Efa6 regulates axon growth, branching and maintenance by eliminating off-track microtubules at the cortex
Efa6 regulates axon growth, branching and maintenance by eliminating off-track microtubules at the cortex
复制标题
Efa6 通过消除皮层偏离轨道的微管来调节轴突生长、分支和维护
DOI:
10.1101/385658
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发表时间:
2018
期刊:
影响因子:
--
通讯作者:
A. Prokop
中科院分区:
文献类型:
--
作者:
Yue Qu;Ines Hahn;Meredith Lees;J. Parkin;André Voelzmann;Karel Dorey;Alex Rathbone;Claire T. Friel;V. Allan;Pilar Okenve Ramos;N. Sánchez;A. Prokop
Axons are the enormously long, cable-like neuronal extensions that wire our nervous system. The formation and plastic maintenance of these delicate structures requires parallel bundles of microtubules (MTs), which form the structural backbones and highways for life-sustaining transport in axons. In ageing and certain axonopathies, axonal MTs lose their bundled appearances forming areas of disorganisation. We use Drosophila to study various mechanisms that promote axonal MT bundle organisation and dynamics during development and maintenance. Here we report important roles of the membrane-associated protein Efa6 in axonal MT regulation relevant for axonal growth, branching and MT bundle maintenance. Efa6 acts as a typical cortical MT collapse factor by eliminating MTs that approach the axonal plasma membrane. This action abolishes MTs that have left the axon bundle, thus providing a quality control mechanism that prevents MT disorganisation during the formation and maintenance of axons. Furthermore, we find this action to reduce axonal growth and branch formation in cultured neurons and in vivo. Using structure-function analyses, we show that cytoplasmic localisation of a small N-terminal peptide motif alone is sufficient to eliminate entire MT networks in mouse fibroblasts, and loss of whole axons in Drosophila primary neurons. This highly destructive activity becomes meaningful when restricted to the cell plasma membrane via the plekstrin homology domain present in the Efa6 C-terminus. Our data provide a paradigm for the fundamental and disease-relevant role of cortical collapse factors in neurons.
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DOI:
10.1101/577320
发表时间:
2019
期刊:
--
影响因子:
--
作者:
Hahn I
通讯作者:
Hahn I
影响因子:
3.8
作者:
Voelzmann A;Hahn I;Pearce SP;Sánchez-Soriano N;Prokop A
通讯作者:
Prokop A
影响因子:
7.2
作者:
Dent EW;Gupton SL;Gertler FB
通讯作者:
Gertler FB
DOI:
10.1002/neu.480220503
发表时间:
1991-07-01
期刊:
JOURNAL OF NEUROBIOLOGY
影响因子:
--
作者:
ROBINOW, S;WHITE, K
通讯作者:
WHITE, K
影响因子:
3.3
作者:
da Cruz, AB;Schwärzel, M;Kretzschmar, D
通讯作者:
Kretzschmar, D