The cloning and expression of a sodium channel β1-subunit cDNA from human brain

Andrea I. McClatchey, Stephen C. Cannon, Susan A. Slaugenhaupt, James F. Gusella

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Abstract

Electrical excitability of neurons and muscle cells is mediated largely through the actions of the voltage-gated sodium channel. Initiation and propagation of the action potential is a direct result of the precisely controlled inward flux of sodium through these channels. Much attention has been paid to the sodium channel α-subunit, the major, pore-forming component. However, α-subunits are associated with one or more smaller β-subunits, which have been implicated in the critical fine tuning of the gating properties of the channel. To investigate the properties of the β-subunit, we have isolated a cDNA encoding the human brain β1-subunit and assigned the corresponding gene to chromosome 19. We have also examined the effects of expressing the brain β1-subunit on the kinetics of a coexpressed muscle sodium channel α-subunit. Our results underscore the functional importance of the β1-subunit and imply a conserved mechanism for the interaction of the β1-subunit with different α-subunits.

Original languageEnglish (US)
Pages (from-to)745-749
Number of pages5
JournalHuman molecular genetics
Volume2
Issue number6
DOIs
StatePublished - Jun 1 1993

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ASJC Scopus subject areas

  • Molecular Biology
  • Genetics
  • Genetics(clinical)

Cite this

McClatchey, A. I., Cannon, S. C., Slaugenhaupt, S. A., & Gusella, J. F. (1993). The cloning and expression of a sodium channel β1-subunit cDNA from human brain. Human molecular genetics, 2(6), 745-749. https://doi.org/10.1093/hmg/2.6.745