par Pan, Xingxiu;Cao, Yujie;Stucchi, Riccardo;Hooikaas, Peter Jan;Portegies, Sybren;Will, Lena;Martin, Maud ;Akhmanova, Anna;Harterink, Martin;Hoogenraad, Casper CC
Référence Cell reports, 26, 8, page (1988-1999.e6)
Publication Publié, 2019-05-01
Référence Cell reports, 26, 8, page (1988-1999.e6)
Publication Publié, 2019-05-01
Article révisé par les pairs
Résumé : | The motor protein kinesin-1 plays an important role in polarized sorting of transport vesicles to the axon. However, the mechanism by which the axonal entry of kinesin-1-dependent cargo transport is regulated remains unclear. Microtubule-associated protein MAP7 (ensconsin in Drosophila) is an essential kinesin-1 cofactor and promotes kinesin-1 recruitment to microtubules. Here, we found that MAP7 family member MAP7D2 concentrates at the proximal axon, where it overlaps with the axon initial segment and interacts with kinesin-1. Depletion of MAP7D2 results in reduced axonal cargo entry and defects in axon development and neuronal migration. We propose a model in which MAP7D2 in the proximal axon locally promotes kinesin-1-mediated cargo entry into the axon. |