Journal: Traffic (Copenhagen, Denmark)
Article Title: The Translocation Selectivity of the Kinesins that Mediate Neuronal Organelle Transport
doi: 10.1111/j.1600-0854.2011.01325.x
Figure Lengend Snippet: (A) Addition of an Fv domain to the C-termini of KIF13A or 13B enabled induction of homodimerization by addition of AP20187. (B) Addition of AP20187 to a cell expressing KIF13B393Fv caused the kinesin to accumulate at neurite tips. Just before drug addition (0 min), GFP-KIF13B393Fv was distributed diffusely throughout the cell. Within 5 min of adding AP20187 (10 nM), GFP-KIF13B393Fv began to accumulate at neurite tips. The contrast was inverted so that fluorescent signals appear dark on a light background. (C) Distribution of GFP-KIF13A392Fv, GFP-KIF13B393Fv, and GFP-KIF13B393T311M_Fv after incubation with 10nM AP20187. KIF13A392Fv accumulated in axonal but not dendritic tips whereas KIF13B393Fv accumulated in both axonal and dendritic tips. KIF13B393Fv, with a mutation that disrupts microtubule-stimulated ATPase activity, failed to accumulate at either axonal or dendritic tips. Fluorescent signal from the kinesins is shown in red and soluble mRFP in green. Dashed arcs indicate dendritic tips and asterisks indicate axonal tips. Scale bars= 20μm. (D) Translocation preferences of KIF13A392Fv and KIF13B393Fv constructs, based on the analysis of 18 or 15 cells quantified as in Fig. 2. Data points for KIF1A393 and KIF5C559 were taken from the experiment shown in Figure 2I. The image of GFP-KIF13B393T311M_Fv was assembled from 4 microscopic fields as described in Materials and Methods.
Article Snippet: For the KIF13 dimerization assay, an ARGENT TM Regulated Homodimerization Kit (Fv) was obtained from ARIAD Pharmaceuticals (Cambridge, MA).
Techniques: Expressing, Incubation, Mutagenesis, Activity Assay, Translocation Assay, Construct