Importance of two ATP-binding sites for oligomerization, ATPase activity and chaperone function of mitochondrial Hsp78 protein.

Abstract

The yeast mitochondrial chaperone Hsp78, a homologue of yeast cytosolic Hsp104 and bacterial ClpB, is required for maintenance of mitochondrial functions under heat stress. Here, Hsp78 was purified to homogeneity and shown to form a homo-hexameric complex, with an apparent molecular mass of approximately 440 kDa, in an ATP-dependent manner. Analysis of its… (More)

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