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Neuronal Polarity: MAP2 Shifts Secretory Vesicles into High Gear for Long-Haul Transport down the Axon  Luís F. Ribeiro, Joris de Wit  Neuron  Volume.

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Presentation on theme: "Neuronal Polarity: MAP2 Shifts Secretory Vesicles into High Gear for Long-Haul Transport down the Axon  Luís F. Ribeiro, Joris de Wit  Neuron  Volume."— Presentation transcript:

1 Neuronal Polarity: MAP2 Shifts Secretory Vesicles into High Gear for Long-Haul Transport down the Axon  Luís F. Ribeiro, Joris de Wit  Neuron  Volume 94, Issue 2, Pages (April 2017) DOI: /j.neuron Copyright © 2017 Elsevier Inc. Terms and Conditions

2 Figure 1 MAP2 Controls Selective Axonal Cargo Sorting by Regulating Kinesin Activity In sensory neurons, MAP2 (blue) localizes to the cell body and proximal segment of the axon. Secretory vesicles (purple) contain two distinct kinesin motors: the “slow” motor KIF5/kinesin-1 (red) and the “fast” motor KIF1/kinesin-3 (green). MAP2 selectively binds to KIF5, inhibiting slow motor activity and allowing the fast motor to drive vesicles out into the axon. In the distal segment, MAP2 inhibition of KIF5 wears off, allowing slower motor activity to distribute vesicles along the axon. Following knockdown of MAP2, slower vesicles are retained in the cell body and the proximal segment of the axon, leading to cargo depletion distally. Thus, the presence of two distinct kinesin motors on a single vesicle and selective regulation of kinesin activity by MAP2 in the proximal segment regulate axon entry and cargo distribution. Neuron  , DOI: ( /j.neuron ) Copyright © 2017 Elsevier Inc. Terms and Conditions

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