LGI3/2-ADAM23 interactions cluster Kv1 channels in myelinated axons to regulate refractory period.
LGI3/2-ADAM23 interactions cluster Kv1 channels in myelinated axons to regulate refractory period.
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DOI:
10.1083/jcb.202211031
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发表时间:
2023-04-03
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影响因子:
--
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文献类型:
--
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Kozar-Gillan and colleagues reveal a novel molecular pathway in node of Ranvier formation by demonstrating that LGI3/2–ADAM23 interactions cluster and stabilize Shaker-type voltage-gated potassium channels (Kv1) in myelinated axons. These myelin concealed Kv1 channels contribute to basic axonal properties to secure reliable high-frequency firing. Along myelinated axons, Shaker-type potassium channels (Kv1) accumulate at high density in the juxtaparanodal region, directly adjacent to the paranodal axon–glia junctions that flank the nodes of Ranvier. However, the mechanisms that control the clustering of Kv1 channels, as well as their function at this site, are still poorly understood. Here we demonstrate that axonal ADAM23 is essential for both the accumulation and stability of juxtaparanodal Kv1 complexes. The function of ADAM23 is critically dependent on its interaction with its extracellular ligands LGI2 and LGI3. Furthermore, we demonstrate that juxtaparanodal Kv1 complexes affect the refractory period, thus enabling high-frequency burst firing of action potentials. Our findings not only reveal a previously unknown molecular pathway that regulates Kv1 channel clustering, but they also demonstrate that the juxtaparanodal Kv1 channels that are concealed below the myelin sheath, play a significant role in modifying axonal physiology.
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影响因子:
5.5
作者:
Elizondo, D. M.;Andargie, T. E.;Lipscomb, M. W.
通讯作者:
Lipscomb, M. W.
影响因子:
9.8
作者:
通讯作者:
--
影响因子:
10.6
作者:
Edwards DR;Handsley MM;Pennington CJ
通讯作者:
Pennington CJ
DOI:
10.1523/jneurosci.1015-11.2011
发表时间:
2011-06-01
期刊:
The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子:
--
作者:
Buttermore ED;Dupree JL;Cheng J;An X;Tessarollo L;Bhat MA
通讯作者:
Bhat MA
影响因子:
3.7
作者:
Cifuentes-Diaz C;Chareyre F;Garcia M;Devaux J;Carnaud M;Levasseur G;Niwa-Kawakita M;Harroch S;Girault JA;Giovannini M;Goutebroze L
通讯作者:
Goutebroze L