organism Unspecified
Reference Kiuchi T, Nagai T, Ohashi K, Mizuno K. Measurements of spatiotemporal changes in G-actin concentration reveal its effect on stimulus-induced actin assembly and lamellipodium extension. J Cell Biol. 2011 Apr 18 193(2):365-80. doi: 10.1083/jcb.201101035. p.370 left column top paragraphPubMed ID21502360
Comments P.368 right column bottom paragraph to p.370 left column top paragraph:"Assuming that the total concentrations of G-actin, profilin, and thymosin-β4 are 100, 10, and 200 μM (BNID 112134), respectively, the cellular concentrations of free G-actin, profilin- and thymosin-β4–bound G-actin, and free barbed and pointed ends of actin filaments under unstimulated conditions were estimated as 1.98 μM, 9.52 μM, 88.5 μM, 4.8 nM, and 5.5 nM, respectively, from the best-fit of the time curve of relative FDAP (fluorescence decay after photoactivation, see Materials and methods). Thus, the high time resolution and quantitative features of s-FDAP [sequential FDAP] analysis allowed [investigators] to estimate the cellular concentrations of key components involved in the regulation of actin dynamics by model analysis."
Entered by Uri M
ID 112135