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MIURA S, MORI M, AMAYA Y, TATIBANA M. A Mitochondria1 Protease that Cleaves the Precursor of Ornithine Carbamoyltransferase. ACTA ACUST UNITED AC 2005. [DOI: 10.1111/j.1432-1033.1982.tb06487.x] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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McIntyre P, Graf L, Mercer J, Peterson G, Hudson P, Hoogenraad N. A highly basic N-terminal extension of the mitochondrial matrix enzyme ornithine transcarbamylase from rat liver. FEBS Lett 2001; 177:41-6. [PMID: 6548714 DOI: 10.1016/0014-5793(84)80977-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
We have deduced the amino acid sequence of the N-terminal leader peptide of the mitochondrial enzyme ornithine transcarbamylase from a cDNA clone obtained from a rat liver cDNA library. The sequence is remarkable in being highly basic, having 4 arginine, 3 lysine and 1 histidine with no acidic residues in a total of 32 residues. The leader sequence has no extensive hydrophobic stretches, has 72% homology with the leader peptide of human ornithine transcarbamylase [1], and in terms of its basic character resembles the N-terminal extensions on a number of fungal mitochondrial [2-5] and pea chloroplast [6] proteins. Thus the basic nature of these leader peptides may constitute the signal for mitochondrial import.
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Wada J, Kanwar YS. Characterization of mammalian translocase of inner mitochondrial membrane (Tim44) isolated from diabetic newborn mouse kidney. Proc Natl Acad Sci U S A 1998; 95:144-9. [PMID: 9419343 PMCID: PMC18154 DOI: 10.1073/pnas.95.1.144] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/1997] [Accepted: 10/29/1997] [Indexed: 02/05/2023] Open
Abstract
Mammalian translocase of mitochondrial inner membrane (mTim44) was isolated during representational difference analysis of cDNA from diabetic mouse kidney. Streptozotocin-induced diabetic mouse kidney cDNA was prepared and subtracted by normal mouse kidney cDNA. By using one of the isolated cDNA fragments as a screening probe, full-length cDNA of mTim44 was isolated from lambdaZAP kidney cDNA library. At the nucleotide level, mTim44 did not exhibit significant homology with any known genes; however, at the amino acid level, it had 50% similarity and 29% identity with yeast Tim44. C-terminal FLAG epitope-tagged mTim44 fusion protein was transiently expressed in COS7 cells. By using anti-FLAG epitope M2 monoclonal antibody, mTim44 was found to have its subcellular localization associated with mitochondria. By immunoelectron microscopy, mTim44 was seen in the paracrystalline structures within the mitochondria, as well as in their cristae. Mitochondrial import assay of in vitro translated mTim44 indicated that its precursor product ( approximately 50 kDa) was imported and proteolytically processed to a mature approximately 44-kDa protein, and its translocation was inner membrane potential (DeltaPsi)-dependent. Imported mTim44 was protected from protease digestion in which outer membranes were selectively permeabilized with digitonin. The mature form of mTim44 could be recovered in the supernatant of sonicated mitochondrial membrane fraction treated with 0.1 M Na2CO3, pH 11.5. The data indicate that mTim44 is a mitochondrial inner membrane protein, one of the members of the mammalian TIM complex and up-regulated in hyperglycemic states.
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Affiliation(s)
- J Wada
- Department of Pathology, Northwestern University Medical School, 303 East Chicago Avenue, Chicago, IL 60611, USA
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Peralta D, Lithgow T, Hoogenraad NJ, Høj PB. Prechaperonin 60 and preornithine transcarbamylase share components of the import apparatus but have distinct maturation pathways in rat liver mitochondria. EUROPEAN JOURNAL OF BIOCHEMISTRY 1993; 211:881-9. [PMID: 8094670 DOI: 10.1111/j.1432-1033.1993.tb17621.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Mitochondrial preornithine transcarbamylase (p-OTC) and premalate dehydrogenase (p-MDH) are the only two matrix-located preproteins so far identified for which the proteolytic processing in vitro requires the formation of genuine processing intermediates, i-OTC and i-MDH, respectively. To establish the processing of other preproteins during import with respect to the two-step processing of p-OTC and p-MDH, the chelators EDTA and 1,10-phenanthroline were used to study the import and processing of rat prechaperonin 60 (p-cpn60) and p-OTC by mitochondria from four cpn60-containing organs. We found no evidence for a secondary processing step in the maturation of p-cpn60, but a clear requirement for two-step processing of p-OTC, even in three organs which do not contain ornithine transcarbamylase. The metal-ion requirement of the p-OTC processing activities in the organelle is consistent with the proposition that the mitochondrial processing protease (MPP) and mitochondrial intermediate peptidase (MIP) activities defined in vitro [Kalousek, F., Hendrick, J.P. & Rosenberg, L. E. (1988) Proc. Natl Acad. Sci. USA 85, 7536-7540] are responsible for precursor processing in vivo. The authenticity of two-step processing in vivo was, furthermore, established by demonstrating that i-OTC accumulates to high levels in Spodoptora frugiperda insect cells supplemented with MnCl2. The inability of the insect cells to process p-OTC fully is not a characteristic of cells grown in culture since cultured rat hepatoma cells process p-OTC to the fully processed m-OTC. Finally, we find that the import and processing of p-cpn60 and p-OTC is inhibited in an identical fashion by presequence-bovine-serum-albumin conjugates. The differences in proteolytic maturation between p-cpn60 and p-OTC are therefore not likely to result from different import pathways as the two precursors compete for common components of the import apparatus.
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Affiliation(s)
- D Peralta
- Department of Biochemistry, La Trobe University, Bundoora, Australia
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Côté C, Poirier J, Boulet D. Role for the mitochondrial inner membrane in the maturation of the precursor to ornithine carbamyl transferase. Biochem Biophys Res Commun 1990; 170:1273-80. [PMID: 2390092 DOI: 10.1016/0006-291x(90)90531-q] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The precursor to ornithine carbamyl transferase (pOCT) is cleaved at two N-terminal sites when imported into intact mitochondria but only at the N-proximal site when incubated with a membrane-free mitochondrial lysate or matrix fraction. Disruption of the mitochondrial membrane system by sonication, freeze-thaw, or lysis with non-ionic detergents blocks the processing of pOCT to its mature form. Mitoplasts prepared from protease-inactivated, import-incompetent mitochondria recover full processing activity; disruption of the inner membrane impairs the maturation process i.e. causes the loss of the mitoplasts' ability to transform pOCT into OCT. The data reveal a dependency of a maturation event on a "specific" interaction between a precursor protein and the mitochondrial inner membrane probably to position and/or to expose the correct N-distal cleavage site of the presequence.
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Affiliation(s)
- C Côté
- Université du Québec à Montréal, Department of Chemistry, Canada
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Gibb GM, Ragan CI. Biosynthetic studies of several of the nuclear-encoded subunits of mammalian NADH dehydrogenase. EUROPEAN JOURNAL OF BIOCHEMISTRY 1989; 182:367-72. [PMID: 2737208 DOI: 10.1111/j.1432-1033.1989.tb14840.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
An investigation into the biogenesis of several of the nuclear-encoded subunits of the iron-protein fragment of mitochondrial NADH dehydrogenase was undertaken utilising a bovine kidney cell line (NBL-1). Inhibition of import was achieved by treating the cells with the uncoupler carbonylcyanide p-trifluoromethoxyphenylhydrazone (FCCP) and it was demonstrated that the 75-kDa, 51-kDa and 49-kDa components of the enzyme were synthesised as larger polypeptides of 76-kDa, 52-kDa and 53-kDa, respectively. The precursors could subsequently be processed to the mature subunits by reversing the FCCP treatment and chasing for 45 min at 37 degrees C. Subcellular localisation studies using the detergent digitonin illustrated that the 76-kDa, 52-kDa and 53-kDa precursor forms were almost exclusively located in the soluble fraction of the cell, whereas the mature and pulse-chased proteins fractionated with the particulate portion of the cell. Although the mature 30-kDa and 24-kDa subunits of NADH dehydrogenase could be visualised, their precursor forms went undetected in this system.
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Affiliation(s)
- G M Gibb
- Department of Biochemistry, University of Southampton, England
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Murakami K, Amaya Y, Takiguchi M, Ebina Y, Mori M. Reconstitution of mitochondrial protein transport with purified ornithine carbamoyltransferase precursor expressed in Escherichia coli. J Biol Chem 1988. [DOI: 10.1016/s0021-9258(19)81377-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Abstract
Ornithine transcarbamylase (OTC), one of the enzymes of the urea cycle, is detectable in some strains of chickens, although they have no functional urea cycle. The enzyme consists of three identical subunits of 36 kd and is present in mitochondria of the kidney. Using immunoabsorbent column chromatography, we found further evidence that the enzyme is detectable as a precursor form (40 kd) in chicken brain, heart, liver, pancreas, gizzard, small intestine, and breast muscle. When an extract of small intestine containing only precursor OTC was treated with a kidney extract, the precursor was converted into OTC. This suggests that there is a tissue-specific processing protease in the kidney which splits a peptide off the precursor, causing the expression of OTC activity in this organ. However, the reason why the enzyme or its precursor is expressed in these organs is not known. The results of this study suggest that, unlike mammals, chickens are more organ specific with regard to the ability to incorporate precursor OTC into mitochondria.
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Ikeda Y, Keese SM, Fenton WA, Tanaka K. Biosynthesis of four rat liver mitochondrial acyl-CoA dehydrogenases: in vitro synthesis, import into mitochondria, and processing of their precursors in a cell-free system and in cultured cells. Arch Biochem Biophys 1987; 252:662-74. [PMID: 3813556 DOI: 10.1016/0003-9861(87)90072-5] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The synthesis, translocation, processing, and assembly of rat liver short chain acyl-CoA, medium chain acyl-CoA, long chain acyl-CoA, and isovaleryl-CoA dehydrogenases were studied. These four acyl-CoA dehydrogenases are homotetrameric flavoproteins which are located in the mitochondrial matrix. They were synthesized in a cell-free rabbit reticulocyte lysate system, programmed by rat liver polysomal RNA, as precursor polypeptides which are 2-4 kDa larger than their corresponding mature subunits (Mr 41,000-45,000). When the radiolabeled precursors were incubated with intact rat liver mitochondria, they appeared to bind tightly to the mitochondrial outer membrane. At this stage they were completely susceptible to the action of exogenous trypsin. The precursors bound to mitochondria at 0 degrees C were translocated into the mitochondria and processed when the temperature was raised to 30 degrees C. No reaction occurred when the temperature was kept at 0 degrees C, however, suggesting that the binding of the precursors is temperature independent while the subsequent steps of the pathway are energy dependent. Indeed, the translocation reaction was inhibited by compounds such as dinitrophenol and rhodamine 6G which inhibit mitochondrial energy metabolism. The newly imported (mature) enzymes were inaccessible to the proteolytic action of added trypsin. The processing of the precursors to mature subunits was proteolytically carried out in the mitochondrial matrix, and the processed mature subunits mostly assembled to their respective tetrameric forms. Newly synthesized larger precursors of each of the four acyl-CoA dehydrogenases were recovered from intact, cultured Buffalo rat liver cells in the presence of dinitrophenol. When dinitrophenol was removed in a pulse-chase protocol, the accumulated precursors were rapidly (t1/2 3-5 min) converted to their corresponding mature subunits. On the other hand, when the chase was performed in the presence of the inhibitor, the labeled precursors disappeared with t1/2 of greater than 4 h for long chain acyl-CoA dehydrogenase and 1-2 h for the other three enzyme precursors.
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Lingelbach KR, Graf LJ, Dunn AR, Hoogenraad NJ. Effect of deletions within the leader peptide of pre-ornithine transcarbamylase on mitochondrial import. EUROPEAN JOURNAL OF BIOCHEMISTRY 1986; 161:19-23. [PMID: 3780735 DOI: 10.1111/j.1432-1033.1986.tb10119.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The uptake of the cytoplasmically synthesized mammalian enzyme, ornithine transcarbamylase, into mitochondria is directed by an N-terminal peptide of 32 amino acids. We have investigated some of the structural requirements for the import of the enzyme from rat liver into isolated mitochondria and into mitochondria of COS cells transfected with cDNA encoding the precursor form of ornithine transcarbamylase. Deletion of 21 amino acids from the N terminus of the leader peptide blocked the import of the precursor; deletion of 5 amino acids at positions 15-19 from the N terminus of the leader peptide had no deleterious effect on the import of the enzyme, nor on the processing and assembly of subunits in mitochondria. The region deleted contained three of eight basic residues in the leader peptide suggesting that specific structural elements containing basic residues, rather than the general basic nature of the leader, may be involved in mitochondrial import.
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Mori M, Miura S, Morita T, Takiguchi M, Tatibana M. Synthesis, intracellular transport and processing of mitochondrial urea cycle enzymes. ACTA ACUST UNITED AC 1986; 21:121-32. [PMID: 6545081 DOI: 10.1016/0065-2571(83)90011-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Carbamyl phosphate synthetase I and ornithine transcarbamylase are matrix enzymes synthesized outside the mitochondria in the form of larger precursors and are transported rapidly into mitochondria, in association with post-translational proteolytic processing to the mature enzymes. Treatment of isolated rat hepatocytes with 40 micrograms/ml of rhodamine 123 resulted both in a potent inhibition of the processing of the enzyme precursors and in accumulation of the precursors. In pulse-chase experiments, the labeled precursor disappeared much more slowly in the presence of the dye. Rhodamine 123 strongly inhibited the uptake and processing of the ornithine transcarbamylase precursor by isolated rat liver mitochondria. Other positively charged rhodamines such as rhodamines 6G and 6GX were also strongly inhibitory. On the other hand, rhodamine B which has no net charge was much less inhibitory. These results suggest that the positively charged rhodamines inhibit the binding of the positively charged enzyme precursors to a negatively charged protein(s) or to phospholipids of the mitochondrial outer membrane. Potassium and magnesium ions, and probably a cytosolic protein(s), were required for the maximal uptake and processing of the ornithine transcarbamylase precursor by the isolated mitochondria. The concentrations of potassium and magnesium ions required for the maximal transport and processing were about 120 mM and 0.8-1.6 mM, respectively. Dialyzed postribosomal supernatant of rabbit reticulocyte lysate (36-72 mg protein/ml), in combination with potassium and magnesium ions, stimulated the precursor transport and processing 3- to 4-fold. The stimulatory activity of the dialyzed lysate was inactivated by trypsin treatment or heat treatment. No significant amount of the enzyme precursor was associated with the mitochondria when incubation was performed in the absence of these compounds. All these results indicate that potassium and magnesium ions, and probably a cytosolic protein(s), are required for the binding of the ornithine transcarbamylase precursor to the mitochondria or its transport into the organelle.
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Belbekouche M, Gautier C, Vaillant R. Changes in ornithine transcarbamylase activity and protein level during perinatal period in rat liver. Effects of actinomycin D. Biochem Biophys Res Commun 1985; 129:780-8. [PMID: 3925950 DOI: 10.1016/0006-291x(85)91960-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Ornithine transcarbamylase activity and immunoreactive enzyme level are compared during perinatal period and in adult rat. Ornithine transcarbamylase activity regularly rises during late fetal period and presents a marked increase 24 hours after birth. Immunoreactive enzyme level does not correlate with this developmental pattern. Ornithine transcarbamylase level increases from 0.06 mg on day 19.5 of pregnancy to 0.417 mg/g liver on day 21.5 and remains constant after birth (0.418 mg/g liver). These results suggest that inactive mitochondrial ornithine transcarbamylase accumulates before birth and that the postnatal increase in enzyme activity is mainly associated with an activation. Furthermore, the paradoxical effect of actinomycin D on ornithine transcarbamylase activity is associated with an increase in enzyme level (about 25%).
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Côté C, Boulet D. Differential import and processing of the precursors to F1-ATPase beta-subunit and ornithine carbamyltransferase by liver, spleen, heart and kidney mitochondria. Biochem Biophys Res Commun 1985; 129:240-7. [PMID: 2860903 DOI: 10.1016/0006-291x(85)91428-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The cytoplasmically made subunits 2 (beta) and 3 (gamma) of the H+-ATPase from mammalian mitochondria are synthesized in vitro as larger polypeptides. In contrast, pre-cytochrome c could not, on the basis of its molecular weight, be distinguished from the mature polypeptide. This was shown by programming a reticulocyte lysate with rat heart RNA and immunoprecipitating the labeled translation products with polypeptide-specific antibodies. When a translated lysate containing the precursor to the beta-subunit was incubated with isolated rat spleen mitochondria, it was converted to the mature subunit and was no longer susceptible to externally added trypsin. The conversion to the mature form occurred in the absence of protein synthesis. This post-translational maturation process of the beta-subunit was more efficient when carried out with spleen or liver mitochondria than with heart or kidney mitochondria. The converse relative efficiency was observed when the processing of the precursor to ornithine carbamyltransferase by these mitochondria was examined. These results indicate that mitochondria do not discriminate against tissue-specific mitochondrial proteins. In addition, the observed varying degrees of efficiency of mitochondria from different tissues in importing and processing these two precursors suggest that the activity of precursor(s)-specific translocation-maturation systems varies between different types of mitochondria.
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Mori M, Matsue H, Miura S, Tatibana M, Hashimoto T. Transport of proteins into mitochondrial matrix. Evidence suggesting a common pathway for 3-ketoacyl-CoA thiolase and enzymes having presequences. EUROPEAN JOURNAL OF BIOCHEMISTRY 1985; 149:181-6. [PMID: 2859988 DOI: 10.1111/j.1432-1033.1985.tb08909.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Rat liver 3-ketoacyl-CoA thiolase, a mitochondrial matrix enzyme which catalyzes a step of fatty acid beta-oxidation, was synthesized in a rabbit reticulocyte lysate cell-free system. The in vitro product was apparently the same in molecular size and charge as the subunit of the mature enzyme. The enzyme synthesized in vitro was transported into isolated rat liver mitochondria in an energy-dependent manner. In pulse experiments with isolated rat hepatocytes at 37 degrees C, the radioactivity of the newly synthesized enzyme in the cytosolic fraction remained essentially unchanged during 5-20 min of incubation, whereas that of the enzyme in the particulate fraction increased with time during the incubation. The pulse-labeled enzyme disappeared with an apparent half-life of less than 3 min from the cytosolic fraction, in pulse-chase experiments. Purified 3-ketoacyl-CoA thiolase inhibited the mitochondrial uptake and processing of the precursors of the other matrix enzymes, ornithine carbamoyltransferase, medium-chain acyl-CoA dehydrogenase and acetoacetyl-CoA thiolase. These results indicate that 3-ketoacyl-CoA thiolase has an internal signal which is recognized by the mitochondria and suggest that this enzyme and the three others are transported into the mitochondria by a common pathway.
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Reid GA. Chapter 7 Transport of Proteins into Mitochondria. ACTA ACUST UNITED AC 1985. [DOI: 10.1016/s0070-2161(08)60329-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
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Repression of rat kidney L-arginine:glycine amidinotransferase synthesis by creatine at a pretranslational level. J Biol Chem 1984. [DOI: 10.1016/s0021-9258(20)71316-5] [Citation(s) in RCA: 66] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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McIntyre P, Mercer JF, Peterson MG, Hudson P, Hoogenraad N. Selection of a cDNA clone which contains the complete coding sequence for the mature form of ornithine transcarbamylase from rat liver: expression of the cloned protein in Escherichia coli. Molecular cloning of rat ornithine transcarbamylase. EUROPEAN JOURNAL OF BIOCHEMISTRY 1984; 143:183-7. [PMID: 6205873 DOI: 10.1111/j.1432-1033.1984.tb08357.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A cDNA clone corresponding to the mature form of ornithine transcarbamylase (OTCase) was selected from a rat liver cDNA library constructed in bacteriophage lambda gt10. OTCase clones were selected using a synthetic DNA probe of 15 bases corresponding to the 3' end of the OTCase mRNA [Horwich, A. L., Kraus, J.P., Williams, K., Kalousek, F., Königsberg, W. & Rosenberg, L.E. (1983) Proc. Natl Acad. Sci. USA, 80, 4258-4262]. Putative OTCase clones were subcloned into the expression vector, pUC9, and the identity of inserts confirmed by colony immunoassay and by electrophoretic transfer of cloned proteins from sodium dodecyl sulphate/polyacrylamide gels to nitrocellulose filters followed by probing with monospecific anti-OTCase antibodies and 125I-labelled protein A. A clone corresponding to the full-length mature form of rat liver OTCase (plus 15 amino acids from Escherichia coli beta-galactosidase) was obtained and the identity of the clone was confirmed by comparison of the 5' sequence with a limited N-terminal amino acid sequence [Lusty, C., Jilka, R. L. & Nietsch, E. H. (1979) J. Biol. Chem. 254, 10030-10036]. A sequence discrepancy between the published sequence (Lusty et al.) and the sequence predicted from the cDNA structure is noted.
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Kalousek F, Orsulak MD, Rosenberg LE. Newly processed ornithine transcarbamylase subunits are assembled to trimers in rat liver mitochondria. J Biol Chem 1984. [DOI: 10.1016/s0021-9258(18)91020-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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22
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Transport of ADP/ATP carrier into mitochondria. Precursor imported in vitro acquires functional properties of the mature protein. J Biol Chem 1984. [DOI: 10.1016/s0021-9258(17)43120-6] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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23
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Chien SM, Freeman KB. Import of rat liver mitochondrial malate dehydrogenase. Synthesis, transport, and processing in vitro of its precursor. J Biol Chem 1984. [DOI: 10.1016/s0021-9258(17)43299-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Felipo V, Grisolía S. Transport and regulation of polypeptide precursors of mature mitochondrial proteins. CURRENT TOPICS IN CELLULAR REGULATION 1984; 23:217-49. [PMID: 6373163 DOI: 10.1016/b978-0-12-152823-2.50010-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Doonan S, Marra E, Passarella S, Saccone C, Quagliariello E. Transport of proteins into mitochondria. INTERNATIONAL REVIEW OF CYTOLOGY 1984; 91:141-86. [PMID: 6094381 DOI: 10.1016/s0074-7696(08)61316-9] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
There is still much that is obscure concerning the transport of proteins into or through the mitochondrial membrane systems. In addition, as pointed out previously, it is unlikely that the details of the process are the same for proteins destined for different compartments of the organelle. A brief summary of the process for matrix proteins might be as follows: The proteins are synthesized on free polysomes as precursors of higher molecular weight than the native forms. These precursors are liberated into the cell cytosol and subsequently translocated into the mitochondria. This timing might be different in yeast under some circumstances, synthesis being completed in association with the mitochondria. The precursors interact with a receptor in the outer mitochondrial membrane interaction being mediated by the presequences of the precursors. The presequences therefore act as addressing signals as well as possibly playing a role in one or all of (a) solubilization of precursors, (b) prevention of premature assembly into multimeric structures, or (c) maintenance of nonnative configurations required for transport. Interaction occurs with a second receptor, this time in the inner membrane of the mitochondria, interaction being with multiple sites in the polypeptide chain. Transport across the inner membrane then occurs, this transport depending on a transmembrane electrochemical gradient of which the proton component is the essential part. Transport is accompanied or followed by proteolysis of the prepiece, and formation of the native structure. While steps 1 and 2 of this sequence can be considered well established, the remaining steps are still poorly understood or purely hypothetical. Nevertheless, this sequence of events is consistent with known facts about the process and provides a framework for future investigations.
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Briand P, Miura S, Mori M, Cathelineau L, Kamoun P, Tatibana M. Cell-free synthesis and transport of precursors of mutant ornithine carbamoyltransferases into mitochondria. BIOCHIMICA ET BIOPHYSICA ACTA 1983; 760:389-97. [PMID: 6626579 DOI: 10.1016/0304-4165(83)90379-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Synthesis, mitochondrial transport and processing of ornithine carbamoyltransferase (EC 2.1.3.3) were studied in mutant mice strains (sparse-fur, spf, and sparse-fur with abnormal skin and hair, spf-ash) which exhibit a deficiency in this enzyme. Spf mice have an increased amount (about 150% of control) of the enzyme with abnormal kinetic properties, whereas spf-ash mice have a decreased amount (about 10% of control) of the enzyme with apparently normal kinetic properties. Precursors of the mutant enzymes were synthesized in a reticulocyte lysate cell-free system. The hepatic level of translatable mRNA coding for the enzyme and the rate of the enzyme synthesis in liver slices of spf mice were 58 and 60% of the controls, respectively. In the case of spf-ash mice the activity of translatable mRNA for the enzyme was 10% of the controls. These results indicate that the decreased amount of ornithine carbamoyltransferase protein in spf-ash mice is due mainly to a decreased level of translatable mRNA for the enzyme, whereas the increase in the enzyme amount in spf mice is presumably the result of a decreased rate of enzyme degradation. The subunit molecular weight of the spf enzyme precursor was practically the same as that of the normal enzyme precursor (Mr 40 000). Both precursors synthesized in vitro could be taken up and processed similarly to an apparently mature form (Mr 37 000). In the case of spf-ash enzyme, two discrete in vitro products were observed on sodium dodecyl sulfate polyacrylamide gel; one comigrated with the normal enzyme precursor and the other moved slightly slower. Both products appeared to be taken up and processed to the mature form of the enzyme.
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Freeman KB, Yatscoff RW, Mason JR, Patel HV, Buckle M. Characterization of a Chinese hamster ovary cell line resistant to uncouplers. EUROPEAN JOURNAL OF BIOCHEMISTRY 1983; 134:215-22. [PMID: 6223814 DOI: 10.1111/j.1432-1033.1983.tb07553.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The chemiosmotic theory of oxidative phosphorylation and the action of uncouplers was examined by characterizing a clone, UH5, of Chinese hamster ovary (CHO TK-) cells resistant to 5-chloro-3-tert-butyl-2'-chloro-4'-nitrosalicylanilide (S-13), a potent uncoupler of oxidative phosphorylation. About 9-times and 4-times more S-13 was required to effect growth and respiration respectively of UH5 cells compared to the parental CHO TK- cells. UH5 cells were cross-resistant to the uncouplers SF-6847 (3,5-di-tert-butyl-4-hydroxy-benzylidenemalononitrile), carbonylcyanide p-trifluoromethoxyphenylhydrazone and 2,4-dinitrophenol but not to oligomycin, venturicidin or Tevenel. Size, chromosome number and DNA content indicated that the UH5 cell line was probably pseudotetraploid compared to the parental pseudodiploid CHO TK- cells. Hybrid and cybrid cells formed from crosses of UH5 cells and cytoplasts, respectively, with an uncoupler-sensitive cell line were sensitive to S-13 indicating that resistance is probably nuclear-determined. UH5 cell mitochondria had increased cytochrome oxidase and decreased H+-ATPase activities. A fivefold resistance of oxidative phosphorylation to uncouplers was found at the mitochondrial level with respiration driven by either succinate or ascorbate/N,N,N',N'-tetramethyl-p-phenylenediamine. In contrast, no difference in sensitivity was found to valinomycin between mitochondria from UH5 and CHO TK- cells. The oligomycin-sensitive H+-ATPase activity of UH5 and CHO TK- cell mitochondria was equally stimulated by the uncoupler S-13. Uncoupler-resistant mitochondria would not be expected on the basis of the chemiosmotic theory, and the relation of the results to other modes of coupling is considered.
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Argan C, Lusty CJ, Shore GC. Membrane and cytosolic components affecting transport of the precursor for ornithine carbamyltransferase into mitochondria. J Biol Chem 1983. [DOI: 10.1016/s0021-9258(18)32263-4] [Citation(s) in RCA: 113] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Miura S, Mori M, Tatibana M. Transport of ornithine carbamoyltransferase precursor into mitochondria. Stimulation by potassium ion, magnesium ion, and a reticulocyte cytosolic protein(s). J Biol Chem 1983. [DOI: 10.1016/s0021-9258(18)32264-6] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Miralles V, Felipo V, Hernández-Yago J, Grisolía S. Transport of the precursor for rat liver glutamate dehydrogenase into mitochondria "in vitro". Biochem Biophys Res Commun 1983; 110:499-503. [PMID: 6838533 DOI: 10.1016/0006-291x(83)91177-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Scotto AW, Chang LF, Beattie DS. The characterization and submitochondrial localization of delta-aminolevulinic acid synthase and an associated amidase in rat liver mitochondria using an improved assay for both enzymes. J Biol Chem 1983. [DOI: 10.1016/s0021-9258(18)33223-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Sagara Y, Ito A. In vitro synthesis of monoamine oxidase of rat liver outer mitochondrial membrane. Biochem Biophys Res Commun 1982; 109:1102-7. [PMID: 6188451 DOI: 10.1016/0006-291x(82)91890-3] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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The mitochondrial and cytosolic forms of avian phosphoenolpyruvate carboxykinase (GTP) are encoded by different messenger RNAs. J Biol Chem 1982. [DOI: 10.1016/s0021-9258(18)33518-x] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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36
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Transport of carbamyl phosphate synthetase I and ornithine transcarbamylase into mitochondria. Inhibition by rhodamine 123 and accumulation of enzyme precursors in isolated hepatocytes. J Biol Chem 1982. [DOI: 10.1016/s0021-9258(18)33853-5] [Citation(s) in RCA: 34] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Kolansky DM, Conboy JG, Fenton WA, Rosenberg LE. Energy-dependent translocation of the precursor of ornithine transcarbamylase by isolated rat liver mitochondria. J Biol Chem 1982. [DOI: 10.1016/s0021-9258(18)34355-2] [Citation(s) in RCA: 58] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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38
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Schleyer M, Schmidt B, Neupert W. Requirement of a membrane potential for the posttranslational transfer of proteins into mitochondria. EUROPEAN JOURNAL OF BIOCHEMISTRY 1982; 125:109-16. [PMID: 6213410 DOI: 10.1111/j.1432-1033.1982.tb06657.x] [Citation(s) in RCA: 247] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Posttranslational transfer of most precursor proteins into mitochondria is dependent on energization of the mitochondria. Experiments were carried out to determine whether the membrane potential or the intramitochondrial ATP is the immediate energy source. Transfer in vitro of precursors to the ADP/ATP carrier and to ATPase subunit 9 into isolated Neurospora mitochondria was investigated. Under conditions where the level of intramitochondrial ATP was high and the membrane potential was dissipated, import and processing of these precursor proteins did not take place. On the other hand, precursors were taken up and processed when the intramitochondrial ATP level was low, but the membrane potential was not dissipated. We conclude that a membrane potential is involved in the import of those mitochondrial precursor proteins which require energy for intracellular translocation.
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Morita T, Miura S, Mori M, Tatibana M. Transport of the precursor for rat-liver ornithine carbamoyltransferase into mitochondria in vitro. EUROPEAN JOURNAL OF BIOCHEMISTRY 1982; 122:501-9. [PMID: 7060587 DOI: 10.1111/j.1432-1033.1982.tb06465.x] [Citation(s) in RCA: 39] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Mori M, Miura S, Morita T, Tatibana M. Synthesis and intracellular transport of mitochondrial carbamyl phosphate synthetase I and ornithine transcarbamylase. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 1982; 153:267-76. [PMID: 7164902 DOI: 10.1007/978-1-4757-6903-6_33] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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