Channelpedia

PubMed 8386525


Referenced in Channelpedia wiki pages of: none

Automatically associated channels: Cav2.2 , Slo1



Title: Primary structure and functional expression of the omega-conotoxin-sensitive N-type calcium channel from rabbit brain.

Authors: Y Fujita, M Mynlieff, R T Dirksen, M S Kim, T Niidome, J Nakai, T Friedrich, N Iwabe, T Miyata, T Furuichi

Journal, date & volume: Neuron, 1993 Apr , 10, 585-98

PubMed link: http://www.ncbi.nlm.nih.gov/pubmed/8386525


Abstract
The complete amino acid sequence of a rabbit brain calcium channel (BIII) has been deduced by cloning and sequencing the cDNA. The open reading frame encodes 2339 amino acids, which corresponds to an M(r) of 261,167. A phylogenetic tree representing evolutionary relationships indicates that BIII is grouped together with the other rabbit brain calcium channels, BI and BII, into a subfamily that is distinct from the dihydropyridine-sensitive L-type subfamily. Transient expression in cultured skeletal muscle myotubes derived from muscular dysgenic mice demonstrates that the BIII channel mediates an omega-conotoxin-sensitive calcium current with kinetics and voltage dependence like those previously reported for whole-cell N-type current. Cell-attached patch recordings, with isotonic barium as the charge carrier, revealed distinct single channels with an average slope conductance of 14.3 pS.