Axonal autophagosomes recruit dynein for retrograde transport through fusion with late endosomes.

Axonal autophagosomes recruit dynein for retrograde transport through fusion with late endosomes.
复制标题

轴突自噬体通过融合与晚期内体募集动力蛋白进行逆行转运。

DOI:
10.1083/jcb.201412046
复制
发表时间:
2015-05-11
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Sheng ZH
Sheng ZH
中科院分区:
其他
文献类型:
--
作者:
Cheng XT;Zhou B;Lin MY;Cai Q;Sheng ZH

文献摘要

参考文献

被引文献

相似文献

晚期内体负载的动力蛋白-snapin复合物在远端轴突中自噬体与晚期内体融合后驱动两性体逆行转运。自噬泡(autophagic vacuoles,AVs)通过溶酶体的有效降解是一个重要的细胞内环境稳定过程。这对于神经元来说是特别具有挑战性的,因为成熟的酸性溶酶体相对富集在索马中。虽然动力蛋白驱动的逆行运输的AV建议,一个根本的问题仍然是如何在远端轴突产生的自噬体获得动力蛋白马达逆行运输到索马。在本文中,我们表明,晚内体(LE)加载的动力蛋白snapin复合物驱动AV逆行运输轴突融合后,自噬体与LE成两性体。用突触融合蛋白17敲低阻断融合减少了动力蛋白马达向AV的募集,从而将它们固定在轴突中。缺乏动力蛋白-snapin偶联损害AV运输,导致AV积聚在神经突和突触末梢。总而言之,我们的研究提供了第一个证据,自噬体通过与LE融合招募动力蛋白,并揭示了一种新的马达-适配器共享机制,通过该机制,神经元可以去除远端AV吞噬聚集的蛋白质和功能失调的细胞器,以便在索马体中有效降解。
Late endosome-loaded dynein–snapin complexes drive amphisome retrograde transport upon fusion of autophagosomes with late endosomes in distal axons. Efficient degradation of autophagic vacuoles (AVs) via lysosomes is an important cellular homeostatic process. This is particularly challenging for neurons because mature acidic lysosomes are relatively enriched in the soma. Although dynein-driven retrograde transport of AVs was suggested, a fundamental question remains how autophagosomes generated at distal axons acquire dynein motors for retrograde transport toward the soma. In this paper, we demonstrate that late endosome (LE)–loaded dynein–snapin complexes drive AV retrograde transport in axons upon fusion of autophagosomes with LEs into amphisomes. Blocking the fusion with syntaxin17 knockdown reduced recruitment of dynein motors to AVs, thus immobilizing them in axons. Deficiency in dynein–snapin coupling impaired AV transport, resulting in AV accumulation in neurites and synaptic terminals. Altogether, our study provides the first evidence that autophagosomes recruit dynein through fusion with LEs and reveals a new motor–adaptor sharing mechanism by which neurons may remove distal AVs engulfing aggregated proteins and dysfunctional organelles for efficient degradation in the soma.
DOI: 10.1523/jneurosci.6412-10.2011
发表时间: 2011-05-25
期刊: The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子: --
作者:
Lee S;Sato Y;Nixon RA
通讯作者: Nixon RA
DOI: 10.1083/jcb.201106120
发表时间: 2012-02-20
期刊: The Journal of cell biology
影响因子: --
作者:
Maday S;Wallace KE;Holzbaur EL
通讯作者: Holzbaur EL
DOI: 10.1242/jcs.01370
发表时间: 2004-09-15
影响因子: 4
作者:
Jäger, S;Bucci, C;Eskelinen, EL
通讯作者: Eskelinen, EL
DOI: 10.4161/auto.6.3.11262
发表时间: 2010-04-01
期刊: AUTOPHAGY
影响因子: 13.3
作者:
Katsumata, Kiyoshi;Nishiyama, Jun;Yuzaki, Michisuke
通讯作者: Yuzaki, Michisuke
DOI: 10.1016/j.devcel.2014.04.015
发表时间: 2014-06-09
期刊: DEVELOPMENTAL CELL
影响因子: 11.8
作者:
Fu, Meng-meng;Nirschl, Jeffrey J.;Holzbaur, Erika L. F.
通讯作者: Holzbaur, Erika L. F.