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Spastin's Microtubule-Binding Properties and Comparison to Katanin

Figure 9

Domain-Mapping of the Katanin-Microtubule Interaction.

Panel A displays the constructs used for katanin binding experiments. Panel B shows a quantitative SDS-gel of supernatants (unbound) and pellets (microtubule-bound) of an in vitro binding assay of truncated katanin constructs and microtubules. Increasing microtubule concentrations (0 to 10 µM) were incubated with a fixed katanin construct concentration (1 µM). The density of the katanin construct band was plotted against the microtubule concentration and fitted to a Hill function (panel C). The half-maximal saturation was reached at 0.34 µM (Kat12) and 0.40 µM (Kat2). Only constructs containing domain 2 were able to bind to microtubules.

Figure 9

doi: https://doi.org/10.1371/journal.pone.0050161.g009