The DNL-type zinc-finger protein DNLZ regulates the activity and solubility of the human mitochondrial chaperone HSPA9. To identify DNLZ residues that are critical for chaperone regulation, we carried out an alanine mutagenesis scan of charged residues in a W115I mutant of human DNLZ and assessed the effect of each mutation on interactions with HSPA9. All mutants analyzed promote the solubility of...
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