Journal
NEURAL REGENERATION RESEARCH
Volume 16, Issue 4, Pages 700-706Publisher
WOLTERS KLUWER MEDKNOW PUBLICATIONS
DOI: 10.4103/1673-5374.295332
Keywords
Alzheimer's disease; ankyrin-G; axon initial segment; casein kinase-2; microtubules; voltage-gated potassium channel; voltage-gated sodium channel
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The presence of high-density AIS protein voltage-gated sodium channels (Nav) at the axon initial segment (AIS) region is crucial for action potential initiation. Computational experiments suggest that Nav channels with all serine sites available for phosphorylation bind to AnkG with strong affinity, and the concentration of Nav channels reduces significantly at low initial concentrations of AnkG and casein kinase 2, highlighting the importance of these proteins in Nav channel recruitment.
The axon initial segment (AIS) region is crucial for action potential initiation due to the presence of high-density AIS protein voltage-gated sodium channels (Nav). Nav channels comprise several serine residues responsible for the recruitment of Nav channels into the structure of AIS through interactions with ankyrin-G (AnkG). In this study, a series of computational experiments are performed to understand the role of AIS proteins casein kinase 2 and AnkG on Nav channel recruitment into the AIS. The computational simulation results using Virtual cell software indicate that Nav channels with all serine sites available for phosphorylation bind to AnkG with strong affinity. At the low initial concentration of AnkG and casein kinase 2, the concentration of Nav channels reduces significantly, suggesting the importance of casein kinase 2 and AnkG in the recruitment of Nav channels.
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