Immunoproximity biotinylation reveals the axon initial segment proteome.
Immunoproximity biotinylation reveals the axon initial segment proteome.
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DOI:
10.1038/s41467-023-44015-2
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发表时间:
2023-12-11
影响因子:
16.6
通讯作者:
Zou, Peng
中科院分区:
文献类型:
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作者:
Zhang, Wei;Fu, Yu;Peng, Luxin;Ogawa, Yuki;Ding, Xiaoyun;Rasband, Anne;Zhou, Xinyue;Shelly, Maya;Rasband, Matthew N.;Zou, Peng
The axon initial segment (AIS) is a specialized neuronal compartment required for action potential generation and neuronal polarity. However, understanding the mechanisms regulating AIS structure and function has been hindered by an incomplete knowledge of its molecular composition. Here, using immuno-proximity biotinylation we further define the AIS proteome and its dynamic changes during neuronal maturation. Among the many AIS proteins identified, we show that SCRIB is highly enriched in the AIS both in vitro and in vivo, and exhibits a periodic architecture like the axonal spectrin-based cytoskeleton. We find that ankyrinG interacts with and recruits SCRIB to the AIS. However, loss of SCRIB has no effect on ankyrinG. This powerful and flexible approach further defines the AIS proteome and provides a rich resource to elucidate the mechanisms regulating AIS structure and function. The molecular composition of the axon initial segment (AIS) is not well defined. Here, the authors used a ratiometric immunoproximity labeling strategy on fixed wild-type rat neurons to identify the AIS proteome, including the scaffolding protein SCRIB.
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影响因子:
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通讯作者:
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