Abstract
The functional relationship between the adenine nucleotide translocator (ANT) and the mitochondrial multiple conductance channel (MCC) was investigated using patch-clamp techniques. MCC activity with the same conductance, ion selectivity, voltage dependence, and peptide sensitivity could be reconstituted from inner membrane fractions derived from mitochondria of ANT-deficient and wild-type Saccharomyces cerevisiae. In addition, the MCC activity of mouse kidney mitoplasts was unaffected by carboxyatractyloside, a known inhibitor of ANT and inducer of a permeability transition. These results suggest that MCC activity is independent of ANT.
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