1
|
Zhang Y, Chen Y, Gucek M, Xu H. The mitochondrial outer membrane protein MDI promotes local protein synthesis and mtDNA replication. EMBO J 2016; 35:1045-57. [PMID: 27053724 DOI: 10.15252/embj.201592994] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Accepted: 03/01/2016] [Indexed: 12/21/2022] Open
Abstract
Early embryonic development features rapid nuclear DNA replication cycles, but lacks mtDNA replication. To meet the high-energy demands of embryogenesis, mature oocytes are furnished with vast amounts of mitochondria and mtDNA However, the cellular machinery driving massive mtDNA replication in ovaries remains unknown. Here, we describe a Drosophila AKAP protein, MDI that recruits a translation stimulator, La-related protein (Larp), to the mitochondrial outer membrane in ovaries. The MDI-Larp complex promotes the synthesis of a subset of nuclear-encoded mitochondrial proteins by cytosolic ribosomes on the mitochondrial surface. MDI-Larp's targets include mtDNA replication factors, mitochondrial ribosomal proteins, and electron-transport chain subunits. Lack of MDI abolishes mtDNA replication in ovaries, which leads to mtDNA deficiency in mature eggs. Targeting Larp to the mitochondrial outer membrane independently of MDI restores local protein synthesis and rescues the phenotypes of mdi mutant flies. Our work suggests that a selective translational boost by the MDI-Larp complex on the outer mitochondrial membrane might be essential for mtDNA replication and mitochondrial biogenesis during oogenesis.
Collapse
Affiliation(s)
- Yi Zhang
- Laboratory of Molecular Genetics, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Yong Chen
- Proteomics Core, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Marjan Gucek
- Proteomics Core, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Hong Xu
- Laboratory of Molecular Genetics, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| |
Collapse
|
2
|
Nicolau A, Mota M, Lima N. Effect of different toxic compounds on ATP content and acid phosphatase activity in axenic cultures of Tetrahymena pyriformis. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2004; 57:129-135. [PMID: 14759658 DOI: 10.1016/j.ecoenv.2003.10.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2002] [Revised: 09/16/2003] [Accepted: 10/08/2003] [Indexed: 05/24/2023]
Abstract
The sensitivity of protozoa, and particularly ciliated protozoa, to environmental changes suggested a study on the physiological responses arising from exposure to toxic compounds. Tetrahymena pyriformis was used as a test organism in a set of miniaturized assays. The physiological response of this ciliate was assessed in terms of adenosine-5'-triphosphate content and acid phosphatase activity after exposure of the cultures of T. pyriformis to four toxicants: copper, zinc, Triton X-100, and cycloheximide. In the range of concentrations used, stimulation and inhibition of these two parameters were observed. The correlation between the two parameters is analyzed.
Collapse
Affiliation(s)
- Ana Nicolau
- Centro de Engenharia Biológica, Universidade do Minho, Campus de Gualtar, Braga 4710-057, Portugal
| | | | | |
Collapse
|
3
|
Ebringer L. Interaction of drugs with extranuclear genetic elements and its consequences. TERATOGENESIS, CARCINOGENESIS, AND MUTAGENESIS 1990; 10:477-501. [PMID: 1982911 DOI: 10.1002/tcm.1770100606] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Bacterial ancestry of mitochondria and plastids is now generally accepted. Both organelles contain their own DNA and transcription-translation apparatus of a prokaryotic type. Due to this fact these systems carry bacteria-like properties. Thus organellar DNA and ribosomes are essentially different from nuclear DNA and cytoplasmic ribosomes in physical as well as in functional respects. Due to the bacterial character of both types of organelles they are susceptible to various antibacterial chemicals. Inhibitors of bacterial protein synthesis inhibit mitochondrial (plastidial) biogenesis. Therefore the cellular content of mitochondria (plastids)-made proteins decreases during cytoplasmic turnover or cell division in the presence of these drugs. Such drug activity consequently leads to a reduced capacity for oxidative phosphorylation or photosynthesis. Organellar genomes are less stable and more sensitive to mutagenesis as compared to nuclear genome. It means also that genotoxic agents induce various disorders of mitochondrial (plastidial) functions. Impairments in the respiratory chain are associated with structural as well as functional abnormalities of mitochondria. These are clinically expressed mostly in tissues with a high demand for ATP: brain, heart, skeletal muscle, and retina. On the other hand, some antibacterial inhibitors of mitochondrial biogenesis (e.g., tetracyclines) inhibit selectively tumor cell proliferation. Therefore they may be considered for use in anticancer therapy. The article summarizes the response of mitochondria and plastids in various organisms to drugs and environmental xenobiotics. Various model organisms suitable for detection of xenobiotic effect on mitochondria (plastids) are presented as well as the possible consequences of such interaction.
Collapse
Affiliation(s)
- L Ebringer
- Institute of Molecular and Subcellular Biology, Comenius University, Bratislava, Czechoslovakia
| |
Collapse
|
4
|
Nilsson JR. Tetrahymena in Cytotoxicology: with special reference to effects of heavy metals and selected drugs. Eur J Protistol 1989. [DOI: 10.1016/s0932-4739(89)80074-4] [Citation(s) in RCA: 84] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
|
5
|
Curgy JJ, Perasso R, Boissonneau E, Iftode F, Stelly N, Andre J. The mitoribosomes of a chloramphenicol-resistant cytoplasmic mutant of Tetrahymnea pyriformis differ from those of the wild strain. Curr Genet 1981; 4:121-30. [PMID: 24185957 DOI: 10.1007/bf00365690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/1981] [Indexed: 10/26/2022]
Abstract
The spontaneous CAP-resistant mutant, STR1, has been isolated from the sensitive St-strain of Tetrahymena pyriformis (Curgy et al., Biologie Cellulaire 37, 51-60, 1980; Perasso et al., Biologie Cellulaire 37, 45-50, 1980). The goal of the present work is to disclose if the resistance character is due to a modification in the mitoribosomes and if the CAP-treatment induces changes in their abundance and in their physico-chemical properties.The results show that the resistance character of the mutant is due to a reduced affinity of its mitoribosomes for CAP. This difference can be explained by modifications of at least one protein which is probably coded for by the mitochondrial genome.The mitoribosomes from CAP-treated sensitive cells tend to dissociate into their subunits and the electrophoretic pattern of their proteins suggests that at least two mitoribosomal proteins are necessary to bound the two subunits together. These proteins are probably translated in mitochondria.Finally, the CAP-treatment induces a decrease of the abundance of mitoribosomes in the sensitive cells whereas it induced an increase in the resistant cells. The latter change can be regarded as a regulatory mechanism owing to which a loss of efficiency of the mitoribosomes is compensated by their enlarged abundance.
Collapse
Affiliation(s)
- J J Curgy
- Laboratoire de Biologie Cellulaire 4, Université Paris XI, Bâtiment 444, 91405, Orsay-Cedex, France
| | | | | | | | | | | |
Collapse
|
6
|
Beale G, Tait A. Mitochondrial Genetics of Paramecium aurelia. INTERNATIONAL REVIEW OF CYTOLOGY 1981. [DOI: 10.1016/s0074-7696(08)61181-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
|
7
|
Vaudaux PE, Williams NE. Cytoskeletal proteins of the cell surface in Tetrahymena. II. Turnover of major proteins. Exp Cell Res 1979; 123:321-31. [PMID: 499361 DOI: 10.1016/0014-4827(79)90474-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
8
|
Ray DB, Butow RA. Regulation of mitochondrial ribosomal RNA synthesis in yeast. II. Effects of temperature sensitive mutants defective in cytoplasmic protein synthesis. MOLECULAR & GENERAL GENETICS : MGG 1979; 173:239-47. [PMID: 384148 DOI: 10.1007/bf00268634] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
9
|
Craig SP, Innis MA. Mitochondrial regulation in sea urchins. III. Rapid degradation of mitochondrial RNA in association with a failure to form mitochondrial polyribosomes in eggs activated with ionophore A 23187. Exp Cell Res 1978; 117:145-53. [PMID: 363437 DOI: 10.1016/0014-4827(78)90437-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
10
|
Freyssinet G. Determination of the site of synthesis of some Euglena cytoplasmic and chloroplast ribosomal proteins. Exp Cell Res 1978; 115:207-19. [PMID: 98335 DOI: 10.1016/0014-4827(78)90418-4] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
11
|
Innis MA, Craig SP. Mitochondrial regulation in sea urchins. II. Formation of polyribosomes within the mitochondria of 4-8 cell stage embryos of the sea urchin. Exp Cell Res 1978; 111:223-30. [PMID: 627230 DOI: 10.1016/0014-4827(78)90164-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|
12
|
Aomine M. The mechanism of sugar uptake in Tetrahymena pyriformis—II. Effects of various inhibitors and chemical modificators. ACTA ACUST UNITED AC 1978. [DOI: 10.1016/0300-9629(78)90183-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
13
|
|
14
|
Dentler WL, Cunningham WP. Structure and organization of radial spokes in cilia of Tetrahymena pyriformis. J Morphol 1977; 153:143-51. [PMID: 408499 DOI: 10.1002/jmor.1051530110] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The structure and organization of radial spokes, the principal components between each of the peripheral doublet microtubules and the central sheath which surrounds the central pair of microtubules have been described in Tetrahymena pyriformis cilia. The radial spokes are grouped in triplets and are attached to the A-microtubule of each peripheral doublet at intervals of 200/280/360 A, the 200 A spacing being most distal to the base of the cilium. The radial spoke triplets are organized in the axoneme in a double helix with a pitch of 4,680 A. A method for determining the helical disposition by correcting for doublet sliding is presented.
Collapse
|
15
|
Satav JG, Katyare SS, Fatterparker P, Sreenivasan A. Study of protein synthesis in rat liver mitochondria use of cycloheximide. EUROPEAN JOURNAL OF BIOCHEMISTRY 1977; 73:287-96. [PMID: 837942 DOI: 10.1111/j.1432-1033.1977.tb11318.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
1. The effects of short-term and long-term administration of cyclohexidine on rat liver mitochondrial protein synthesis have been examined and were found to be different. 2. Long-term administration of cycloheximide resulted in inhibition of total cellular protein synthesis including that of mitochondria while, at short-term intervals, 8-10% of mitochondrial protein synthesis was cycloheximide-resistant. 3. The inhibitory effect was also reflected in terms of protein synthesizing ability of mitochondria in vitro, the inhibition becoming apparent at 40 min and showing progressive increase with time. 4. The observed inhibition of mitochondrial protein synthesis by cycloheximide was not due to either inhibition of energy metabolism or alteration of amino-acid pool. 5. Cycloheximide did not enter mitochondria or sonic preparation under conditions in vitro. On the other hand, after administration of [3H]cycloheximide, significant quantities of the label were found to be associated with mitochondria and mitoribosomes. 6. These results indicated that cycloheximide reached the site of action in mitochondria under conditions in vivo but was unable to do so in vitro. 7. The results are discussed to elucidate the possible mechanisms involved in the inhibition of truly mitochondrial protein synthesis by cyclohexamide.
Collapse
|
16
|
Saccone C, Quagliariello E. Biochemical studies of mitochondrial transcription and translation. INTERNATIONAL REVIEW OF CYTOLOGY 1976; 43:125-65. [PMID: 131112 DOI: 10.1016/s0074-7696(08)60068-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
17
|
Gadaleta MN, Greco M, Del Prete G, Saccone C. On the effect of inhibitors of transcription and translation on RNA and protein synthesis by isolated rat liver mitochondria. Arch Biochem Biophys 1976; 172:238-45. [PMID: 1252078 DOI: 10.1016/0003-9861(76)90072-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
|
18
|
Kidder GW, Dewey VC. Some aspects of the initiation of protein synthesis in Crithidia fasciculata and Tetrahymena pyriformis. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. B, COMPARATIVE BIOCHEMISTRY 1975; 52:537-9. [PMID: 812632 DOI: 10.1016/0305-0491(75)90233-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
|
19
|
Kit S, Leung WC. Effect of chloramphenicol and cycloheximide on the formation of mitochondrial-specific thymidine kinase isozymes in HeLa(BU25) cells. Biochem Biophys Res Commun 1975; 67:1-7. [PMID: 1201012 DOI: 10.1016/0006-291x(75)90274-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
|
20
|
Levy MR. Synthesis of glycolytic and peroxisomal enzymes in Tetrahymena following a change in culture conditions. J Cell Physiol 1975; 85:41-5. [PMID: 803270 DOI: 10.1002/jcp.1040850106] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The specific activity of a peroxisomal enzyme, lactate oxidase, and of pyruvate kinase and lactate dehydrogenase, which are not peroxisomal, increased rapidly when shaken cultures of Tetrahymena were transferred to conditions of oxygen restriction and supplemented with glucose. Two other peroxisomal enzymes, catalase and TPN-linked isocitrate dehydrogenase, did not increase substantially, nor did succinate dehydrogenase. The increases were reduced if glucose was not added at the time of transfer, and were prevented by actinomycin D or cycloheximide, but not by chloramphenicol. The results suggest an involvement of peroxisomes in the metabolism of glycolytic endproducts when the availability of oxygen to the cell is limiting.
Collapse
|
21
|
Rohatgi K, Krawiec S. Some effects of chloramphenicol and ethidium bromide on Tetrahymena pyriformis. THE JOURNAL OF PROTOZOOLOGY 1973; 20:425-30. [PMID: 4354402 DOI: 10.1111/j.1550-7408.1973.tb00915.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
|
22
|
Ibrahim NG, Stuchell RN, Beattie DS. Formation of the yeast mitochondrial membrane. 2. Effects of glucose repression on mitochondrial protein synthesis. EUROPEAN JOURNAL OF BIOCHEMISTRY 1973; 36:519-27. [PMID: 4581275 DOI: 10.1111/j.1432-1033.1973.tb02938.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|
23
|
Levy MR. Decrease of peroxisomal enzymes in Tetrahymena and its prevention by actinomycin D and cycloheximide. BIOCHIMICA ET BIOPHYSICA ACTA 1973; 304:367-74. [PMID: 4710764 DOI: 10.1016/0304-4165(73)90255-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
|