کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1927353 1536512 2007 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Evidence for a large conductance voltage gated cationic channel in rough endoplasmic reticulum of rat hepatocytes
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
پیش نمایش صفحه اول مقاله
Evidence for a large conductance voltage gated cationic channel in rough endoplasmic reticulum of rat hepatocytes
چکیده انگلیسی

In this work, we report the single channel characterization of a voltage gated cationic channel from rough endoplasmic reticulum (RER) membranes of rat hepatocytes incorporated into a planar lipid bilayer. The channel was found to be cation selective with a main conductance of 598 ± 20 pS in 200 mM KCl cis/50 mM KCl trans. The channel open probability appeared voltage dependent with a voltage for half activation (V1/2) of 38 mV and an effective gating charge z of −6.66. Adding either 4-AP (5 mM) or ATP (2.5 mM) to the side corresponding to the cell internal medium caused a strong inhibition of the channel activity. This channel is likely to be involved in maintaining proper cation homeostasis in the RER of hepatocytes.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Archives of Biochemistry and Biophysics - Volume 457, Issue 1, 1 January 2007, Pages 35–40
نویسندگان
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