Zn2+ decoration of microtubules arrests axonal transport and displaces tau, doublecortin, and MAP2C.
Zn2+ decoration of microtubules arrests axonal transport and displaces tau, doublecortin, and MAP2C.
复制标题
微管的Zn 2+装饰阻止轴突运输并取代tau、doublecortin和MAP2C。
DOI:
10.1083/jcb.202208121
复制
发表时间:
2023-08-07
影响因子:
7.8
通讯作者:
Qin, Yan
中科院分区:
文献类型:
--
作者:
Minckley, Taylor F.;Salvagio, Lyndsie A.;Fudge, Dylan H.;Verhey, Kristen;Markus, Steven M.;Qin, Yan
Minckley et al. identify a Zn2+-dependent mechanism that regulates microtubule-based processes, in which microtubule decoration by Zn2+ disturbs axonal transport via directly inhibiting movement of motor proteins and regulating microtubule binding of doublecortin (DCX), tau, and MAP2C, without disrupting other MAPs. Intracellular Zn2+ concentrations increase via depolarization-mediated influx or intracellular release, but the immediate effects of Zn2+ signals on neuron function are not fully understood. By simultaneous recording of cytosolic Zn2+ and organelle motility, we find that elevated Zn2+ (IC50 ≈ 5–10 nM) reduces both lysosomal and mitochondrial motility in primary rat hippocampal neurons and HeLa cells. Using live-cell confocal microscopy and in vitro single-molecule TIRF imaging, we reveal that Zn2+ inhibits activity of motor proteins (kinesin and dynein) without disrupting their microtubule binding. Instead, Zn2+ directly binds to microtubules and selectively promotes detachment of tau, DCX, and MAP2C, but not MAP1B, MAP4, MAP7, MAP9, or p150glued. Bioinformatic predictions and structural modeling show that the Zn2+ binding sites on microtubules partially overlap with the microtubule binding sites of tau, DCX, dynein, and kinesin. Our results reveal that intraneuronal Zn2+ regulates axonal transport and microtubule-based processes by interacting with microtubules.
登录
查看更多内容
DOI:
10.1083/jcb.200911024
发表时间:
2010-08-09
期刊:
The Journal of cell biology
影响因子:
--
作者:
Friedman JR;Webster BM;Mastronarde DN;Verhey KJ;Voeltz GK
通讯作者:
Voeltz GK
DOI:
10.1111/tra.12537
发表时间:
2018-03
期刊:
Traffic (Copenhagen, Denmark)
影响因子:
--
作者:
Chaudhary AR;Berger F;Berger CL;Hendricks AG
通讯作者:
Hendricks AG
DOI:
10.1126/science.1164424
发表时间:
2008-12-12
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Carter AP;Garbarino JE;Wilson-Kubalek EM;Shipley WE;Cho C;Milligan RA;Vale RD;Gibbons IR
通讯作者:
Gibbons IR
影响因子:
13.6
作者:
Even, Aviel;Morelli, Giovanni;Nguyen, Laurent
通讯作者:
Nguyen, Laurent
DOI:
10.1523/jneurosci.4603-12.2013
发表时间:
2013-01-09
期刊:
The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子:
--
作者:
Fu X;Brown KJ;Yap CC;Winckler B;Jaiswal JK;Liu JS
通讯作者:
Liu JS