Cytoplasmic dynein is a minus end-directed microtubule motor that can be activated by cargo adapters. In Aspergillus nidulans, overexpression of ΔC-HookA, the early endosomal adapter HookA missing its cargo-binding site, causes activated dynein to accumulate at septa and spindle pole bodies (SPBs) where the microtubule-organizing centers are located. Intriguingly, only some interphase nuclei show SPB signals of dynein. Here we present data demonstrating that localization of the activated dynein at SPBs is cell cycle-dependent: SPB dynein signals are seen to associate with nuclei at early G1 but disappear at about the G1-S boundary.
Keywords: Aspergillus nidulans; Dynein; Spindle-pole body.
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