Ion conduction through C-type inactivated Shaker channels.
Ion conduction through C-type inactivated Shaker channels.
复制标题
离子通过C型灭活振荡器通道传导。
DOI:
10.1085/jgp.110.5.539
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发表时间:
1997-11
影响因子:
3.8
通讯作者:
Heinemann, SH
中科院分区:
文献类型:
--
作者:
Starkus, JG;Kuschel, L;Rayner, MD;Heinemann, SH
C-type inactivation of Shaker potassium channels involves entry into a state (or states) in which the inactivated channels appear nonconducting in physiological solutions. However, when Shaker channels, from which fast N-type inactivation has been removed by NH2-terminal deletions, are expressed in Xenopus oocytes and evaluated in inside-out patches, complete removal of K+ ions from the internal solution exposes conduction of Na+ and Li+ in C-type inactivated conformational states. The present paper uses this observation to investigate the properties of ion conduction through C-type inactivated channel states, and demonstrates that both activation and deactivation can occur in C-type states, although with slower than normal kinetics. Channels in the C-type states appear “inactivated” (i.e., nonconducting) in physiological solutions due to the summation of two separate effects: first, internal K+ ions prevent Na+ ions from permeating through the channel; second, C-type inactivation greatly reduces the permeability of K+ relative to the permeability of Na+, thus altering the ion selectivity of the channel.
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影响因子:
3.8
作者:
Holmgren, M;Smith, PL;Yellen, G
通讯作者:
Yellen, G
影响因子:
3.4
作者:
Ogielska, EM;Zagotta, WN;Aldrich, RW
通讯作者:
Aldrich, RW
影响因子:
3.8
作者:
SALA, S;MATTESON, DR
通讯作者:
MATTESON, DR
DOI:
10.1085/jgp.103.2.279
发表时间:
1994-02
期刊:
The Journal of general physiology
影响因子:
--
作者:
Zagotta WN;Hoshi T;Dittman J;Aldrich RW
通讯作者:
Aldrich RW
影响因子:
16.2
作者:
Liu, Y;Jurman, ME;Yellen, G
通讯作者:
Yellen, G