Discrimination Among Heteromeric Potassium Channels by Pore-Blocking Conotoxins
نویسندگان
چکیده
منابع مشابه
Preferential assembly of heteromeric small conductance calcium-activated potassium channels.
The activation of small conductance calcium-dependent (SK) channels regulates membrane excitability by causing membrane hyperpolarization. Three subtypes (SK1-3) have been cloned, with each subtype expressed within the nervous system. The locations of channel subunits overlap, with SK1 and SK2 subunits often expressed in the same brain region. We showed that expressed homomeric rat SK1 subunits...
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Low-threshold voltage-gated potassium currents (I(LT)) activating close to resting membrane potentials play an important role in shaping action potential (AP) firing patterns. In the medial nucleus of the trapezoid body (MNTB), I(LT) ensures generation of single APs during each EPSP, so that the timing and pattern of AP firing is preserved on transmission across this relay synapse (calyx of Hel...
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The potassium channels were recently found to be inhibited by animal toxin-like human β-defensin 2 (hBD2), the first defensin blocker of potassium channels. Whether there are other defensin blockers from different organisms remains an open question. Here, we reported the potassium channel-blocking plectasin, the first defensin blocker from a fungus. Based on the similar cysteine-stabilized alph...
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Two-pore domain potassium (K2P) channels have a distinct structure and channel properties, and are involved in a background K+ current. The 15 members of the K2P channels are identified and classified into six subfamilies on the basis of their sequence similarities. The activity of the channels is dynamically regulated by various physical, chemical, and biological effectors. The channels are ex...
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Background: K+ channel toxins are essential tools for the first purifications, analysis of subunit structures and brain localization of voltage-gated K+ (Kv) channels. The effects of a lot of toxins on Kv are not fully known. Methods: Using whole-cell patch clamping technique the action of a series of toxins on Kv3.4 current in rat liver cells with expressed Kv3.4 channels (RLE) cloned cells wa...
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ژورنال
عنوان ژورنال: Biophysical Journal
سال: 2011
ISSN: 0006-3495
DOI: 10.1016/j.bpj.2010.12.3284