Mediates the voltage-dependent sodium ion permeability of excitable membranes. Assuming opened or closed conformations in response to the voltage difference across the membrane, the protein forms a sodium-selective channel through which Na(+) ions may pass in accordance with their electrochemical gradient. It is a tetrodotoxin-sensitive Na(+) channel isoform. Plays a role in pain mechanisms, especially in the development of inflammatory pain.
Background References
1. Henningsen K et al. Candidate hippocampal biomarkers of susceptibility and resilience to stress in a rat model of depression. Mol Cell Proteomics 11:M111.016428 (2012).
2. Weiss J et al. Loss-of-function mutations in sodium channel Nav1.7 cause anosmia. Nature 472:186-90 (2011).
Sequence Similarity
Belongs to the sodium channel (TC 1.A.1.10) family. Nav1.7/SCN9A subfamily.
Tissue Specificity
Expressed strongly in dorsal root ganglion, with only minor levels elsewhere in the body, smooth muscle cells, MTC cell line and C-cell carcinoma. Isoform 1 is expressed preferentially in the central and peripheral nervous system. Isoform 2 is expressed preferentially in the dorsal root ganglion.
Post-translational Modification
Phosphorylation at Ser-1490 by PKC in a highly conserved cytoplasmic loop increases peak sodium currents.; Ubiquitinated by NEDD4L; which may promote its endocytosis. Does not seem to be ubiquitinated by NEDD4.
ICC staining NaV1.7 (green) in A549 cells. The nuclear counter stain is DAPI (blue). Cells were fixed in paraformaldehyde, permeabilised with 0.25% Triton X100/PBS.
ICC staining NaV1.7 (green) in Hela cells. The nuclear counter stain is DAPI (blue). Cells were fixed in paraformaldehyde, permeabilised with 0.25% Triton X100/PBS.
Immunohistochemical analysis of paraffin-embedded human colon cancer tissue using anti-NaV1.7 antibody. Counter stained with hematoxylin.
Immunohistochemical analysis of paraffin-embedded human kidney tissue using anti-NaV1.7 antibody. Counter stained with hematoxylin.
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