JIP1 regulates the directionality of APP axonal transport by coordinating kinesin and dynein motors.
JIP1 regulates the directionality of APP axonal transport by coordinating kinesin and dynein motors.
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DOI:
10.1083/jcb.201302078
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发表时间:
2013-08-05
期刊:
影响因子:
--
通讯作者:
Holzbaur EL
中科院分区:
文献类型:
--
作者:
Fu MM;Holzbaur EL
Phosphorylation of the scaffolding protein JIP1 serves as a molecular switch to coordinate anterograde and retrograde microtubule motor complexes involved in amyloid precursor protein transport. Regulation of the opposing kinesin and dynein motors that drive axonal transport is essential to maintain neuronal homeostasis. Here, we examine coordination of motor activity by the scaffolding protein JNK-interacting protein 1 (JIP1), which we find is required for long-range anterograde and retrograde amyloid precursor protein (APP) motility in axons. We identify novel interactions between JIP1 and kinesin heavy chain (KHC) that relieve KHC autoinhibition, activating motor function in single molecule assays. The direct binding of the dynactin subunit p150Glued to JIP1 competitively inhibits KHC activation in vitro and disrupts the transport of APP in neurons. Together, these experiments support a model whereby JIP1 coordinates APP transport by switching between anterograde and retrograde motile complexes. We find that mutations in the JNK-dependent phosphorylation site S421 in JIP1 alter both KHC activation in vitro and the directionality of APP transport in neurons. Thus phosphorylation of S421 of JIP1 serves as a molecular switch to regulate the direction of APP transport in neurons.
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影响因子:
9.2
作者:
Dajas-Ballador, Federico;Jones, Emma V.;Whitmarsh, Alan J.
通讯作者:
Whitmarsh, Alan J.
DOI:
10.1083/jcb.200601067
发表时间:
2006-05-22
期刊:
The Journal of cell biology
影响因子:
--
作者:
Glater EE;Megeath LJ;Stowers RS;Schwarz TL
通讯作者:
Schwarz TL
DOI:
10.1126/science.1226734
发表时间:
2012-11-02
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Derr ND;Goodman BS;Jungmann R;Leschziner AE;Shih WM;Reck-Peterson SL
通讯作者:
Reck-Peterson SL
DOI:
10.1073/pnas.0803575105
发表时间:
2008-07-01
影响因子:
11.1
作者:
Dietrich, Kristen A.;Sindelar, Charles V.;Rice, Sarah E.
通讯作者:
Rice, Sarah E.
影响因子:
64.5
作者:
Bowman, AB;Kamal, A;Goldstein, LSB
通讯作者:
Goldstein, LSB