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- Table of Contents
Facts about Sodium channel subunit beta-1.
Its association with NFASC may target the sodium channels to the nodes of Ranvier of developing axons and keep these channels at the nodes in mature myelinated axons. .
Human | |
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Gene Name: | SCN1B |
Uniprot: | Q07699 |
Entrez: | 6324 |
Belongs to: |
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sodium channel auxiliary subunit SCN1B (TC 8.A.17) family |
Sodium channel subunit beta-1
Mass (kDA):
24.707 kDA
Human | |
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Location: | 19q13.11 |
Sequence: | 19; NC_000019.10 (35030470..35040449) |
The overall expression of isoforms 1 and 2 is very similar. Isoform 1 is abundantly expressed in skeletal muscle, heart and brain. Isoform 2 is highly expressed in brain and skeletal muscle and present at a very low level in heart, placenta, lung, liver, kidney and pancreas. In brain, isoform 2 is most abundant in the cerebellum, followed by the cerebral cortex and occipital lobe, while isoform 1 levels are higher in the cortex compared to the cerebellum. Isoform 2 is expressed in many regions of the brain, including cerebellar Purkinje cells, cortex pyramidal neurons and many of the neuronal fibers throughout the brain (at protein level). Also detected in dorsal root ganglion, in fibers of the spinal nerve and in cortical neurons and their processes (at protein level).
[Isoform 1]: Cell membrane; Single-pass type I membrane protein. Perikaryon. Cell projection. Cell projection, axon. Detected at nodes of Ranvier on the sciatic nerve.; [Isoform 2]: Perikaryon. Cell projection. Secreted. Detected on Purkinje cells and their cell projections and on neuronal cell projections.
PMID: 8394762 by McClatchey A.I., et al. The cloning and expression of a sodium channel beta 1-subunit cDNA from human brain.
PMID: 8125980 by Makita N., et al. Voltage-gated Na+ channel beta 1 subunit mRNA expressed in adult human skeletal muscle, heart, and brain is encoded by a single gene.