Difference between revisions of "Macchi 2013 J Cell Sci"
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{{Publication | {{Publication | ||
|title=Macchi M, El Fissi N, Tufi R, Bentobji M, Liévens JC, Martins LM, Royet J, Rival T (2013) The Drosophila inner-membrane protein PMI controls crista biogenesis and mitochondrial diameter. J Cell Sci 126:814-24. | |title=Macchi M, El Fissi N, Tufi R, Bentobji M, Liévens JC, Martins LM, Royet J, Rival T (2013) The ''Drosophila'' inner-membrane protein PMI controls crista biogenesis and mitochondrial diameter. J Cell Sci 126:814-24. | ||
|info=[http://www.ncbi.nlm.nih.gov/pubmed/23264743 PMID: 23264743] | |info=[http://www.ncbi.nlm.nih.gov/pubmed/23264743 PMID: 23264743] | ||
|authors=Macchi M, El Fissi N, Tufi R, Bentobji M, Lievens JC, Martins LM, Royet J, Rival T | |authors=Macchi M, El Fissi N, Tufi R, Bentobji M, Lievens JC, Martins LM, Royet J, Rival T | ||
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|journal=J Cell Sci | |journal=J Cell Sci | ||
|abstract=Cristae are mitochondrial inner-membrane structures that concentrate respiratory chain complexes and hence regulate ATP production. Mechanisms controlling crista morphogenesis are poorly understood and few crista determinants have been identified. Among them are the Mitofilins that are required to establish crista junctions and ATP-synthase subunits that bend the membrane at the tips of the cristae. We report here the phenotypic consequences associated with the ''in vivo'' inactivation of the inner-membrane protein Pantagruelian Mitochondrion I (PMI) both at the scale of the whole organism, and at the level of mitochondrial ultrastructure and function. We show that flies in which PMI is genetically inactivated experience synaptic defects and have a reduced life span. Electron microscopy analysis of the inner-membrane morphology demonstrates that loss of PMI function increases the average length of mitochondrial cristae in embryonic cells. This phenotype is exacerbated in adult neurons in which cristae form a dense tangle of elongated membranes. Conversely, we show that PMI overexpression is sufficient to reduce crista length ''in vivo''. Finally, these crista defects are associated with impaired respiratory chain activity and increases in the level of reactive oxygen species. Since PMI and its human orthologue TMEM11 are regulators of mitochondrial morphology, our data suggest that, by controlling crista length, PMI influences mitochondrial diameter and tubular shape. | |abstract=Cristae are mitochondrial inner-membrane structures that concentrate respiratory chain complexes and hence regulate ATP production. Mechanisms controlling crista morphogenesis are poorly understood and few crista determinants have been identified. Among them are the Mitofilins that are required to establish crista junctions and ATP-synthase subunits that bend the membrane at the tips of the cristae. We report here the phenotypic consequences associated with the ''in vivo'' inactivation of the inner-membrane protein Pantagruelian Mitochondrion I (PMI) both at the scale of the whole organism, and at the level of mitochondrial ultrastructure and function. We show that flies in which PMI is genetically inactivated experience synaptic defects and have a reduced life span. Electron microscopy analysis of the inner-membrane morphology demonstrates that loss of PMI function increases the average length of mitochondrial cristae in embryonic cells. This phenotype is exacerbated in adult neurons in which cristae form a dense tangle of elongated membranes. Conversely, we show that PMI overexpression is sufficient to reduce crista length ''in vivo''. Finally, these crista defects are associated with impaired respiratory chain activity and increases in the level of reactive oxygen species. Since PMI and its human orthologue TMEM11 are regulators of mitochondrial morphology, our data suggest that, by controlling crista length, PMI influences mitochondrial diameter and tubular shape. | ||
|keywords=Cristae, Drosophila, Mitochondrial morphogenesis, Oxidative metabolism | |keywords=Cristae, ''Drosophila'', Mitochondrial morphogenesis, Oxidative metabolism | ||
|mipnetlab=UK Leicester Martins LM | |mipnetlab=UK Leicester Martins LM | ||
}} | }} | ||
{{Labeling | {{Labeling | ||
|area=Respiration, mt-Structure;fission;fusion, Genetic knockout;overexpression | |area=Respiration, mt-Structure;fission;fusion, Genetic knockout;overexpression | ||
|organism=Drosophila | |||
|taxonomic group=Hexapods | |taxonomic group=Hexapods | ||
|couplingstates=OXPHOS | |couplingstates=OXPHOS | ||
Revision as of 15:37, 5 March 2015
| Macchi M, El Fissi N, Tufi R, Bentobji M, Liévens JC, Martins LM, Royet J, Rival T (2013) The Drosophila inner-membrane protein PMI controls crista biogenesis and mitochondrial diameter. J Cell Sci 126:814-24. |
Macchi M, El Fissi N, Tufi R, Bentobji M, Lievens JC, Martins LM, Royet J, Rival T (2013) J Cell Sci
Abstract: Cristae are mitochondrial inner-membrane structures that concentrate respiratory chain complexes and hence regulate ATP production. Mechanisms controlling crista morphogenesis are poorly understood and few crista determinants have been identified. Among them are the Mitofilins that are required to establish crista junctions and ATP-synthase subunits that bend the membrane at the tips of the cristae. We report here the phenotypic consequences associated with the in vivo inactivation of the inner-membrane protein Pantagruelian Mitochondrion I (PMI) both at the scale of the whole organism, and at the level of mitochondrial ultrastructure and function. We show that flies in which PMI is genetically inactivated experience synaptic defects and have a reduced life span. Electron microscopy analysis of the inner-membrane morphology demonstrates that loss of PMI function increases the average length of mitochondrial cristae in embryonic cells. This phenotype is exacerbated in adult neurons in which cristae form a dense tangle of elongated membranes. Conversely, we show that PMI overexpression is sufficient to reduce crista length in vivo. Finally, these crista defects are associated with impaired respiratory chain activity and increases in the level of reactive oxygen species. Since PMI and its human orthologue TMEM11 are regulators of mitochondrial morphology, our data suggest that, by controlling crista length, PMI influences mitochondrial diameter and tubular shape. • Keywords: Cristae, Drosophila, Mitochondrial morphogenesis, Oxidative metabolism
• O2k-Network Lab: UK Leicester Martins LM
Labels: MiParea: Respiration, mt-Structure;fission;fusion, Genetic knockout;overexpression
Organism: Drosophila
Coupling state: OXPHOS
HRR: Oxygraph-2k
