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. 2017 Jul 17;8:16064. doi: 10.1038/ncomms16064

Figure 4. Single-molecule fluorescence assay of the ESCRT-III filament disassembly by Vps4 alone or by Vps4 together with Vta1.

Figure 4

(a) Procedure of the single-molecule total internal reflection fluorescence (TIRF) microscope experiment. (b) Negative staining EM micrograph of the ESCRT-III filaments. Scale bar, 50 nm. (c) TIRF microscopy images of Cy3 fluorescence channel representing ESCRT-III filaments after immobilization (left), after disassembly by Vps4 (middle) and after disassembly by Vps4 and Vta1 (right). Scale bar, 10 μm. (d) The average Cy3 fluorescence intensities associated with filaments under various conditions of the disassembly reaction. Data are represented as the average of three independent experiments. Error bars represent s.e.m. (e,f) Single-molecule fluorescence trajectories of Cy5-Vps4 and Cy3-filament during the filament disassembly. (e) Cy5-Vps4 disappeared while almost no changes were observed in the filament coupled Cy3 fluorescence intensity. (f) Cy5-Vps4 disappeared while the filament coupled Cy3 fluorescence intensity was also decreased.