Tight folding of a passenger protein can interfere with the targeting function of a mitochondrial presequence.


The first seven residues of the yeast cytochrome oxidase subunit IV presequence are insufficient to target attached mouse dihydrofolate reductase into isolated yeast mitochondria. However, the targeting function of this truncated presequence can be restored by presenting the fusion protein to isolated mitochondria either as nascent, unfolded chains, or as… (More)


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