GONUTS has been updated to MW1.31 Most things seem to be working but be sure to report problems.

Have any questions? Please email us at ecoliwiki@gmail.com


Jump to: navigation, search


You don't have sufficient rights on this wiki to edit tables. Perhaps you need to log in. Changes you make in the Table editor will not be saved back to the wiki

See Help for Help on this wiki. See the documentation for how to use the table editor


Soh, H and Goldstein, SA (2008) I SA channel complexes include four subunits each of DPP6 and Kv4.2. J. Biol. Chem. 283:15072-7


Kv4 potassium channels produce rapidly inactivating currents that regulate excitability of muscles and nerves. To reconstitute the neuronal A-type current I(SA), Kv4 subunits assemble with DPP6, a single transmembrane domain accessory subunit. DPP6 alters function-accelerating activation, inactivation, and recovery from inactivation-and increases surface expression. We sought here to determine the stoichiometry of Kv4 and DPP6 in complexes using functional and biochemical methods. First, wild type channels formed from subunit monomers were compared with channels carrying subunits linked in tandem to enforce 4:4 and 4:2 assemblies (Kv4.2-DPP6 and Kv4.2-Kv4.2-DPP6). Next, channels were overexpressed and purified so that the molar ratio of subunits in complexes could be assessed by direct amino acid analysis. Both biophysical and biochemical methods indicate that I(SA) channels carry four subunits each of Kv4.2 and DPP6.


PubMed PMC2397469 Online version:10.1074/jbc.M706964200


Animals; Dipeptidyl-Peptidases and Tripeptidyl-Peptidases; Humans; Multiprotein Complexes/genetics; Multiprotein Complexes/metabolism; Muscles/metabolism; Nerve Tissue Proteins/genetics; Nerve Tissue Proteins/metabolism; Neurons/metabolism; Peptide Hydrolases/genetics; Peptide Hydrolases/metabolism; Potassium Channels/genetics; Potassium Channels/metabolism; Protein Structure, Quaternary/physiology; Protein Structure, Tertiary/physiology; Shal Potassium Channels/genetics; Shal Potassium Channels/metabolism; Xenopus laevis