Identification of a 66 KDa protein associated with yeast mitochondrial ATP synthase as heat shock protein hsp60

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Abstract

A 66 kDa protein, denoted P66, not hitherto classified as an integral component of yeast mitochondrial ATPase, is often observed in preparations of this enzyme complex. A physical association exists between P66 and the assembled ATPase complex since both components are coimmunoprecipitated by anti-F 1 β monoclonal antibody. Two recombinant clones expressing proteins immunologically similar to P66 were isolated from a yeast genomic library in λgt11 by screening with a polyclonal anti-holo-ATPase antibody. Based on restriction site mapping and partial nucleotide sequence analysis, both clones encompass the gene encoding the yeast heat shock protein hsp60. The identification of P66 with hsp60, taken together with its demonstrated association with the mitochondrial ATPase complex, is consistent with recent suggestions that hsp60 is involved in assembly of the ATP synthase complex. © 1990.

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Gray, R. E., Grasso, D. G., Maxwell, R. J., Finnegan, P. M., Nagley, P., & Devenish, R. J. (1990). Identification of a 66 KDa protein associated with yeast mitochondrial ATP synthase as heat shock protein hsp60. FEBS Letters, 268(1), 265–268. https://doi.org/10.1016/0014-5793(90)81024-I

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