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We demonstrate that TBCE is a peripheral membrane-associated protein that accumulates at the Golgi apparatus. In<jats:italic>pmn<\/jats:italic>mice, TBCE is destabilized and disappears from the Golgi apparatus of motor neurons, and microtubules are lost in distal axons. The axonal microtubule loss proceeds retrogradely in parallel with the axonal dying back process. These degenerative changes are inhibited in a dose-dependent manner by transgenic TBCE complementation that restores TBCE expression at the Golgi apparatus. In cultured motor neurons, the<jats:italic>pmn<\/jats:italic>mutation, interference RNA-mediated TBCE depletion, and brefeldin A-mediated Golgi disruption all compromise axonal tubulin routing. We conclude that motor axons critically depend on axonal tubulin routing from the Golgi apparatus, a process that involves TBCE and possibly other tubulin chaperones.<\/jats:p>","DOI":"10.1523\/jneurosci.1599-07.2007","type":"journal-article","created":{"date-parts":[[2007,8,15]],"date-time":"2007-08-15T16:53:00Z","timestamp":1187196780000},"page":"8779-8789","source":"Crossref","is-referenced-by-count":51,"title":["Progressive Motor Neuronopathy: A Critical Role of the Tubulin Chaperone TBCE in Axonal Tubulin Routing from the Golgi Apparatus"],"prefix":"10.1523","volume":"27","author":[{"given":"Michael K. 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