Axonal transport of mitochondria requires milton to recruit kinesin heavy chain and is light chain independent.

Axonal transport of mitochondria requires milton to recruit kinesin heavy chain and is light chain independent.
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DOI:
10.1083/jcb.200601067
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发表时间:
2006-05-22
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Schwarz TL
Schwarz TL
中科院分区:
其他
文献类型:
--
作者:
Glater EE;Megeath LJ;Stowers RS;Schwarz TL

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Mitochondria are distributed within cells to match local energy demands. We report that the microtubule-dependent transport of mitochondria depends on the ability of milton to act as an adaptor protein that can recruit the heavy chain of conventional kinesin-1 (kinesin heavy chain [KHC]) to mitochondria. Biochemical and genetic evidence demonstrate that kinesin recruitment and mitochondrial transport are independent of kinesin light chain (KLC); KLC antagonizes milton's association with KHC and is absent from milton–KHC complexes, and mitochondria are present in klc −/− photoreceptor axons. The recruitment of KHC to mitochondria is, in part, determined by the NH2 terminus–splicing variant of milton. A direct interaction occurs between milton and miro, which is a mitochondrial Rho-like GTPase, and this interaction can influence the recruitment of milton to mitochondria. Thus, milton and miro are likely to form an essential protein complex that links KHC to mitochondria for light chain–independent, anterograde transport of mitochondria.
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