Title: Evidence for cooperative interactions in potassium channel gating
Authors: Tytgat, Jan ×
Hess, P #
Issue Date: Oct-1992
Series Title: Nature vol:359 issue:6394 pages:420-3
Abstract: Cloning and expression of voltage-activated potassium ion-channel complementary DNAs has confirmed that these channels are composed of four identical subunits, each containing a voltage sensor. It has been generally accepted that the voltage sensors must reach a permissive state through one or more conformational ('gating') transitions before the channel can open. To test whether each subunit gates independently, we have constructed cDNAs encoding four subunits on a single polypeptide chain, enabling us to specify the subunit stoichiometry. The gating of heterotetramers made up from combinations of subunits with different gating phenotypes strongly suggests that individual subunits gate cooperatively, rather than independently. Nonindependent subunit gating is consistent with measurements of the kinetics of K(+)-channel gating currents and in line with the widespread subunit cooperativity observed in other multisubunit proteins.
ISSN: 0028-0836
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Toxicology and Pharmacology
× corresponding author
# (joint) last author

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