Figure 4: αTAT1 expression prevents LRRK2 Roc-COR mutant filamentous structures.

(a) HEK293 cells were co-transfected with acGFP1-tagged LRRK2 variants (green) and either empty vector (Ctrl) or αTAT1 as indicated (3 × excess of empty vector or αTAT1 was used to ensure co-transfection). Twenty-four hours after transfection, the cells were fixed and processed for immunostaining using anti-acetylated α-tubulin antibody (red). Scale bar, 10 μm; zoom, 5 μm. (b) The percentage of empty vector- (Ctrl) and αTAT1-transfected HEK293 cells exhibiting filamentous LRRK2 was quantified (mean±s.e.m.). ***P<0.001, ****P<0.0001, Student’s t-test, N (coverslips counted, ~50 cells per coverslip; from four experiments)=WT, 5; WT+αTAT1, 5; Y1699C, 13; Y1699C+αTAT1, 13; R1441C, 15; R1441C+αTAT1, 13.