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. 1987 Jul;6(7):2117–2122. doi: 10.1002/j.1460-2075.1987.tb02478.x

Disruption of the outer membrane restores protein import to trypsin-treated yeast mitochondria.

M Ohba 1, G Schatz 1
PMCID: PMC553603  PMID: 3308451

Abstract

Treatment of isolated yeast mitochondria with high levels (1 mg/ml) of trypsin severely inhibits protein import but does not destroy the integrity of the outer membrane or abolish mitochondrial energy coupling. If the outer membrane of these trypsin-inactivated mitochondria is disrupted by osmotic shock, the resulting mitoplasts are again able to import proteins. Protein import into mitoplasts, like that into intact mitochondria, is energy-dependent; however, whereas import into mitochondria is inhibited by antibody against 45-kd proteins of the outer membrane [Ohba and Schatz, EMBO J., 6, 2109-2115 (1987)], import into mitoplasts not affected by this antibody. Protein import into mitoplasts appears to bypass one or more steps normally occurring at the mitochondrial surface.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. Daum G., Böhni P. C., Schatz G. Import of proteins into mitochondria. Cytochrome b2 and cytochrome c peroxidase are located in the intermembrane space of yeast mitochondria. J Biol Chem. 1982 Nov 10;257(21):13028–13033. [PubMed] [Google Scholar]
  2. Daum G., Gasser S. M., Schatz G. Import of proteins into mitochondria. Energy-dependent, two-step processing of the intermembrane space enzyme cytochrome b2 by isolated yeast mitochondria. J Biol Chem. 1982 Nov 10;257(21):13075–13080. [PubMed] [Google Scholar]
  3. Eilers M., Schatz G. Binding of a specific ligand inhibits import of a purified precursor protein into mitochondria. Nature. 1986 Jul 17;322(6076):228–232. doi: 10.1038/322228a0. [DOI] [PubMed] [Google Scholar]
  4. Greenawalt J. W. Survey and update of outer and inner mitochondrial membrane separation. Methods Enzymol. 1979;55:88–98. doi: 10.1016/0076-6879(79)55012-5. [DOI] [PubMed] [Google Scholar]
  5. Hackenbrock C. R. Chemical and physical fixation of isolated mitochondria in low-energy and high-energy states. Proc Natl Acad Sci U S A. 1968 Oct;61(2):598–605. doi: 10.1073/pnas.61.2.598. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. Haid A., Suissa M. Immunochemical identification of membrane proteins after sodium dodecyl sulfate-polyacrylamide gel electrophoresis. Methods Enzymol. 1983;96:192–205. doi: 10.1016/s0076-6879(83)96017-2. [DOI] [PubMed] [Google Scholar]
  7. Hase T., Müller U., Riezman H., Schatz G. A 70-kd protein of the yeast mitochondrial outer membrane is targeted and anchored via its extreme amino terminus. EMBO J. 1984 Dec 20;3(13):3157–3164. doi: 10.1002/j.1460-2075.1984.tb02274.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Hay R., Böhni P., Gasser S. How mitochondria import proteins. Biochim Biophys Acta. 1984 Jan 27;779(1):65–87. doi: 10.1016/0304-4157(84)90004-2. [DOI] [PubMed] [Google Scholar]
  9. Hurt E. C., Pesold-Hurt B., Schatz G. The cleavable prepiece of an imported mitochondrial protein is sufficient to direct cytosolic dihydrofolate reductase into the mitochondrial matrix. FEBS Lett. 1984 Dec 10;178(2):306–310. doi: 10.1016/0014-5793(84)80622-5. [DOI] [PubMed] [Google Scholar]
  10. Hurt E. C., Pesold-Hurt B., Suda K., Oppliger W., Schatz G. The first twelve amino acids (less than half of the pre-sequence) of an imported mitochondrial protein can direct mouse cytosolic dihydrofolate reductase into the yeast mitochondrial matrix. EMBO J. 1985 Aug;4(8):2061–2068. doi: 10.1002/j.1460-2075.1985.tb03892.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  11. Kellems R. E., Allison V. F., Butow R. A. Cytoplasmic type 80S ribosomes associated with yeast mitochondria. IV. Attachment of ribosomes to the outer membrane of isolated mitochondria. J Cell Biol. 1975 Apr;65(1):1–14. doi: 10.1083/jcb.65.1.1. [DOI] [PMC free article] [PubMed] [Google Scholar]
  12. Ohba M., Schatz G. Protein import into yeast mitochondria is inhibited by antibodies raised against 45-kd proteins of the outer membrane. EMBO J. 1987 Jul;6(7):2109–2115. doi: 10.1002/j.1460-2075.1987.tb02477.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  13. Riezman H., Hay R., Gasser S., Daum G., Schneider G., Witte C., Schatz G. The outer membrane of yeast mitochondria: isolation of outside-out sealed vesicles. EMBO J. 1983;2(7):1105–1111. doi: 10.1002/j.1460-2075.1983.tb01553.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  14. Riezman H., Hay R., Witte C., Nelson N., Schatz G. Yeast mitochondrial outer membrane specifically binds cytoplasmically-synthesized precursors of mitochondrial proteins. EMBO J. 1983;2(7):1113–1118. doi: 10.1002/j.1460-2075.1983.tb01554.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  15. Schleyer M., Neupert W. Transport of proteins into mitochondria: translocational intermediates spanning contact sites between outer and inner membranes. Cell. 1985 Nov;43(1):339–350. doi: 10.1016/0092-8674(85)90039-x. [DOI] [PubMed] [Google Scholar]
  16. Sims P. J., Waggoner A. S., Wang C. H., Hoffman J. F. Studies on the mechanism by which cyanine dyes measure membrane potential in red blood cells and phosphatidylcholine vesicles. Biochemistry. 1974 Jul 30;13(16):3315–3330. doi: 10.1021/bi00713a022. [DOI] [PubMed] [Google Scholar]
  17. Zwizinski C., Schleyer M., Neupert W. Proteinaceous receptors for the import of mitochondrial precursor proteins. J Biol Chem. 1984 Jun 25;259(12):7850–7856. [PubMed] [Google Scholar]
  18. Zwizinski C., Schleyer M., Neupert W. Transfer of proteins into mitochondria. Precursor to the ADP/ATP carrier binds to receptor sites on isolated mitochondria. J Biol Chem. 1983 Apr 10;258(7):4071–4074. [PubMed] [Google Scholar]

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