Reference: Maccecchini ML, et al. (1979) Transport of proteins across the mitochondrial outer membrane. A precursor form of the cytoplasmically made intermembrane enzyme cytochrome c peroxidase. J Biol Chem 254(16):7468-71

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Abstract


Cytochrome c peroxidase, a cytoplasmically made enzyme located between the inner and outer membrane of yeast mitochondria, is synthesized as larger precursor in a reticulocyte cell-free lysate as well as in pulsed yeast spheroplasts. When the pulsed spheroplasts are chased, the precursor is converted to the mature apoprotein. When the in vitro synthesized precursor is incubated with isolated yeast mitochondria in the absence of protein synthesis, it is cleaved to the mature form; the mature form co-sediments with the mitochondria and is resistant to externally added proteases. These results, in conjunction with those reported earlier (Maccecchini, M.-L., Rudin, Y., Blobel, G., and Schatz, G. (1979) Proc. Natl. Acad. Sci. U.S.A. 76, 343-347) suggest that the mechanism of protein transport into the mitochondrial intermembrane space is quite similar to that of protein transport into the matrix or the inner membrane.

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Journal Article
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Maccecchini ML, Rudin Y, Schatz G
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