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Cytoplasmic ATP inhibition of CLC-1 is enhanced by low pH. | LitMetric

Cytoplasmic ATP inhibition of CLC-1 is enhanced by low pH.

J Gen Physiol

Center foor Neuroscience and Department of Neurology, University of California, Davis, CA 95616, USA.

Published: August 2007

AI Article Synopsis

Article Abstract

The CLC-1 Cl(-) channel is abundantly expressed on the plasma membrane of muscle cells, and the membrane potential of muscle cells is largely controlled by the activity of this Cl(-) channel. Previous studies showed that low intracellular pH increases the overall open probability of recombinant CLC-1 channels in various expression systems. Low intracellular pH, however, is known to inhibit the Cl(-) conductance on the native muscle membrane, contradicting the findings from the recombinant CLC-1 channels in expressed systems. Here we show that in the presence of physiological concentrations of ATP, reduction of the intracellular pH indeed inhibits the expressed CLC-1, mostly by decreasing the open probability of the common gate of the channel.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2151639PMC
http://dx.doi.org/10.1085/jgp.200709817DOI Listing

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