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Veloso Ribeiro Franco L, Barros MH. Biolistic transformation of the yeast Saccharomyces cerevisiae mitochondrial DNA. IUBMB Life 2023; 75:972-982. [PMID: 37470229 DOI: 10.1002/iub.2769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Accepted: 06/23/2023] [Indexed: 07/21/2023]
Abstract
The insertion of genes into mitochondria by biolistic transformation is currently only possible in the yeast Saccharomyces cerevisiae and the algae Chlamydomonas reinhardtii. The fact that S. cerevisiae mitochondria can exist with partial (ρ- mutants) or complete deletions (ρ0 mutants) of mitochondrial DNA (mtDNA), without requiring a specific origin of replication, enables the propagation of exogenous sequences. Additionally, mtDNA in this organism undergoes efficient homologous recombination, making it well-suited for genetic manipulation. In this review, we present a summarized historical overview of the development of biolistic transformation and discuss iconic applications of the technique. We also provide a detailed example on how to obtain transformants with recombined foreign DNA in their mitochondrial genome.
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Affiliation(s)
| | - Mario H Barros
- Department of Microbiology, Institute of Biomedical Sciences, Universidade de Sao Paulo, Sao Paulo, Brazil
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2
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ATP synthase interactome analysis identifies a new subunit l as a modulator of permeability transition pore in yeast. Sci Rep 2023; 13:3839. [PMID: 36882574 PMCID: PMC9992712 DOI: 10.1038/s41598-023-30966-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Accepted: 03/03/2023] [Indexed: 03/09/2023] Open
Abstract
The mitochondrial ATP synthase, an enzyme that synthesizes ATP and is involved in the formation of the mitochondrial mega-channel and permeability transition, is a multi-subunit complex. In S. cerevisiae, the uncharacterized protein Mco10 was previously found to be associated with ATP synthase and referred as a new 'subunit l'. However, recent cryo-EM structures could not ascertain Mco10 with the enzyme making questionable its role as a structural subunit. The N-terminal part of Mco10 is very similar to k/Atp19 subunit, which along with subunits g/Atp20 and e/Atp21 plays a major role in stabilization of the ATP synthase dimers. In our effort to confidently define the small protein interactome of ATP synthase we found Mco10. We herein investigate the impact of Mco10 on ATP synthase functioning. Biochemical analysis reveal in spite of similarity in sequence and evolutionary lineage, that Mco10 and Atp19 differ significantly in function. The Mco10 is an auxiliary ATP synthase subunit that only functions in permeability transition.
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3
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Chen J, Zang Y, Liang S, Xue S, Shang S, Zhu M, Wang Y, Tang X. Comparative analysis of mitochondrial genomes reveals marine adaptation in seagrasses. BMC Genomics 2022; 23:800. [PMID: 36463111 PMCID: PMC9719629 DOI: 10.1186/s12864-022-09046-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Accepted: 11/24/2022] [Indexed: 12/07/2022] Open
Abstract
BACKGROUND Seagrasses are higher marine flowering plants that evolved from terrestrial plants, but returned to the sea during the early evolution of monocotyledons through several separate lineages. Thus, they become a good model for studying the adaptation of plants to the marine environment. Sequencing of the mitochondrial (mt) genome of seagrasses is essential for understanding their evolutionary characteristics. RESULTS In this study, we sequenced the mt genome of two endangered seagrasses (Zostera japonica and Phyllospadix iwatensis). These data and data on previously sequenced mt genomes from monocotyledons provide new evolutionary evidence of genome size reduction, gene loss, and adaptive evolution in seagrasses. The mt genomes of Z. japonica and P. iwatensis are circular. The sizes of the three seagrasses (including Zostera marine) that have been sequenced to date are smaller than that of other monocotyledons. Additionally, we found a large number of repeat sequences in seagrasses. The most abundant long repeat sequences were 31-40 bp repeats. Our study also found that seagrass species lost extensive ribosomal protein genes during evolution. The rps7 gene and the rpl16 gene of P. iwatensis are exceptions to this trend. The phylogenetic analysis based on the mt genome strongly supports the previous results. Furthermore, we identified five positive selection genes (atp8, nad3, nad6, ccmFn, and matR) in seagrasses that may be associated with their adaptation to the marine environment. CONCLUSIONS In this study, we sequenced and annotated the mt genomes of Z. japonica and P. iwatensis and compared them with the genome of other monocotyledons. The results of this study will enhance our understanding of seagrass adaptation to the marine environment and can inform further investigations of the seagrass mt genome.
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Affiliation(s)
- Jun Chen
- grid.4422.00000 0001 2152 3263College of Marine Life Sciences, Ocean University of China, Qingdao, Shandong China
| | - Yu Zang
- grid.508334.90000 0004 1758 3791Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, Shandong China
| | - Shuo Liang
- grid.4422.00000 0001 2152 3263College of Marine Life Sciences, Ocean University of China, Qingdao, Shandong China
| | - Song Xue
- grid.4422.00000 0001 2152 3263College of Marine Life Sciences, Ocean University of China, Qingdao, Shandong China
| | - Shuai Shang
- grid.4422.00000 0001 2152 3263College of Marine Life Sciences, Ocean University of China, Qingdao, Shandong China
| | - Meiling Zhu
- grid.4422.00000 0001 2152 3263College of Marine Life Sciences, Ocean University of China, Qingdao, Shandong China
| | - Ying Wang
- grid.4422.00000 0001 2152 3263College of Marine Life Sciences, Ocean University of China, Qingdao, Shandong China ,grid.484590.40000 0004 5998 3072Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao, Shandong China
| | - Xuexi Tang
- grid.4422.00000 0001 2152 3263College of Marine Life Sciences, Ocean University of China, Qingdao, Shandong China ,grid.484590.40000 0004 5998 3072Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao, Shandong China
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4
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Marković A, Tauchmannová K, Šimáková M, Mlejnek P, Kaplanová V, Pecina P, Pecinová A, Papoušek F, Liška F, Šilhavý J, Mikešová J, Neckář J, Houštěk J, Pravenec M, Mráček T. Genetic Complementation of ATP Synthase Deficiency Due to Dysfunction of TMEM70 Assembly Factor in Rat. Biomedicines 2022; 10:276. [PMID: 35203486 PMCID: PMC8869460 DOI: 10.3390/biomedicines10020276] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 01/05/2022] [Accepted: 01/18/2022] [Indexed: 11/17/2022] Open
Abstract
Mutations of the TMEM70 gene disrupt the biogenesis of the ATP synthase and represent the most frequent cause of autosomal recessive encephalo-cardio-myopathy with neonatal onset. Patient tissues show isolated defects in the ATP synthase, leading to the impaired mitochondrial synthesis of ATP and insufficient energy provision. In the current study, we tested the efficiency of gene complementation by using a transgenic rescue approach in spontaneously hypertensive rats with the targeted Tmem70 gene (SHR-Tmem70ko/ko), which leads to embryonic lethality. We generated SHR-Tmem70ko/ko knockout rats expressing the Tmem70 wild-type transgene (SHR-Tmem70ko/ko,tg/tg) under the control of the EF-1α universal promoter. Transgenic rescue resulted in viable animals that showed the variable expression of the Tmem70 transgene across the range of tissues and only minor differences in terms of the growth parameters. The TMEM70 protein was restored to 16-49% of the controls in the liver and heart, which was sufficient for the full biochemical complementation of ATP synthase biogenesis as well as for mitochondrial energetic function in the liver. In the heart, we observed partial biochemical complementation, especially in SHR-Tmem70ko/ko,tg/0 hemizygotes. As a result, this led to a minor impairment in left ventricle function. Overall, the transgenic rescue of Tmem70 in SHR-Tmem70ko/ko knockout rats resulted in the efficient complementation of ATP synthase deficiency and thus in the successful genetic treatment of an otherwise fatal mitochondrial disorder.
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Affiliation(s)
- Aleksandra Marković
- Institute of Physiology, Czech Academy of Sciences, Vídeňská 1083, 142 20 Prague, Czech Republic; (A.M.); (K.T.); (M.Š.); (P.M.); (V.K.); (P.P.); (A.P.); (F.P.); (F.L.); (J.Š.); (J.M.); (J.N.); (J.H.)
- Faculty of Science, Charles University, 128 00 Prague, Czech Republic
| | - Kateřina Tauchmannová
- Institute of Physiology, Czech Academy of Sciences, Vídeňská 1083, 142 20 Prague, Czech Republic; (A.M.); (K.T.); (M.Š.); (P.M.); (V.K.); (P.P.); (A.P.); (F.P.); (F.L.); (J.Š.); (J.M.); (J.N.); (J.H.)
| | - Miroslava Šimáková
- Institute of Physiology, Czech Academy of Sciences, Vídeňská 1083, 142 20 Prague, Czech Republic; (A.M.); (K.T.); (M.Š.); (P.M.); (V.K.); (P.P.); (A.P.); (F.P.); (F.L.); (J.Š.); (J.M.); (J.N.); (J.H.)
| | - Petr Mlejnek
- Institute of Physiology, Czech Academy of Sciences, Vídeňská 1083, 142 20 Prague, Czech Republic; (A.M.); (K.T.); (M.Š.); (P.M.); (V.K.); (P.P.); (A.P.); (F.P.); (F.L.); (J.Š.); (J.M.); (J.N.); (J.H.)
| | - Vilma Kaplanová
- Institute of Physiology, Czech Academy of Sciences, Vídeňská 1083, 142 20 Prague, Czech Republic; (A.M.); (K.T.); (M.Š.); (P.M.); (V.K.); (P.P.); (A.P.); (F.P.); (F.L.); (J.Š.); (J.M.); (J.N.); (J.H.)
| | - Petr Pecina
- Institute of Physiology, Czech Academy of Sciences, Vídeňská 1083, 142 20 Prague, Czech Republic; (A.M.); (K.T.); (M.Š.); (P.M.); (V.K.); (P.P.); (A.P.); (F.P.); (F.L.); (J.Š.); (J.M.); (J.N.); (J.H.)
| | - Alena Pecinová
- Institute of Physiology, Czech Academy of Sciences, Vídeňská 1083, 142 20 Prague, Czech Republic; (A.M.); (K.T.); (M.Š.); (P.M.); (V.K.); (P.P.); (A.P.); (F.P.); (F.L.); (J.Š.); (J.M.); (J.N.); (J.H.)
| | - František Papoušek
- Institute of Physiology, Czech Academy of Sciences, Vídeňská 1083, 142 20 Prague, Czech Republic; (A.M.); (K.T.); (M.Š.); (P.M.); (V.K.); (P.P.); (A.P.); (F.P.); (F.L.); (J.Š.); (J.M.); (J.N.); (J.H.)
| | - František Liška
- Institute of Physiology, Czech Academy of Sciences, Vídeňská 1083, 142 20 Prague, Czech Republic; (A.M.); (K.T.); (M.Š.); (P.M.); (V.K.); (P.P.); (A.P.); (F.P.); (F.L.); (J.Š.); (J.M.); (J.N.); (J.H.)
- Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University and General University Hospital, 128 00 Prague, Czech Republic
| | - Jan Šilhavý
- Institute of Physiology, Czech Academy of Sciences, Vídeňská 1083, 142 20 Prague, Czech Republic; (A.M.); (K.T.); (M.Š.); (P.M.); (V.K.); (P.P.); (A.P.); (F.P.); (F.L.); (J.Š.); (J.M.); (J.N.); (J.H.)
| | - Jana Mikešová
- Institute of Physiology, Czech Academy of Sciences, Vídeňská 1083, 142 20 Prague, Czech Republic; (A.M.); (K.T.); (M.Š.); (P.M.); (V.K.); (P.P.); (A.P.); (F.P.); (F.L.); (J.Š.); (J.M.); (J.N.); (J.H.)
| | - Jan Neckář
- Institute of Physiology, Czech Academy of Sciences, Vídeňská 1083, 142 20 Prague, Czech Republic; (A.M.); (K.T.); (M.Š.); (P.M.); (V.K.); (P.P.); (A.P.); (F.P.); (F.L.); (J.Š.); (J.M.); (J.N.); (J.H.)
| | - Josef Houštěk
- Institute of Physiology, Czech Academy of Sciences, Vídeňská 1083, 142 20 Prague, Czech Republic; (A.M.); (K.T.); (M.Š.); (P.M.); (V.K.); (P.P.); (A.P.); (F.P.); (F.L.); (J.Š.); (J.M.); (J.N.); (J.H.)
| | - Michal Pravenec
- Institute of Physiology, Czech Academy of Sciences, Vídeňská 1083, 142 20 Prague, Czech Republic; (A.M.); (K.T.); (M.Š.); (P.M.); (V.K.); (P.P.); (A.P.); (F.P.); (F.L.); (J.Š.); (J.M.); (J.N.); (J.H.)
- Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University and General University Hospital, 128 00 Prague, Czech Republic
| | - Tomáš Mráček
- Institute of Physiology, Czech Academy of Sciences, Vídeňská 1083, 142 20 Prague, Czech Republic; (A.M.); (K.T.); (M.Š.); (P.M.); (V.K.); (P.P.); (A.P.); (F.P.); (F.L.); (J.Š.); (J.M.); (J.N.); (J.H.)
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5
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Abstract
Mitochondria are complex organelles with two membranes. Their architecture is determined by characteristic folds of the inner membrane, termed cristae. Recent studies in yeast and other organisms led to the identification of four major pathways that cooperate to shape cristae membranes. These include dimer formation of the mitochondrial ATP synthase, assembly of the mitochondrial contact site and cristae organizing system (MICOS), inner membrane remodelling by a dynamin-related GTPase (Mgm1/OPA1), and modulation of the mitochondrial lipid composition. In this review, we describe the function of the evolutionarily conserved machineries involved in mitochondrial cristae biogenesis with a focus on yeast and present current models to explain how their coordinated activities establish mitochondrial membrane architecture.
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Affiliation(s)
- Till Klecker
- Institut für Zellbiologie, Universität Bayreuth, 95440 Bayreuth, Germany
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6
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Yang G, Ding Y, Shang X, Zhao T, Lu S, Tian J, Weng J, Zeng X. Atp23p and Atp10p coordinate to regulate the assembly of yeast mitochondrial ATP synthase. FASEB J 2021; 35:e21538. [PMID: 33956347 DOI: 10.1096/fj.202002475r] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 02/10/2021] [Accepted: 03/03/2021] [Indexed: 11/11/2022]
Abstract
Two chaperones, Atp23p and Atp10p, were previously shown to regulate the assembly of yeast mitochondrial ATP synthase, and extra expression of ATP23 was found to partially rescue an atp10 deletion mutant, by an unknown mechanism. Here, we identified that the residues 112-115 (LRDK) of Atp23p were required for its function in assisting assembly of the synthase, and demonstrated both functions of Atp23p, processing subunit 6 precursor and assisting assembly of the synthase, were required for the partial rescue of atp10 deletion mutant. By chasing labeling with isotope 35 S-methionine, we found the stability of subunit 6 of the synthase increased in atp10 null strain upon overexpression of ATP23. Further co-immunoprecipitation (Co-IP) and blue native PAGE experiments showed that Atp23p and Atp10p were physically associated with each other in wild type. Moreover, we revealed the expression level of Atp23p increased in atp10 null mutant compared with the wild type. Furthermore, we found that, after 72 hours growth, atp10 null mutant showed leaky growth on respiratory substrates, presence of low level of subunit 6 and partial recovery of oligomycin sensitivity of mitochondrial ATPase activity. Further characterization revealed the expression of Atp23p increased after 24 hours growth in the mutant. These results indicated, in atp10 null mutant, ATP10 deficiency could be partially complemented with increased expression of Atp23p by stabilizing some subunit 6 of the synthase. Taken together, this study revealed the two chaperones Atp23p and Atp10p coordinated to regulate the assembly of mitochondrial ATP synthase, which advanced our understanding of mechanism of assembly of yeast mitochondrial ATP synthase.
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Affiliation(s)
- Guangying Yang
- Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, Center for Human Genome Research, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, China
| | - Yuanyuan Ding
- Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, Center for Human Genome Research, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, China
| | - Xiaohui Shang
- Medical College of Hebei University of Engineering, Handan, China
| | - Tong Zhao
- Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, Center for Human Genome Research, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, China
| | - Shan Lu
- Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, Center for Human Genome Research, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, China
| | - Jinghan Tian
- Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, Center for Human Genome Research, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, China
| | - Jun Weng
- Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, Center for Human Genome Research, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, China
| | - Xiaomei Zeng
- Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, Center for Human Genome Research, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, China
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7
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Su X, Dautant A, Rak M, Godard F, Ezkurdia N, Bouhier M, Bietenhader M, Mueller DM, Kucharczyk R, di Rago JP, Tribouillard-Tanvier D. The pathogenic m.8993 T > G mutation in mitochondrial ATP6 gene prevents proton release from the subunit c-ring rotor of ATP synthase. Hum Mol Genet 2021; 30:381-392. [PMID: 33600551 DOI: 10.1093/hmg/ddab043] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 01/26/2021] [Accepted: 01/26/2021] [Indexed: 02/05/2023] Open
Abstract
The human ATP synthase is an assembly of 29 subunits of 18 different types, of which only two (a and 8) are encoded in the mitochondrial genome. Subunit a, together with an oligomeric ring of c-subunit (c-ring), forms the proton pathway responsible for the transport of protons through the mitochondrial inner membrane, coupled to rotation of the c-ring and ATP synthesis. Neuromuscular diseases have been associated to a number of mutations in the gene encoding subunit a, ATP6. The most common, m.8993 T > G, leads to replacement of a strictly conserved leucine residue with arginine (aL156R). We previously showed that the equivalent mutation (aL173R) dramatically compromises respiratory growth of Saccharomyces cerevisiae and causes a 90% drop in the rate of mitochondrial ATP synthesis. Here, we isolated revertants from the aL173R strain that show improved respiratory growth. Four first-site reversions at codon 173 (aL173M, aL173S, aL173K and aL173W) and five second-site reversions at another codon (aR169M, aR169S, aA170P, aA170G and aI216S) were identified. Based on the atomic structures of yeast ATP synthase and the biochemical properties of the revertant strains, we propose that the aL173R mutation is responsible for unfavorable electrostatic interactions that prevent the release of protons from the c-ring into a channel from which protons move from the c-ring to the mitochondrial matrix. The results provide further evidence that yeast aL173 (and thus human aL156) optimizes the exit of protons from ATP synthase, but is not essential despite its strict evolutionary conservation.
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Affiliation(s)
- Xin Su
- University Bordeaux, CNRS, IBGC, UMR 5095, F-33000 Bordeaux, France
| | - Alain Dautant
- University Bordeaux, CNRS, IBGC, UMR 5095, F-33000 Bordeaux, France
| | - Malgorzata Rak
- University Bordeaux, CNRS, IBGC, UMR 5095, F-33000 Bordeaux, France
| | - François Godard
- University Bordeaux, CNRS, IBGC, UMR 5095, F-33000 Bordeaux, France
| | - Nahia Ezkurdia
- University Bordeaux, CNRS, IBGC, UMR 5095, F-33000 Bordeaux, France
| | - Marine Bouhier
- University Bordeaux, CNRS, IBGC, UMR 5095, F-33000 Bordeaux, France
| | | | - David M Mueller
- Center for Genetic Diseases, Chicago Medical School, Rosalind Franklin University, 3333 Green Bay Rd, North Chicago, IL, 60064, USA
| | - Roza Kucharczyk
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, 00090 Warsaw, Poland
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Bahri H, Buratto J, Rojo M, Dompierre JP, Salin B, Blancard C, Cuvellier S, Rose M, Ben Ammar Elgaaied A, Tetaud E, di Rago JP, Devin A, Duvezin-Caubet S. TMEM70 forms oligomeric scaffolds within mitochondrial cristae promoting in situ assembly of mammalian ATP synthase proton channel. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2020; 1868:118942. [PMID: 33359711 DOI: 10.1016/j.bbamcr.2020.118942] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 11/28/2020] [Accepted: 12/18/2020] [Indexed: 01/14/2023]
Abstract
Mitochondrial ATP-synthesis is catalyzed by a F1Fo-ATP synthase, an enzyme of dual genetic origin enriched at the edge of cristae where it plays a key role in their structure/stability. The enzyme's biogenesis remains poorly understood, both from a mechanistic and a compartmentalization point of view. The present study provides novel molecular insights into this process through investigations on a human protein called TMEM70 with an unclear role in the assembly of ATP synthase. A recent study has revealed the existence of physical interactions between TMEM70 and the subunit c (Su.c), a protein present in 8 identical copies forming a transmembrane oligomeric ring (c-ring) within the ATP synthase proton translocating domain (Fo). Herein we analyzed the ATP-synthase assembly in cells lacking TMEM70, mitochondrial DNA or F1 subunits and observe a direct correlation between TMEM70 and Su.c levels, regardless of the status of other ATP synthase subunits or of mitochondrial bioenergetics. Immunoprecipitation, two-dimensional blue-native/SDS-PAGE, and pulse-chase experiments reveal that TMEM70 forms large oligomers that interact with Su.c not yet incorporated into ATP synthase complexes. Moreover, discrete TMEM70-Su.c complexes with increasing Su.c contents can be detected, suggesting a role for TMEM70 oligomers in the gradual assembly of the c-ring. Furthermore, we demonstrate using expansion super-resolution microscopy the specific localization of TMEM70 at the inner cristae membrane, distinct from the MICOS component MIC60. Taken together, our results show that TMEM70 oligomers provide a scaffold for c-ring assembly and that mammalian ATP synthase is assembled within inner cristae membranes.
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Affiliation(s)
- Hela Bahri
- Université Bordeaux, IBGC, UMR 5095, F-33000 Bordeaux, France; CNRS, IBGC, UMR 5095, F-33000 Bordeaux, France; Laboratoire de génétique, Immunologie et Pathologie Humaine, Faculté des sciences de Tunis, Université Tunis-El Manar FST, Tunis, Tunisie
| | - Jeremie Buratto
- Université Bordeaux, IBGC, UMR 5095, F-33000 Bordeaux, France; CNRS, IBGC, UMR 5095, F-33000 Bordeaux, France; Université Bordeaux, CNRS, IPB, CBMN (UMR 5248), Institut Européen de Chimie et Biologie, 2 rue Robert Escarpit, F-33600 Pessac, France
| | - Manuel Rojo
- Université Bordeaux, IBGC, UMR 5095, F-33000 Bordeaux, France; CNRS, IBGC, UMR 5095, F-33000 Bordeaux, France
| | - Jim Paul Dompierre
- Université Bordeaux, IBGC, UMR 5095, F-33000 Bordeaux, France; CNRS, IBGC, UMR 5095, F-33000 Bordeaux, France
| | - Bénédicte Salin
- Université Bordeaux, IBGC, UMR 5095, F-33000 Bordeaux, France; CNRS, IBGC, UMR 5095, F-33000 Bordeaux, France
| | - Corinne Blancard
- Université Bordeaux, IBGC, UMR 5095, F-33000 Bordeaux, France; CNRS, IBGC, UMR 5095, F-33000 Bordeaux, France
| | - Sylvain Cuvellier
- Université Bordeaux, IBGC, UMR 5095, F-33000 Bordeaux, France; CNRS, IBGC, UMR 5095, F-33000 Bordeaux, France
| | - Marie Rose
- Université Bordeaux, IBGC, UMR 5095, F-33000 Bordeaux, France; CNRS, IBGC, UMR 5095, F-33000 Bordeaux, France
| | - Amel Ben Ammar Elgaaied
- Laboratoire de génétique, Immunologie et Pathologie Humaine, Faculté des sciences de Tunis, Université Tunis-El Manar FST, Tunis, Tunisie
| | - Emmanuel Tetaud
- Université Bordeaux, IBGC, UMR 5095, F-33000 Bordeaux, France; CNRS, IBGC, UMR 5095, F-33000 Bordeaux, France; Laboratoire de Microbiologie Fondamentale et Pathogénicité UMR-CNRS 5234, 146 rue Léo Saignat, CEDEX F-33076 Bordeaux, France
| | - Jean-Paul di Rago
- Université Bordeaux, IBGC, UMR 5095, F-33000 Bordeaux, France; CNRS, IBGC, UMR 5095, F-33000 Bordeaux, France
| | - Anne Devin
- Université Bordeaux, IBGC, UMR 5095, F-33000 Bordeaux, France; CNRS, IBGC, UMR 5095, F-33000 Bordeaux, France
| | - Stéphane Duvezin-Caubet
- Université Bordeaux, IBGC, UMR 5095, F-33000 Bordeaux, France; CNRS, IBGC, UMR 5095, F-33000 Bordeaux, France.
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9
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Kovalčíková J, Vrbacký M, Pecina P, Tauchmannová K, Nůsková H, Kaplanová V, Brázdová A, Alán L, Eliáš J, Čunátová K, Kořínek V, Sedlacek R, Mráček T, Houštěk J. TMEM70 facilitates biogenesis of mammalian ATP synthase by promoting subunit c incorporation into the rotor structure of the enzyme. FASEB J 2019; 33:14103-14117. [DOI: 10.1096/fj.201900685rr] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Jana Kovalčíková
- Department of Bioenergetics, Institute of Physiology, The Czech Academy of Sciences, Prague, Czech Republic
| | - Marek Vrbacký
- Department of Bioenergetics, Institute of Physiology, The Czech Academy of Sciences, Prague, Czech Republic
| | - Petr Pecina
- Department of Bioenergetics, Institute of Physiology, The Czech Academy of Sciences, Prague, Czech Republic
| | - Kateřina Tauchmannová
- Department of Bioenergetics, Institute of Physiology, The Czech Academy of Sciences, Prague, Czech Republic
| | - Hana Nůsková
- Department of Bioenergetics, Institute of Physiology, The Czech Academy of Sciences, Prague, Czech Republic
| | - Vilma Kaplanová
- Department of Bioenergetics, Institute of Physiology, The Czech Academy of Sciences, Prague, Czech Republic
| | - Andrea Brázdová
- Department of Bioenergetics, Institute of Physiology, The Czech Academy of Sciences, Prague, Czech Republic
| | - Lukáš Alán
- Department of Bioenergetics, Institute of Physiology, The Czech Academy of Sciences, Prague, Czech Republic
| | - Jan Eliáš
- Department of Bioenergetics, Institute of Physiology, The Czech Academy of Sciences, Prague, Czech Republic
| | - Kristýna Čunátová
- Department of Bioenergetics, Institute of Physiology, The Czech Academy of Sciences, Prague, Czech Republic
| | - Vladimír Kořínek
- Laboratory of Cell and Developmental Biology, Institute of Molecular Genetics, The Czech Academy of Sciences, Prague, Czech Republic
| | - Radislav Sedlacek
- Institute of Molecular Genetics, The Czech Academy of Sciences, Prague, Czech Republic
- Laboratory of Transgenic Models of Diseases and Czech Centre for Phenogenomics, The Czech Academy of Sciences, Prague, Czech Republic
| | - Tomáš Mráček
- Department of Bioenergetics, Institute of Physiology, The Czech Academy of Sciences, Prague, Czech Republic
| | - Josef Houštěk
- Department of Bioenergetics, Institute of Physiology, The Czech Academy of Sciences, Prague, Czech Republic
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10
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Barros MH, McStay GP. Modular biogenesis of mitochondrial respiratory complexes. Mitochondrion 2019; 50:94-114. [PMID: 31669617 DOI: 10.1016/j.mito.2019.10.008] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 09/04/2019] [Accepted: 10/10/2019] [Indexed: 11/29/2022]
Abstract
Mitochondrial function relies on the activity of oxidative phosphorylation to synthesise ATP and generate an electrochemical gradient across the inner mitochondrial membrane. These coupled processes are mediated by five multi-subunit complexes that reside in this inner membrane. These complexes are the product of both nuclear and mitochondrial gene products. Defects in the function or assembly of these complexes can lead to mitochondrial diseases due to deficits in energy production and mitochondrial functions. Appropriate biogenesis and function are mediated by a complex number of assembly factors that promote maturation of specific complex subunits to form the active oxidative phosphorylation complex. The understanding of the biogenesis of each complex has been informed by studies in both simple eukaryotes such as Saccharomyces cerevisiae and human patients with mitochondrial diseases. These studies reveal each complex assembles through a pathway using specific subunits and assembly factors to form kinetically distinct but related assembly modules. The current understanding of these complexes has embraced the revolutions in genomics and proteomics to further our knowledge on the impact of mitochondrial biology in genetics, medicine, and evolution.
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Affiliation(s)
- Mario H Barros
- Departamento de Microbiologia - Instituto de Ciências Biomédicas, Universidade de São Paulo, Brazil.
| | - Gavin P McStay
- Department of Biological Sciences, Staffordshire University, Stoke-on-Trent, United Kingdom.
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11
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Bouchez C, Devin A. Mitochondrial Biogenesis and Mitochondrial Reactive Oxygen Species (ROS): A Complex Relationship Regulated by the cAMP/PKA Signaling Pathway. Cells 2019; 8:cells8040287. [PMID: 30934711 PMCID: PMC6523352 DOI: 10.3390/cells8040287] [Citation(s) in RCA: 137] [Impact Index Per Article: 27.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 03/15/2019] [Accepted: 03/20/2019] [Indexed: 12/23/2022] Open
Abstract
Mitochondrial biogenesis is a complex process. It requires the contribution of both the nuclear and the mitochondrial genomes and therefore cross talk between the nucleus and mitochondria. Cellular energy demand can vary by great length and it is now well known that one way to adjust adenosine triphosphate (ATP) synthesis to energy demand is through modulation of mitochondrial content in eukaryotes. The knowledge of actors and signals regulating mitochondrial biogenesis is thus of high importance. Here, we review the regulation of mitochondrial biogenesis both in yeast and in mammalian cells through mitochondrial reactive oxygen species.
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Affiliation(s)
- Cyrielle Bouchez
- Université Bordeaux, IBGC, UMR 5095, 33077 Bordeaux cedex, France.
- Institut de Biochimie et Génétique Cellulaires, CNRS UMR 5095, 1, rue Camille Saint Saëns, 33077 Bordeaux Cedex, France.
| | - Anne Devin
- Université Bordeaux, IBGC, UMR 5095, 33077 Bordeaux cedex, France.
- Institut de Biochimie et Génétique Cellulaires, CNRS UMR 5095, 1, rue Camille Saint Saëns, 33077 Bordeaux Cedex, France.
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12
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Abstract
Mitochondria contain their own genome that encodes for a small number of proteins, while the vast majority of mitochondrial proteins is produced on cytosolic ribosomes. The formation of respiratory chain complexes depends on the coordinated biogenesis of mitochondrially encoded and nuclear-encoded subunits. In this review, we describe pathways that adjust mitochondrial protein synthesis and import of nuclear-encoded subunits to the assembly of respiratory chain complexes. Furthermore, we outline how defects in protein import into mitochondria affect nuclear gene expression to maintain protein homeostasis under physiological and stress conditions.
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Affiliation(s)
- Chantal Priesnitz
- Institute of Biochemistry and Molecular Biology, Center for Biochemistry and Molecular Cell Research (ZBMZ), Faculty of Medicine, University of Freiburg, D-79104 Freiburg, Germany
- Faculty of Biology, University of Freiburg, D-79104 Freiburg, Germany
| | - Thomas Becker
- Institute of Biochemistry and Molecular Biology, Center for Biochemistry and Molecular Cell Research (ZBMZ), Faculty of Medicine, University of Freiburg, D-79104 Freiburg, Germany
- BIOSS Centre for Biological Signaling Studies, University of Freiburg, D-79104 Freiburg, Germany
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13
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A Nucleus-Encoded Chloroplast Protein YL1 Is Involved in Chloroplast Development and Efficient Biogenesis of Chloroplast ATP Synthase in Rice. Sci Rep 2016; 6:32295. [PMID: 27585744 PMCID: PMC5009372 DOI: 10.1038/srep32295] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Accepted: 08/04/2016] [Indexed: 11/16/2022] Open
Abstract
Chloroplast ATP synthase (cpATPase) is an importance thylakoid membrane-associated photosynthetic complex involved in the light-dependent reactions of photosynthesis. In this study, we isolated and characterized a rice (Oryza sativa) mutant yellow leaf 1 (yl1), which exhibits chlorotic leaves throughout developmental stages. The YL1 mutation showed reduced chlorophyll contents, abnormal chloroplast morphology, and decreased photochemical efficiency. Moreover, YL1 deficiency disrupts the expression of genes associated with chloroplast development and photosynthesis. Molecular and genetic analyses revealed that YL1 is a nucleus-encoded protein with a predicted transmembrane domain in its carboxyl-terminus that is conserved in the higher plant kingdom. YL1 localizes to chloroplasts and is preferentially expressed in green tissues containing chloroplasts. Immunoblot analyses showed that inactivation of YL1 leads to drastically reduced accumulation of AtpA (α) and AtpB (β), two core subunits of CF1αβ subcomplex of cpATPase, meanwhile, a severe decrease (ca. 41.7%) in cpATPase activity was observed in the yl1-1 mutant compared with the wild type. Furthermore, yeast two-hybrid and bimolecular fluorescence complementation assays revealed a specific interaction between YL1 and AtpB subunit of cpATPase. Taken together, our results suggest that YL1 is a plant lineage-specific auxiliary factor involved in the biogenesis of the cpATPase complex, possibly via interacting with the β-subunit.
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14
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Lasserre JP, Dautant A, Aiyar RS, Kucharczyk R, Glatigny A, Tribouillard-Tanvier D, Rytka J, Blondel M, Skoczen N, Reynier P, Pitayu L, Rötig A, Delahodde A, Steinmetz LM, Dujardin G, Procaccio V, di Rago JP. Yeast as a system for modeling mitochondrial disease mechanisms and discovering therapies. Dis Model Mech 2016; 8:509-26. [PMID: 26035862 PMCID: PMC4457039 DOI: 10.1242/dmm.020438] [Citation(s) in RCA: 101] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Mitochondrial diseases are severe and largely untreatable. Owing to the many essential processes carried out by mitochondria and the complex cellular systems that support these processes, these diseases are diverse, pleiotropic, and challenging to study. Much of our current understanding of mitochondrial function and dysfunction comes from studies in the baker's yeast Saccharomyces cerevisiae. Because of its good fermenting capacity, S. cerevisiae can survive mutations that inactivate oxidative phosphorylation, has the ability to tolerate the complete loss of mitochondrial DNA (a property referred to as ‘petite-positivity’), and is amenable to mitochondrial and nuclear genome manipulation. These attributes make it an excellent model system for studying and resolving the molecular basis of numerous mitochondrial diseases. Here, we review the invaluable insights this model organism has yielded about diseases caused by mitochondrial dysfunction, which ranges from primary defects in oxidative phosphorylation to metabolic disorders, as well as dysfunctions in maintaining the genome or in the dynamics of mitochondria. Owing to the high level of functional conservation between yeast and human mitochondrial genes, several yeast species have been instrumental in revealing the molecular mechanisms of pathogenic human mitochondrial gene mutations. Importantly, such insights have pointed to potential therapeutic targets, as have genetic and chemical screens using yeast. Summary: In this Review, we discuss the use of budding yeast to understand mitochondrial diseases and help in the search for their treatments.
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Affiliation(s)
- Jean-Paul Lasserre
- University Bordeaux-CNRS, IBGC, UMR 5095, 1 rue Camille Saint-Saëns, Bordeaux F-33000, France
| | - Alain Dautant
- University Bordeaux-CNRS, IBGC, UMR 5095, 1 rue Camille Saint-Saëns, Bordeaux F-33000, France
| | - Raeka S Aiyar
- European Molecular Biology Laboratory (EMBL), Genome Biology Unit, Meyerhofstrasse 1, Heidelberg 69117, Germany
| | - Roza Kucharczyk
- Department of Genetics, Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw 02-106, Poland
| | - Annie Glatigny
- Institute for Integrative Biology of the Cell (I2BC), Université Paris-Saclay, CEA, CNRS, Université Paris-Sud, 1 avenue de la terrasse, Gif-sur-Yvette 91198, France
| | - Déborah Tribouillard-Tanvier
- Institut National de la Santé et de la Recherche Médicale UMR1078, Université de Bretagne Occidentale, Faculté de Médecine et des Sciences de la Santé, Etablissement Français du Sang (EFS) Bretagne, CHRU Brest, Hôpital Morvan, Laboratoire de Génétique Moléculaire, Brest F-29200, France
| | - Joanna Rytka
- Department of Genetics, Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw 02-106, Poland
| | - Marc Blondel
- Institut National de la Santé et de la Recherche Médicale UMR1078, Université de Bretagne Occidentale, Faculté de Médecine et des Sciences de la Santé, Etablissement Français du Sang (EFS) Bretagne, CHRU Brest, Hôpital Morvan, Laboratoire de Génétique Moléculaire, Brest F-29200, France
| | - Natalia Skoczen
- University Bordeaux-CNRS, IBGC, UMR 5095, 1 rue Camille Saint-Saëns, Bordeaux F-33000, France Department of Genetics, Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw 02-106, Poland
| | - Pascal Reynier
- UMR CNRS 6214-INSERM U1083, Angers 49933, Cedex 9, France Département de Biochimie et Génétique, Centre Hospitalier Universitaire d'Angers, Angers 49933, Cedex 9, France
| | - Laras Pitayu
- Institute for Integrative Biology of the Cell (I2BC), Université Paris-Saclay, CEA, CNRS, Université Paris-Sud, rue Gregor Mendel, Orsay 91405, France
| | - Agnès Rötig
- Inserm U1163, Hôpital Necker-Enfants-Malades, Institut Imagine, Université Paris Descartes-Sorbonne Paris Cité, 149 rue de Sèvres, Paris 75015, France
| | - Agnès Delahodde
- Institute for Integrative Biology of the Cell (I2BC), Université Paris-Saclay, CEA, CNRS, Université Paris-Sud, rue Gregor Mendel, Orsay 91405, France
| | - Lars M Steinmetz
- European Molecular Biology Laboratory (EMBL), Genome Biology Unit, Meyerhofstrasse 1, Heidelberg 69117, Germany Stanford Genome Technology Center, Department of Biochemistry, Stanford University, Palo Alto, CA 94304, USA Department of Genetics, Stanford University School of Medicine, Stanford, CA 94305-5301, USA
| | - Geneviève Dujardin
- Institute for Integrative Biology of the Cell (I2BC), Université Paris-Saclay, CEA, CNRS, Université Paris-Sud, 1 avenue de la terrasse, Gif-sur-Yvette 91198, France
| | - Vincent Procaccio
- UMR CNRS 6214-INSERM U1083, Angers 49933, Cedex 9, France Département de Biochimie et Génétique, Centre Hospitalier Universitaire d'Angers, Angers 49933, Cedex 9, France
| | - Jean-Paul di Rago
- University Bordeaux-CNRS, IBGC, UMR 5095, 1 rue Camille Saint-Saëns, Bordeaux F-33000, France
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15
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Sardin E, Donadello S, di Rago JP, Tetaud E. Biochemical investigation of a human pathogenic mutation in the nuclear ATP5E gene using yeast as a model. Front Genet 2015; 6:159. [PMID: 25954304 PMCID: PMC4407571 DOI: 10.3389/fgene.2015.00159] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Accepted: 04/08/2015] [Indexed: 12/13/2022] Open
Abstract
F1F0-ATP synthase is a key enzyme of the mitochondrial energetic metabolism responsible for the production of most cellular ATP in humans. Mayr et al. (2010) recently described a patient with a homozygote (Y12C) mutation in the nuclear gene ATP5E encoding the ε-subunit of ATP synthase. To better define how it affects ATP synthase, we have modeled this mutation in the yeast Saccharomyces cerevisiae. A yeast equivalent of this mutation (Y11C) had no significant effect on the growth of yeast on non-fermentable carbon sources (glycerol/ethanol or lactate), conditions under which the activity of the mitochondrial energy transducing system is absolutely essential. In addition, similar to what was observed in patient, this mutation in yeast has a minimal effect on the ATPase/synthase activities. On the contrary, this mutation which has been shown to have a strong impact on the assembly of the ATP synthase complex in humans, shows no significant impact on the assembly/stability of this complex in yeast, suggesting that biogenesis of this complex differs significantly.
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Affiliation(s)
- Elodie Sardin
- CNRS, Génétique Moléculaire des Systèmes Mitochondriaux, Institut de Biochimie et Génétique Cellulaires, UMR 5095 Bordeaux, France ; Université de Bordeaux, Institut de Biochimie et Génétique Cellulaires, UMR 5095 Bordeaux, France
| | - Stéphanie Donadello
- CNRS, Génétique Moléculaire des Systèmes Mitochondriaux, Institut de Biochimie et Génétique Cellulaires, UMR 5095 Bordeaux, France ; Université de Bordeaux, Institut de Biochimie et Génétique Cellulaires, UMR 5095 Bordeaux, France
| | - Jean-Paul di Rago
- CNRS, Génétique Moléculaire des Systèmes Mitochondriaux, Institut de Biochimie et Génétique Cellulaires, UMR 5095 Bordeaux, France ; Université de Bordeaux, Institut de Biochimie et Génétique Cellulaires, UMR 5095 Bordeaux, France
| | - Emmanuel Tetaud
- CNRS, Génétique Moléculaire des Systèmes Mitochondriaux, Institut de Biochimie et Génétique Cellulaires, UMR 5095 Bordeaux, France ; Université de Bordeaux, Institut de Biochimie et Génétique Cellulaires, UMR 5095 Bordeaux, France
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16
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PAB is an assembly chaperone that functions downstream of chaperonin 60 in the assembly of chloroplast ATP synthase coupling factor 1. Proc Natl Acad Sci U S A 2015; 112:4152-7. [PMID: 25775508 DOI: 10.1073/pnas.1413392111] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The chloroplast ATP synthase, a multisubunit complex in the thylakoid membrane, catalyzes the light-driven synthesis of ATP, thereby supplying the energy for carbon fixation during photosynthesis. The chloroplast ATP synthase is composed of both nucleus- and chloroplast-encoded proteins that have required the evolution of novel mechanisms to coordinate the biosynthesis and assembly of chloroplast ATP synthase subunits temporally and spatially. Here we have elucidated the assembly mechanism of the α3β3γ core complex of the chloroplast ATP synthase by identification and functional characterization of a key assembly factor, PAB (protein in chloroplast atpase biogenesis). PAB directly interacts with the nucleus-encoded γ subunit and functions downstream of chaperonin 60 (Cpn60)-mediated CF1γ subunit folding to promote its assembly into the catalytic core. PAB does not have any recognizable motifs or domains but is conserved in photosynthetic eukaryotes. It is likely that PAB evolved together with the transfer of chloroplast genes into the nucleus to assist nucleus-encoded CF1γ assembly into the CF1 core. Such coordination might represent an evolutionarily conserved mechanism for folding and assembly of nucleus-encoded proteins to ensure proper assembly of multiprotein photosynthetic complexes.
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17
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Rühle T, Leister D. Assembly of F1F0-ATP synthases. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2015; 1847:849-60. [PMID: 25667968 DOI: 10.1016/j.bbabio.2015.02.005] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2014] [Revised: 01/28/2015] [Accepted: 02/02/2015] [Indexed: 12/31/2022]
Abstract
F1F0-ATP synthases are multimeric protein complexes and common prerequisites for their correct assembly are (i) provision of subunits in appropriate relative amounts, (ii) coordination of membrane insertion and (iii) avoidance of assembly intermediates that uncouple the proton gradient or wastefully hydrolyse ATP. Accessory factors facilitate these goals and assembly occurs in a modular fashion. Subcomplexes common to bacteria and mitochondria, but in part still elusive in chloroplasts, include a soluble F1 intermediate, a membrane-intrinsic, oligomeric c-ring, and a membrane-embedded subcomplex composed of stator subunits and subunit a. The final assembly step is thought to involve association of the preformed F1-c10-14 with the ab2 module (or the ab8-stator module in mitochondria)--mediated by binding of subunit δ in bacteria or OSCP in mitochondria, respectively. Despite the common evolutionary origin of F1F0-ATP synthases, the set of auxiliary factors required for their assembly in bacteria, mitochondria and chloroplasts shows clear signs of evolutionary divergence. This article is part of a Special Issue entitled: Chloroplast Biogenesis.
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Affiliation(s)
- Thilo Rühle
- Plant Molecular Biology (Botany), Department Biology I, Ludwig-Maximilians-Universität München (LMU), Großhaderner Straße 2, 82152 Planegg-Martinsried, Germany.
| | - Dario Leister
- Plant Molecular Biology (Botany), Department Biology I, Ludwig-Maximilians-Universität München (LMU), Großhaderner Straße 2, 82152 Planegg-Martinsried, Germany.
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18
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Frechin M, Enkler L, Tetaud E, Laporte D, Senger B, Blancard C, Hammann P, Bader G, Clauder-Münster S, Steinmetz L, Martin R, di Rago JP, Becker H. Expression of Nuclear and Mitochondrial Genes Encoding ATP Synthase Is Synchronized by Disassembly of a Multisynthetase Complex. Mol Cell 2014; 56:763-76. [DOI: 10.1016/j.molcel.2014.10.015] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Revised: 09/04/2014] [Accepted: 10/16/2014] [Indexed: 10/24/2022]
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19
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Lytovchenko O, Naumenko N, Oeljeklaus S, Schmidt B, von der Malsburg K, Deckers M, Warscheid B, van der Laan M, Rehling P. The INA complex facilitates assembly of the peripheral stalk of the mitochondrial F1Fo-ATP synthase. EMBO J 2014; 33:1624-38. [PMID: 24942160 DOI: 10.15252/embj.201488076] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Mitochondrial F1Fo-ATP synthase generates the bulk of cellular ATP. This molecular machine assembles from nuclear- and mitochondria-encoded subunits. Whereas chaperones for formation of the matrix-exposed hexameric F1-ATPase core domain have been identified, insight into how the nuclear-encoded F1-domain assembles with the membrane-embedded Fo-region is lacking. Here we identified the INA complex (INAC) in the inner membrane of mitochondria as an assembly factor involved in this process. Ina22 and Ina17 are INAC constituents that physically associate with the F1-module and peripheral stalk, but not with the assembled F1Fo-ATP synthase. Our analyses show that loss of Ina22 and Ina17 specifically impairs formation of the peripheral stalk that connects the catalytic F1-module to the membrane embedded Fo-domain. We conclude that INAC represents a matrix-exposed inner membrane protein complex that facilitates peripheral stalk assembly and thus promotes a key step in the biogenesis of mitochondrial F1Fo-ATP synthase.
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Affiliation(s)
- Oleksandr Lytovchenko
- Department of Cellular Biochemistry, University Medical Center Göttingen, Göttingen, Germany
| | - Nataliia Naumenko
- Department of Cellular Biochemistry, University Medical Center Göttingen, Göttingen, Germany
| | - Silke Oeljeklaus
- Department of Biochemistry and Functional Proteomics, Faculty for Biology, University of Freiburg, Freiburg, Germany BIOSS Centre for Biological Signalling Studies, University of Freiburg, Freiburg, Germany
| | - Bernhard Schmidt
- Department of Cellular Biochemistry, University Medical Center Göttingen, Göttingen, Germany
| | - Karina von der Malsburg
- Institute for Biochemistry and Molecular Biology, ZBMZ, University of Freiburg, Freiburg, Germany
| | - Markus Deckers
- Department of Cellular Biochemistry, University Medical Center Göttingen, Göttingen, Germany
| | - Bettina Warscheid
- Department of Biochemistry and Functional Proteomics, Faculty for Biology, University of Freiburg, Freiburg, Germany BIOSS Centre for Biological Signalling Studies, University of Freiburg, Freiburg, Germany
| | - Martin van der Laan
- BIOSS Centre for Biological Signalling Studies, University of Freiburg, Freiburg, Germany Institute for Biochemistry and Molecular Biology, ZBMZ, University of Freiburg, Freiburg, Germany
| | - Peter Rehling
- Department of Cellular Biochemistry, University Medical Center Göttingen, Göttingen, Germany Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
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20
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Rühle T, Razeghi JA, Vamvaka E, Viola S, Gandini C, Kleine T, Schünemann D, Barbato R, Jahns P, Leister D. The Arabidopsis protein CONSERVED ONLY IN THE GREEN LINEAGE160 promotes the assembly of the membranous part of the chloroplast ATP synthase. PLANT PHYSIOLOGY 2014; 165:207-26. [PMID: 24664203 PMCID: PMC4012581 DOI: 10.1104/pp.114.237883] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2014] [Accepted: 03/23/2014] [Indexed: 05/18/2023]
Abstract
The chloroplast F1Fo-ATP synthase/ATPase (cpATPase) couples ATP synthesis to the light-driven electrochemical proton gradient. The cpATPase is a multiprotein complex and consists of a membrane-spanning protein channel (comprising subunit types a, b, b', and c) and a peripheral domain (subunits α, β, γ, δ, and ε). We report the characterization of the Arabidopsis (Arabidopsis thaliana) CONSERVED ONLY IN THE GREEN LINEAGE160 (AtCGL160) protein (AtCGL160), conserved in green algae and plants. AtCGL160 is an integral thylakoid protein, and its carboxyl-terminal portion is distantly related to prokaryotic ATP SYNTHASE PROTEIN1 (Atp1/UncI) proteins that are thought to function in ATP synthase assembly. Plants without AtCGL160 display an increase in xanthophyll cycle activity and energy-dependent nonphotochemical quenching. These photosynthetic perturbations can be attributed to a severe reduction in cpATPase levels that result in increased acidification of the thylakoid lumen. AtCGL160 is not an integral cpATPase component but is specifically required for the efficient incorporation of the c-subunit into the cpATPase. AtCGL160, as well as a chimeric protein containing the amino-terminal part of AtCGL160 and Synechocystis sp. PCC6803 Atp1, physically interact with the c-subunit. We conclude that AtCGL160 and Atp1 facilitate the assembly of the membranous part of the cpATPase in their hosts, but loss of their functions provokes a unique compensatory response in each organism.
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21
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HEJZLAROVÁ K, MRÁČEK T, VRBACKÝ M, KAPLANOVÁ V, KARBANOVÁ V, NŮSKOVÁ H, PECINA P, HOUŠTĚK J. Nuclear Genetic Defects of Mitochondrial ATP Synthase. Physiol Res 2014; 63:S57-71. [DOI: 10.33549/physiolres.932643] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Disorders of ATP synthase, the key enzyme of mitochondrial energy provision belong to the most severe metabolic diseases presenting as early-onset mitochondrial encephalo-cardiomyopathies. Up to now, mutations in four nuclear genes were associated with isolated deficiency of ATP synthase. Two of them, ATP5A1 and ATP5E encode enzyme’s structural subunits α and ε, respectively, while the other two ATPAF2 and TMEM70 encode specific ancillary factors that facilitate the biogenesis of ATP synthase. All these defects share a similar biochemical phenotype with pronounced decrease in the content of fully assembled and functional ATP synthase complex. However, substantial differences can be found in their frequency, molecular mechanism of pathogenesis, clinical manifestation as well as the course of the disease progression. While for TMEM70 the number of reported patients as well as spectrum of the mutations is steadily increasing, mutations in ATP5A1, ATP5E and ATPAF2 genes are very rare. Apparently, TMEM70 gene is highly prone to mutagenesis and this type of a rare mitochondrial disease has a rather frequent incidence. Here we present overview of individual reported cases of nuclear mutations in ATP synthase and discuss, how their analysis can improve our understanding of the enzyme biogenesis.
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Affiliation(s)
| | | | | | | | | | | | | | - J. HOUŠTĚK
- Department of Bioenergetics, Institute of Physiology Academy of Sciences of the Czech Republic, Prague, Czech Republic
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22
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Kabala AM, Lasserre JP, Ackerman SH, di Rago JP, Kucharczyk R. Defining the impact on yeast ATP synthase of two pathogenic human mitochondrial DNA mutations, T9185C and T9191C. Biochimie 2013; 100:200-6. [PMID: 24316278 DOI: 10.1016/j.biochi.2013.11.024] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2013] [Accepted: 11/25/2013] [Indexed: 12/18/2022]
Abstract
Mutations in the human mitochondrial ATP6 gene encoding ATP synthase subunit a/6 (referred to as Atp6p in yeast) are at the base of neurodegenerative disorders like Neurogenic Ataxia and Retinitis Pigmentosa (NARP), Leigh syndrome (LS), Charcot-Marie-Tooth (CMT), and ataxia telangiectasia. In previous studies, using the yeast Saccharomyces cerevisiae as a model we were able to better define how several of these mutations impact the ATP synthase. Here we report the construction of yeast models of two other ATP6 pathogenic mutations, T9185C and T9191C. The first one was reported as conferring a mild, sometimes reversible, CMT clinical phenotype; the second one has been described in a patient presenting with severe LS. We found that an equivalent of the T9185C mutation partially impaired the functioning of yeast ATP synthase, with only a 30% deficit in mitochondrial ATP production. An equivalent of the mutation T9191C had much more severe effects, with a nearly complete block in yeast Atp6p assembly and an >95% drop in the rate of ATP synthesis. These findings provide a molecular basis for the relative severities of the diseases induced by T9185C and T9191C.
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Affiliation(s)
- Anna Magdalena Kabala
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland; Institut de Biochimie et Génétique Cellulaires, CNRS UMR5095, Université Bordeaux Segalen, 1 Rue Camille Saint-Saëns, Bordeaux 33077 cedex, France
| | - Jean-Paul Lasserre
- Institut de Biochimie et Génétique Cellulaires, CNRS UMR5095, Université Bordeaux Segalen, 1 Rue Camille Saint-Saëns, Bordeaux 33077 cedex, France
| | - Sharon H Ackerman
- Department of Biochemistry and Molecular Biology, Wayne State University School of Medicine, Detroit, MI, USA
| | - Jean-Paul di Rago
- Institut de Biochimie et Génétique Cellulaires, CNRS UMR5095, Université Bordeaux Segalen, 1 Rue Camille Saint-Saëns, Bordeaux 33077 cedex, France
| | - Roza Kucharczyk
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland.
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Salinas T, Larosa V, Cardol P, Maréchal-Drouard L, Remacle C. Respiratory-deficient mutants of the unicellular green alga Chlamydomonas: a review. Biochimie 2013; 100:207-18. [PMID: 24139906 DOI: 10.1016/j.biochi.2013.10.006] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2013] [Accepted: 10/08/2013] [Indexed: 12/28/2022]
Abstract
Genetic manipulation of the unicellular green alga Chlamydomonas reinhardtii is straightforward. Nuclear genes can be interrupted by insertional mutagenesis or targeted by RNA interference whereas random or site-directed mutagenesis allows the introduction of mutations in the mitochondrial genome. This, combined with a screen that easily allows discriminating respiratory-deficient mutants, makes Chlamydomonas a model system of choice to study mitochondria biology in photosynthetic organisms. Since the first description of Chlamydomonas respiratory-deficient mutants in 1977 by random mutagenesis, many other mutants affected in mitochondrial components have been characterized. These respiratory-deficient mutants increased our knowledge on function and assembly of the respiratory enzyme complexes. More recently some of these mutants allowed the study of mitochondrial gene expression processes poorly understood in Chlamydomonas. In this review, we update the data concerning the respiratory components with a special focus on the assembly factors identified on other organisms. In addition, we make an inventory of different mitochondrial respiratory mutants that are inactivated either on mitochondrial or nuclear genes.
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Affiliation(s)
- Thalia Salinas
- Institut de Biologie Moléculaire des Plantes, UPR CNRS 2357, Associated with Université de Strasbourg, 67084 Strasbourg Cedex, France
| | - Véronique Larosa
- Génétique des Microorganismes, Département de Sciences de la Vie, Institut de Botanique, B22, Université de Liège, B-4000 Liège, Belgium
| | - Pierre Cardol
- Génétique des Microorganismes, Département de Sciences de la Vie, Institut de Botanique, B22, Université de Liège, B-4000 Liège, Belgium
| | - Laurence Maréchal-Drouard
- Institut de Biologie Moléculaire des Plantes, UPR CNRS 2357, Associated with Université de Strasbourg, 67084 Strasbourg Cedex, France
| | - Claire Remacle
- Génétique des Microorganismes, Département de Sciences de la Vie, Institut de Botanique, B22, Université de Liège, B-4000 Liège, Belgium.
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Ostojić J, Panozzo C, Lasserre JP, Nouet C, Courtin F, Blancard C, di Rago JP, Dujardin G. The energetic state of mitochondria modulates complex III biogenesis through the ATP-dependent activity of Bcs1. Cell Metab 2013; 18:567-77. [PMID: 24055101 DOI: 10.1016/j.cmet.2013.08.017] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2013] [Revised: 03/27/2013] [Accepted: 08/12/2013] [Indexed: 01/08/2023]
Abstract
Our understanding of the mechanisms involved in mitochondrial biogenesis has continuously expanded during the last decades, yet little is known about how they are modulated to optimize the functioning of mitochondria. Here, we show that mutations in the ATP binding domain of Bcs1, a chaperone involved in the assembly of complex III, can be rescued by mutations that decrease the ATP hydrolytic activity of the ATP synthase. Our results reveal a Bcs1-mediated control loop in which the biogenesis of complex III is modulated by the energy-transducing activity of mitochondria. Although ATP is well known as a regulator of a number of cellular activities, we show here that ATP can be also used to modulate the biogenesis of an enzyme by controlling a specific chaperone involved in its assembly. Our study further highlights the intramitochondrial adenine nucleotide pool as a potential target for the treatment of Bcs1-based disorders.
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Affiliation(s)
- Jelena Ostojić
- Centre de Génétique Moléculaire, Université Paris-Sud, avenue de la Terrasse, 91198 Gif sur Yvette, France
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25
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Hilbers F, Eggers R, Pradela K, Friedrich K, Herkenhoff-Hesselmann B, Becker E, Deckers-Hebestreit G. Subunit δ is the key player for assembly of the H(+)-translocating unit of Escherichia coli F(O)F1 ATP synthase. J Biol Chem 2013; 288:25880-25894. [PMID: 23864656 DOI: 10.1074/jbc.m113.484675] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The ATP synthase (F(O)F1) of Escherichia coli couples the translocation of protons across the cytoplasmic membrane to the synthesis or hydrolysis of ATP. This nanomotor is composed of the rotor c10γε and the stator ab2α3β3δ. To study the assembly of this multimeric enzyme complex consisting of membrane-integral as well as peripheral hydrophilic subunits, we combined nearest neighbor analyses by intermolecular disulfide bond formation or purification of partially assembled F(O)F1 complexes by affinity chromatography with the use of mutants synthesizing different sets of F(O)F1 subunits. Together with a time-delayed in vivo assembly system, the results demonstrate that F(O)F1 is assembled in a modular way via subcomplexes, thereby preventing the formation of a functional H(+)-translocating unit as intermediate product. Surprisingly, during the biogenesis of F(O)F1, F1 subunit δ is the key player in generating stable F(O). Subunit δ serves as clamp between ab2 and c10α3β3γε and guarantees that the open H(+) channel is concomitantly assembled within coupled F(O)F1 to maintain the low membrane proton permeability essential for viability, a general prerequisite for the assembly of multimeric H(+)-translocating enzymes.
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Affiliation(s)
- Florian Hilbers
- From the Department of Microbiology, University of Osnabrück, Barbarastrasse 11, D-49069 Osnabrück, Germany
| | - Ruth Eggers
- From the Department of Microbiology, University of Osnabrück, Barbarastrasse 11, D-49069 Osnabrück, Germany
| | - Kamila Pradela
- From the Department of Microbiology, University of Osnabrück, Barbarastrasse 11, D-49069 Osnabrück, Germany
| | - Kathleen Friedrich
- From the Department of Microbiology, University of Osnabrück, Barbarastrasse 11, D-49069 Osnabrück, Germany
| | | | - Elisabeth Becker
- From the Department of Microbiology, University of Osnabrück, Barbarastrasse 11, D-49069 Osnabrück, Germany
| | - Gabriele Deckers-Hebestreit
- From the Department of Microbiology, University of Osnabrück, Barbarastrasse 11, D-49069 Osnabrück, Germany.
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26
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Abstract
The mitochondrion is arguably the most complex organelle in the budding yeast cell cytoplasm. It is essential for viability as well as respiratory growth. Its innermost aqueous compartment, the matrix, is bounded by the highly structured inner membrane, which in turn is bounded by the intermembrane space and the outer membrane. Approximately 1000 proteins are present in these organelles, of which eight major constituents are coded and synthesized in the matrix. The import of mitochondrial proteins synthesized in the cytoplasm, and their direction to the correct soluble compartments, correct membranes, and correct membrane surfaces/topologies, involves multiple pathways and macromolecular machines. The targeting of some, but not all, cytoplasmically synthesized mitochondrial proteins begins with translation of messenger RNAs localized to the organelle. Most proteins then pass through the translocase of the outer membrane to the intermembrane space, where divergent pathways sort them to the outer membrane, inner membrane, and matrix or trap them in the intermembrane space. Roughly 25% of mitochondrial proteins participate in maintenance or expression of the organellar genome at the inner surface of the inner membrane, providing 7 membrane proteins whose synthesis nucleates the assembly of three respiratory complexes.
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27
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Fontanesi F. Mechanisms of mitochondrial translational regulation. IUBMB Life 2013; 65:397-408. [PMID: 23554047 DOI: 10.1002/iub.1156] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2012] [Accepted: 01/31/2013] [Indexed: 11/11/2022]
Abstract
The mitochondrial oxidative phosphorylation system is formed by multimeric enzymes. In the yeast Saccharomyces cerevisiae, the bc1 complex, cytochrome c oxidase and the F1 FO ATP synthase contain subunits of dual genetic origin. It has been recently established that key subunits of these enzymes, translated on mitochondrial ribosomes, are the subjects of assembly-dependent translational regulation. This type of control of gene expression plays a pivotal role in optimizing the biogenesis of mitochondrial respiratory membranes by coordinating protein synthesis and complex assembly and by limiting the accumulation of potentially harmful assembly intermediates. Here, the author will discuss the mechanisms governing translational regulation in yeast mitochondria in the light of the most recent discoveries in the field.
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Affiliation(s)
- Flavia Fontanesi
- Department of Neurology, University of Miami, Miller School of Medicine, Miami, FL, USA.
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28
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Gulde PE, Christen L, Brown SV, Williams N. Three distinct isoforms of ATP synthase subunit c are expressed in T. brucei and assembled into the mitochondrial ATP synthase complex. PLoS One 2013; 8:e54039. [PMID: 23326569 PMCID: PMC3542316 DOI: 10.1371/journal.pone.0054039] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Accepted: 12/07/2012] [Indexed: 11/18/2022] Open
Abstract
One striking feature of the biology of trypanosomes is the changes in mitochondrial structure and function that occur as these parasites transition from one life cycle stage to another. Our laboratory has been interested in the role the mitochondrial ATP synthase plays in mitochondrial changes through the life cycle. Analysis of the recently completed T. brucei genome suggested that there may be multiple putative genes encoding ATP synthase subunit c. While homologous in their 3' ends, these genes differ in their 5' ends and, if expressed, would result in three distinct proteins. Our analysis showed that all three of the possible transcripts were detected in both procyclic and bloodstream stages, although the c-3 transcript was less abundant than that for c-1 or c-2. The three isoforms of subunit c are produced in both the bloodstream and procyclic stages and their mature protein products possess distinct N-terminal regions of the protein as found within mitochondria. All three isoforms are also incorporated into the assembled ATP synthase complex from procyclic cells. Although multiple subunit c genes have been found in other organisms, they produce identical polypeptides and the finding of significant differences in the mature proteins is unique to T. brucei.
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Affiliation(s)
- Paul E. Gulde
- Department of Microbiology and Immunology and Witebsky Center for Microbial Pathogenesis and Immunology, University at Buffalo, The State University of New York, Buffalo, New York, United States of America
| | - Linda Christen
- Department of Microbiology and Immunology and Witebsky Center for Microbial Pathogenesis and Immunology, University at Buffalo, The State University of New York, Buffalo, New York, United States of America
| | - Silvia V. Brown
- Department of Microbiology and Immunology and Witebsky Center for Microbial Pathogenesis and Immunology, University at Buffalo, The State University of New York, Buffalo, New York, United States of America
| | - Noreen Williams
- Department of Microbiology and Immunology and Witebsky Center for Microbial Pathogenesis and Immunology, University at Buffalo, The State University of New York, Buffalo, New York, United States of America
- * E-mail:
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29
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Baile MG, Claypool SM. The power of yeast to model diseases of the powerhouse of the cell. FRONT BIOSCI-LANDMRK 2013; 18:241-78. [PMID: 23276920 PMCID: PMC3874933 DOI: 10.2741/4098] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Mitochondria participate in a variety of cellular functions. As such, mitochondrial diseases exhibit numerous clinical phenotypes. Because mitochondrial functions are highly conserved between humans and Saccharomyces cerevisiae, yeast are an excellent model to study mitochondrial disease, providing insight into both physiological and pathophysiological processes.
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Affiliation(s)
- Matthew G Baile
- Dept. of Physiology, Johns Hopkins School of Medicine, 725 N. Wolfe St., Baltimore, MD 21205-2185, USA
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30
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Zhang B, Carrie C, Ivanova A, Narsai R, Murcha MW, Duncan O, Wang Y, Law SR, Albrecht V, Pogson B, Giraud E, Van Aken O, Whelan J. LETM proteins play a role in the accumulation of mitochondrially encoded proteins in Arabidopsis thaliana and AtLETM2 displays parent of origin effects. J Biol Chem 2012; 287:41757-73. [PMID: 23043101 PMCID: PMC3516725 DOI: 10.1074/jbc.m112.383836] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Revised: 10/01/2012] [Indexed: 11/06/2022] Open
Abstract
The Arabidopsis thaliana genome contains two genes with homology to the mitochondrial protein LETM1 (leucine zipper-EF-hand-containing transmembrane protein). Inactivation of both genes, Atletm1 and Atletm2, together is lethal. Plants that are hemizygous for AtLETM2 and homozygous for Atletm1 (letm1(-/-) LETM2(+/-)) displayed a mild retarded growth phenotype during early seedling growth. It was shown that accumulation of mitochondrial proteins was reduced in hemizygous (letm1(-/-) LETM2(+/-)) plants. Examination of respiratory chain proteins by Western blotting, blue native PAGE, and enzymatic activity assays revealed that the steady state level of ATP synthase was reduced in abundance, whereas the steady state levels of other respiratory chain proteins remained unchanged. The absence of a functional maternal AtLETM2 allele in an Atletm1 mutant background resulted in early seed abortion. Reciprocal crosses revealed that maternally, but not paternally, derived AtLETM2 was absolutely required for seed development. This requirement for a functional maternal allele of AtLETM2 was confirmed using direct sequencing of reciprocal crosses of Col-0 and Ler accessions. Furthermore, AtLETM2 promoter β-glucuronidase constructs displayed exclusive maternal expression patterns.
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Affiliation(s)
- Botao Zhang
- From the Australian Research Council Centre of Excellence in Plant Energy Biology and
| | - Chris Carrie
- From the Australian Research Council Centre of Excellence in Plant Energy Biology and
| | - Aneta Ivanova
- From the Australian Research Council Centre of Excellence in Plant Energy Biology and
| | - Reena Narsai
- From the Australian Research Council Centre of Excellence in Plant Energy Biology and
- Centre for Computational Systems Biology, Bayliss Building M316 University of Western Australia, 35 Stirling Highway, Crawley 6009, Western Australia, Australia and
| | - Monika W. Murcha
- From the Australian Research Council Centre of Excellence in Plant Energy Biology and
| | - Owen Duncan
- From the Australian Research Council Centre of Excellence in Plant Energy Biology and
| | - Yan Wang
- From the Australian Research Council Centre of Excellence in Plant Energy Biology and
| | - Simon R. Law
- From the Australian Research Council Centre of Excellence in Plant Energy Biology and
| | - Verónica Albrecht
- the Australian Research Council Centre of Excellence in Plant Energy Biology, Research School of Biology, Australian National University, Acton 2601, Australian Capital Territory, Australia
| | - Barry Pogson
- the Australian Research Council Centre of Excellence in Plant Energy Biology, Research School of Biology, Australian National University, Acton 2601, Australian Capital Territory, Australia
| | - Estelle Giraud
- From the Australian Research Council Centre of Excellence in Plant Energy Biology and
| | - Olivier Van Aken
- From the Australian Research Council Centre of Excellence in Plant Energy Biology and
| | - James Whelan
- From the Australian Research Council Centre of Excellence in Plant Energy Biology and
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31
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Yeast Transport. Yeast 2012. [DOI: 10.1002/9783527659180.ch8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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32
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Bietenhader M, Martos A, Tetaud E, Aiyar RS, Sellem CH, Kucharczyk R, Clauder-Münster S, Giraud MF, Godard F, Salin B, Sagot I, Gagneur J, Déquard-Chablat M, Contamine V, Denmat SHL, Sainsard-Chanet A, Steinmetz LM, di Rago JP. Experimental relocation of the mitochondrial ATP9 gene to the nucleus reveals forces underlying mitochondrial genome evolution. PLoS Genet 2012; 8:e1002876. [PMID: 22916027 PMCID: PMC3420929 DOI: 10.1371/journal.pgen.1002876] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2012] [Accepted: 06/19/2012] [Indexed: 01/21/2023] Open
Abstract
Only a few genes remain in the mitochondrial genome retained by every eukaryotic organism that carry out essential functions and are implicated in severe diseases. Experimentally relocating these few genes to the nucleus therefore has both therapeutic and evolutionary implications. Numerous unproductive attempts have been made to do so, with a total of only 5 successes across all organisms. We have taken a novel approach to relocating mitochondrial genes that utilizes naturally nuclear versions from other organisms. We demonstrate this approach on subunit 9/c of ATP synthase, successfully relocating this gene for the first time in any organism by expressing the ATP9 genes from Podospora anserina in Saccharomyces cerevisiae. This study substantiates the role of protein structure in mitochondrial gene transfer: expression of chimeric constructs reveals that the P. anserina proteins can be correctly imported into mitochondria due to reduced hydrophobicity of the first transmembrane segment. Nuclear expression of ATP9, while permitting almost fully functional oxidative phosphorylation, perturbs many cellular properties, including cellular morphology, and activates the heat shock response. Altogether, our study establishes a novel strategy for allotopic expression of mitochondrial genes, demonstrates the complex adaptations required to relocate ATP9, and indicates a reason that this gene was only transferred to the nucleus during the evolution of multicellular organisms.
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Affiliation(s)
- Maïlis Bietenhader
- Université Bordeaux, IBGC, UMR5095 CNRS, Bordeaux, France
- CNRS, IBGC, UMR5095 CNRS, Bordeaux, France
| | - Alexandre Martos
- Université Bordeaux, IBGC, UMR5095 CNRS, Bordeaux, France
- CNRS, IBGC, UMR5095 CNRS, Bordeaux, France
| | - Emmanuel Tetaud
- Université Bordeaux, IBGC, UMR5095 CNRS, Bordeaux, France
- CNRS, IBGC, UMR5095 CNRS, Bordeaux, France
| | - Raeka S. Aiyar
- Genome Biology Unit, European Molecular Biology Laboratory (EMBL), Heidelberg, Germany
| | - Carole H. Sellem
- Université Paris-Sud, Centre de Génétique Moléculaire, UPR3404, CNRS, Gif-sur-Yvette, France
| | - Roza Kucharczyk
- Université Bordeaux, IBGC, UMR5095 CNRS, Bordeaux, France
- CNRS, IBGC, UMR5095 CNRS, Bordeaux, France
| | | | - Marie-France Giraud
- Université Bordeaux, IBGC, UMR5095 CNRS, Bordeaux, France
- CNRS, IBGC, UMR5095 CNRS, Bordeaux, France
| | - François Godard
- Université Bordeaux, IBGC, UMR5095 CNRS, Bordeaux, France
- CNRS, IBGC, UMR5095 CNRS, Bordeaux, France
| | - Bénédicte Salin
- Université Bordeaux, IBGC, UMR5095 CNRS, Bordeaux, France
- CNRS, IBGC, UMR5095 CNRS, Bordeaux, France
| | - Isabelle Sagot
- Université Bordeaux, IBGC, UMR5095 CNRS, Bordeaux, France
- CNRS, IBGC, UMR5095 CNRS, Bordeaux, France
| | - Julien Gagneur
- Genome Biology Unit, European Molecular Biology Laboratory (EMBL), Heidelberg, Germany
| | - Michelle Déquard-Chablat
- Université Paris-Sud, Institut de Génétique et Microbiologie, UMR 8621, Orsay, France
- CNRS, Orsay, France
| | - Véronique Contamine
- Université Paris-Sud, Institut de Génétique et Microbiologie, UMR 8621, Orsay, France
- CNRS, Orsay, France
| | - Sylvie Hermann-Le Denmat
- Université Paris-Sud, Institut de Génétique et Microbiologie, UMR 8621, Orsay, France
- CNRS, Orsay, France
- Ecole Normale Supérieure, Paris, France
| | - Annie Sainsard-Chanet
- Université Paris-Sud, Centre de Génétique Moléculaire, UPR3404, CNRS, Gif-sur-Yvette, France
| | - Lars M. Steinmetz
- Genome Biology Unit, European Molecular Biology Laboratory (EMBL), Heidelberg, Germany
- * E-mail: (J-PdR); (LMS)
| | - Jean-Paul di Rago
- Université Bordeaux, IBGC, UMR5095 CNRS, Bordeaux, France
- CNRS, IBGC, UMR5095 CNRS, Bordeaux, France
- * E-mail: (J-PdR); (LMS)
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A deubiquitylating complex required for neosynthesis of a yeast mitochondrial ATP synthase subunit. PLoS One 2012; 7:e38071. [PMID: 22723847 PMCID: PMC3378586 DOI: 10.1371/journal.pone.0038071] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2011] [Accepted: 04/29/2012] [Indexed: 02/06/2023] Open
Abstract
The ubiquitin system is known to be involved in maintaining the integrity of mitochondria, but little is known about the role of deubiquitylating (DUB) enzymes in such functions. Budding yeast cells deleted for UBP13 and its close homolog UBP9 displayed a high incidence of petite colonies and slow respiratory growth at 37°C. Both Ubp9 and Ubp13 interacted directly with Duf1 (DUB-associated factor 1), a WD40 motif-containing protein. Duf1 activates the DUB activity of recombinant Ubp9 and Ubp13 in vitro and deletion of DUF1 resulted in the same respiratory phenotype as the deletion of both UBP9 and UBP13. We show that the mitochondrial defects of these mutants resulted from a strong decrease at 37°C in the de novo biosynthesis of Atp9, a membrane-bound component of ATP synthase encoded by mitochondrial DNA. The defect appears at the level of ATP9 mRNA translation, while its maturation remained unchanged in the mutants. This study describes a new role of the ubiquitin system in mitochondrial biogenesis.
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34
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Giardina BJ, Stanley BA, Chiang HL. Comparative proteomic analysis of transition of saccharomyces cerevisiae from glucose-deficient medium to glucose-rich medium. Proteome Sci 2012; 10:40. [PMID: 22691627 PMCID: PMC3607935 DOI: 10.1186/1477-5956-10-40] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2011] [Accepted: 05/29/2012] [Indexed: 12/26/2022] Open
Abstract
Background When glucose is added to Saccharomyces cerevisiae grown in non-fermentable carbon sources, genes encoding ribosomal, cell-cycle, and glycolytic proteins are induced. By contrast, genes involved in mitochondrial functions, gluconeogenesis, and the utilization of other carbon sources are repressed. Glucose also causes the activation of the plasma membrane ATPase and the inactivation of gluconeogenic enzymes and mitochondrial enzymes. The goals of this study were to use the iTRAQ-labeling mass spectrometry technique to identify proteins whose relative levels change in response to glucose re-feeding and to correlate changes in protein abundance with changes in transcription and enzymatic activities. We used an experimental condition that causes the degradation of gluconeogenic enzymes when glucose starved cells are replenished with glucose. Identification of these enzymes as being down-regulated by glucose served as an internal control. Furthermore, we sought to identify new proteins that were either up-regulated or down-regulated by glucose. Results We have identified new and known proteins that change their relative levels in cells that were transferred from medium containing low glucose to medium containing high glucose. Up-regulated proteins included ribosomal subunits, proteins involved in protein translation, and the plasma membrane ATPase. Down-regulated proteins included small heat shock proteins, mitochondrial proteins, glycolytic enzymes, and gluconeogenic enzymes. Ach1p is involved in acetate metabolism and is also down-regulated by glucose. Conclusions We have identified known proteins that have previously been reported to be regulated by glucose as well as new glucose-regulated proteins. Up-regulation of ribosomal proteins and proteins involved in translation may lead to an increase in protein synthesis and in nutrient uptake. Down-regulation of glycolytic enzymes, gluconeogenic enzymes, and mitochondrial proteins may result in changes in glycolysis, gluconeogenesis, and mitochondrial functions. These changes may be beneficial for glucose-starved cells to adapt to the addition of glucose.
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Affiliation(s)
- Bennett J Giardina
- Department of Cellular and Molecular Physiology, Penn State University College of Medicine, 500 University Drive, Hershey, PA, 17033, USA.
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35
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Jonckheere AI, Smeitink JAM, Rodenburg RJT. Mitochondrial ATP synthase: architecture, function and pathology. J Inherit Metab Dis 2012; 35:211-25. [PMID: 21874297 PMCID: PMC3278611 DOI: 10.1007/s10545-011-9382-9] [Citation(s) in RCA: 383] [Impact Index Per Article: 31.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2011] [Revised: 07/22/2011] [Accepted: 07/27/2011] [Indexed: 12/16/2022]
Abstract
Human mitochondrial (mt) ATP synthase, or complex V consists of two functional domains: F(1), situated in the mitochondrial matrix, and F(o), located in the inner mitochondrial membrane. Complex V uses the energy created by the proton electrochemical gradient to phosphorylate ADP to ATP. This review covers the architecture, function and assembly of complex V. The role of complex V di-and oligomerization and its relation with mitochondrial morphology is discussed. Finally, pathology related to complex V deficiency and current therapeutic strategies are highlighted. Despite the huge progress in this research field over the past decades, questions remain to be answered regarding the structure of subunits, the function of the rotary nanomotor at a molecular level, and the human complex V assembly process. The elucidation of more nuclear genetic defects will guide physio(patho)logical studies, paving the way for future therapeutic interventions.
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Affiliation(s)
- An I. Jonckheere
- Department of Pediatrics, Nijmegen Center for Mitochondrial Disorders, 656 Laboratory for Genetic, Endocrine, and Metabolic Disorders, Radboud University Nijmegen Medical Center, PO Box 9101, 6500 HB Nijmegen, The Netherlands
| | - Jan A. M. Smeitink
- Department of Pediatrics, Nijmegen Center for Mitochondrial Disorders, 656 Laboratory for Genetic, Endocrine, and Metabolic Disorders, Radboud University Nijmegen Medical Center, PO Box 9101, 6500 HB Nijmegen, The Netherlands
| | - Richard J. T. Rodenburg
- Department of Pediatrics, Nijmegen Center for Mitochondrial Disorders, 656 Laboratory for Genetic, Endocrine, and Metabolic Disorders, Radboud University Nijmegen Medical Center, PO Box 9101, 6500 HB Nijmegen, The Netherlands
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36
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Papa S, Martino PL, Capitanio G, Gaballo A, De Rasmo D, Signorile A, Petruzzella V. The oxidative phosphorylation system in mammalian mitochondria. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2012; 942:3-37. [PMID: 22399416 DOI: 10.1007/978-94-007-2869-1_1] [Citation(s) in RCA: 169] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The chapter provides a review of the state of art of the oxidative phosphorylation system in mammalian mitochondria. The sections of the paper deal with: (i) the respiratory chain as a whole: redox centers of the chain and protonic coupling in oxidative phosphorylation (ii) atomic structure and functional mechanism of protonmotive complexes I, III, IV and V of the oxidative phosphorylation system (iii) biogenesis of oxidative phosphorylation complexes: mitochondrial import of nuclear encoded subunits, assembly of oxidative phosphorylation complexes, transcriptional factors controlling biogenesis of the complexes. This advanced knowledge of the structure, functional mechanism and biogenesis of the oxidative phosphorylation system provides a background to understand the pathological impact of genetic and acquired dysfunctions of mitochondrial oxidative phosphorylation.
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Affiliation(s)
- Sergio Papa
- Department of Basic Medical Sciences, University of Bari, Bari, Italy.
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37
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Godard F, Tetaud E, Duvezin-Caubet S, di Rago JP. A genetic screen targeted on the FO component of mitochondrial ATP synthase in Saccharomyces cerevisiae. J Biol Chem 2011; 286:18181-9. [PMID: 21454598 DOI: 10.1074/jbc.m110.214825] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
In yeast, the two main F(O) proton-translocating subunits of the ATP synthase (subunits 6/a and 9/c) are encoded by mitochondrial DNA (mtDNA). Unfortunately, mutations that inactivate the F(O) typically result in loss of mtDNA under the form of ρ(-)/ρ(0) cells. Thus, we have designed a novel genetic strategy to circumvent this problem. It exploits previous findings that a null mutation in the nuclear ATP16 gene encoding ATP synthase subunit δ results in massive and lethal F(O)-mediated protons leaks across the inner mitochondrial membrane. Mutations that inactivate the F(O) can thus, in these conditions, be selected positively as cell viability rescuing events. A first set of seven mutants was analyzed and all showed, as expected, very severe F(O) deficiencies. Two mutants carried nuclear mutations in known genes (AEP1, AEP2) required for subunit c expression. The five other mutations were located in mtDNA. Of these, three affect synthesis or stability of subunit a transcripts and the two last consisted in a single amino acid replacement in subunit c. One of the subunit c mutations is particularly interesting. It consists in an alanine to valine change at position 60 of subunit c adjacent to the essential glutamate of subunit c (at position 59) that interacts with the essential arginine 186 of subunit a. The properties of this mutant suggest that the contact zone between subunit a and the ten subunits c-ring structure only involves critical transient interactions confined to the region where protons are exchanged between the subunit a and the c-ring.
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Affiliation(s)
- François Godard
- Institut de Biochimie et Génétique Cellulaires, UMR 5095 CNRS, Université Victor Segalen Bordeaux 2, 33077 Bordeaux, France
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Francis BR, Thorsness PE. Hsp90 and mitochondrial proteases Yme1 and Yta10/12 participate in ATP synthase assembly in Saccharomyces cerevisiae. Mitochondrion 2011; 11:587-600. [PMID: 21439406 DOI: 10.1016/j.mito.2011.03.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2010] [Revised: 02/22/2011] [Accepted: 03/15/2011] [Indexed: 10/18/2022]
Abstract
Hsc82 and Hsp82, the Hsp90 family proteins of yeast, are both required for fermentative growth at 37°C. Inactivation of either of the mitochondrial AAA proteases, Yme1 or Yta10/12, allows fermentative growth of hsc82∆ or hsp82∆ strains at 37°C. Genetic evidence indicates interaction of Hsc82/Hsp82 with the Yme1 and Yta10/Yta12 complexes in promoting F(1)F(o)-ATPase activity, with Hsc82 specifically required for F(1)-ATPase assembly. A previously reported mutation in Rpt3, one of the six ATPases of the proteasome, suppresses yme1∆ phenotypes and increases transcription of HSC82 but not HSP82. These genetic interactions describe a functional role for Hsp90 proteins in mitochondrial biogenesis.
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Affiliation(s)
- Brian R Francis
- Department of Molecular Biology, University of Wyoming, Laramie, WY 82071, USA
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Ohsakaya S, Fujikawa M, Hisabori T, Yoshida M. Knockdown of DAPIT (diabetes-associated protein in insulin-sensitive tissue) results in loss of ATP synthase in mitochondria. J Biol Chem 2011; 286:20292-6. [PMID: 21345788 DOI: 10.1074/jbc.m110.198523] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
It was found recently that a diabetes-associated protein in insulin-sensitive tissue (DAPIT) is associated with mitochondrial ATP synthase. Here, we report that the suppressed expression of DAPIT in DAPIT-knockdown HeLa cells causes loss of the population of ATP synthase in mitochondria. Consequently, DAPIT-knockdown cells show smaller mitochondrial ATP synthesis activity, slower growth in normal medium, and poorer viability in glucose-free medium than the control cells. The mRNA levels of α- and β-subunits of ATP synthase remain unchanged by DAPIT knockdown. These results indicate a critical role of DAPIT in maintaining the ATP synthase population in mitochondria and raise an intriguing possibility of active role of DAPIT in cellular energy metabolism.
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Affiliation(s)
- Shigenori Ohsakaya
- International Cooperative Research Project ATP-Synthesis Regulation Project, Japan Science and Technology Agency, 2-3-6 Aomi, Koto-Ku, Tokyo 135-0064, Japan
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Dequard-Chablat M, Sellem CH, Golik P, Bidard F, Martos A, Bietenhader M, di Rago JP, Sainsard-Chanet A, Hermann-Le Denmat S, Contamine V. Two Nuclear Life Cycle-Regulated Genes Encode Interchangeable Subunits c of Mitochondrial ATP Synthase in Podospora anserina. Mol Biol Evol 2011; 28:2063-75. [DOI: 10.1093/molbev/msr025] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
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F1F0-ATP synthases of alkaliphilic bacteria: lessons from their adaptations. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2010; 1797:1362-77. [PMID: 20193659 DOI: 10.1016/j.bbabio.2010.02.028] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2010] [Revised: 02/22/2010] [Accepted: 02/23/2010] [Indexed: 12/14/2022]
Abstract
This review focuses on the ATP synthases of alkaliphilic bacteria and, in particular, those that successfully overcome the bioenergetic challenges of achieving robust H+-coupled ATP synthesis at external pH values>10. At such pH values the protonmotive force, which is posited to provide the energetic driving force for ATP synthesis, is too low to account for the ATP synthesis observed. The protonmotive force is lowered at a very high pH by the need to maintain a cytoplasmic pH well below the pH outside, which results in an energetically adverse pH gradient. Several anticipated solutions to this bioenergetic conundrum have been ruled out. Although the transmembrane sodium motive force is high under alkaline conditions, respiratory alkaliphilic bacteria do not use Na+- instead of H+-coupled ATP synthases. Nor do they offset the adverse pH gradient with a compensatory increase in the transmembrane electrical potential component of the protonmotive force. Moreover, studies of ATP synthase rotors indicate that alkaliphiles cannot fully resolve the energetic problem by using an ATP synthase with a large number of c-subunits in the synthase rotor ring. Increased attention now focuses on delocalized gradients near the membrane surface and H+ transfers to ATP synthases via membrane-associated microcircuits between the H+ pumping complexes and synthases. Microcircuits likely depend upon proximity of pumps and synthases, specific membrane properties and specific adaptations of the participating enzyme complexes. ATP synthesis in alkaliphiles depends upon alkaliphile-specific adaptations of the ATP synthase and there is also evidence for alkaliphile-specific adaptations of respiratory chain components.
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Wittig I, Meyer B, Heide H, Steger M, Bleier L, Wumaier Z, Karas M, Schägger H. Assembly and oligomerization of human ATP synthase lacking mitochondrial subunits a and A6L. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2010; 1797:1004-11. [PMID: 20188060 DOI: 10.1016/j.bbabio.2010.02.021] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2009] [Revised: 02/18/2010] [Accepted: 02/19/2010] [Indexed: 12/22/2022]
Abstract
Here we study ATP synthase from human rho0 (rho zero) cells by clear native electrophoresis (CNE or CN-PAGE) and show that ATP synthase is almost fully assembled in spite of the absence of subunits a and A6L. This identifies subunits a and A6L as two of the last subunits to complete the ATP synthase assembly. Minor amounts of dimeric and even tetrameric forms of the large assembly intermediate were preserved under the conditions of CNE, suggesting that it associated further into higher order structures in the mitochondrial membrane. This result was reminiscent to the reduced amounts of dimeric and tetrameric ATP synthase from yeast null mutants of subunits e and g detected by CNE. The dimer/oligomer-stabilizing effects of subunits e/g and a/A6L seem additive in human and yeast cells. The mature IF1 inhibitor was specifically bound to the dimeric/oligomeric forms of ATP synthase and not to the monomer. Conversely, nonprocessed pre-IF1 still containing the mitochondrial targeting sequence was selectively bound to the monomeric assembly intermediate in rho0 cells and not to the dimeric form. This supports previous suggestions that IF1 plays an important role in the dimerization/oligomerization of mammalian ATP synthase and in the regulation of mitochondrial structure and function.
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Affiliation(s)
- Ilka Wittig
- Molecular Bioenergetics Group, Medical School, Goethe-University Frankfurt, Theodor-Stern-Kai 7, D-60590 Frankfurt am Main, Germany.
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Lapaille M, Escobar-Ramírez A, Degand H, Baurain D, Rodríguez-Salinas E, Coosemans N, Boutry M, Gonzalez-Halphen D, Remacle C, Cardol P. Atypical subunit composition of the chlorophycean mitochondrial F1FO-ATP synthase and role of Asa7 protein in stability and oligomycin resistance of the enzyme. Mol Biol Evol 2010; 27:1630-44. [PMID: 20156838 DOI: 10.1093/molbev/msq049] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
In yeast, mammals, and land plants, mitochondrial F(1)F(O)-ATP synthase (complex V) is a remarkable enzymatic machinery that comprises about 15 conserved subunits. Peculiar among eukaryotes, complex V from Chlamydomonadales algae (order of chlorophycean class) has an atypical subunit composition of its peripheral stator and dimerization module, with nine subunits of unknown evolutionary origin (Asa subunits). In vitro, this enzyme exhibits an increased stability of its dimeric form, and in vivo, Chlamydomonas reinhardtii cells are insensitive to oligomycins, which are potent inhibitors of proton translocation through the F(O) moiety. In this work, we showed that the atypical features of the Chlamydomonadales complex V enzyme are shared by the other chlorophycean orders. By biochemical and in silico analyses, we detected several atypical Asa subunits in Scenedesmus obliquus (Sphaeropleales) and Chlorococcum ellipsoideum (Chlorococcales). In contrast, complex V has a canonical subunit composition in other classes of Chlorophytes (Trebouxiophyceae, Prasinophyceae, and Ulvophyceae) as well as in Streptophytes (land plants), and in Rhodophytes (red algae). Growth, respiration, and ATP levels in Chlorophyceae were also barely affected by oligomycin concentrations that affect representatives of the other classes of Chlorophytes. We finally studied the function of the Asa7 atypical subunit by using RNA interference in C. reinhardtii. Although the loss of Asa7 subunit has no impact on cell bioenergetics or mitochondrial structures, it destabilizes in vitro the enzyme dimeric form and renders growth, respiration, and ATP level sensitive to oligomycins. Altogether, our results suggest that the loss of canonical components of the complex V stator happened at the root of chlorophycean lineage and was accompanied by the recruitment of novel polypeptides. Such a massive modification of complex V stator features might have conferred novel properties, including the stabilization of the enzyme dimeric form and the shielding of the proton channel. In these respects, we discuss an evolutionary scenario for F(1)F(O)-ATP synthase in the whole green lineage (i.e., Chlorophyta and Streptophyta).
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Affiliation(s)
- Marie Lapaille
- Genetics of Microorganisms, Department of Life Sciences, Université de Liège, Belgium
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Current awareness on yeast. Yeast 2009. [DOI: 10.1002/yea.1622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Kucharczyk R, Salin B, di Rago JP. Introducing the human Leigh syndrome mutation T9176G into Saccharomyces cerevisiae mitochondrial DNA leads to severe defects in the incorporation of Atp6p into the ATP synthase and in the mitochondrial morphology. Hum Mol Genet 2009; 18:2889-98. [DOI: 10.1093/hmg/ddp226] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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