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Weissert V, Rieger B, Morris S, Arroum T, Psathaki OE, Zobel T, Perkins G, Busch KB. Inhibition of the mitochondrial ATPase function by IF1 changes the spatiotemporal organization of ATP synthase. Biochim Biophys Acta Bioenerg 2021; 1862:148322. [PMID: 33065099 PMCID: PMC7718977 DOI: 10.1016/j.bbabio.2020.148322] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 09/11/2020] [Accepted: 09/29/2020] [Indexed: 01/20/2023]
Abstract
• Mitochondrial F1FO ATP synthase is the key enzyme for mitochondrial bioenergetics. Dimeric F1FO-ATP synthase, is preferentially located at the edges of the cristae and its oligomerization state determines mitochondrial ultrastructure. The ATP synthase inhibitor protein IF1 modulates not only ATP synthase activity but also regulates both the structure and function of mitochondria. In order to understand this in more detail, we have investigated the effect of IF1 on the spatiotemporal organization of the ATP synthase. Stable cell lines were generated that overexpressed IF1 and constitutively active IF1-H49K. The expression of IF1-H49K induced a change in the localization and mobility of the ATP synthase as analyzed by single molecule tracking and localization microscopy (TALM). In addition, the ultrastructure and function of mitochondria in cells with higher levels of active IF1 displayed a gradual alteration. In state III, cristae structures were significantly altered. The inhibition of the hydrolase activity of the F1FO-ATP synthase by IF1 together with altered inner mitochondrial membrane caused re-localization and altered mobility of the enzyme.
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Affiliation(s)
- Verena Weissert
- Center of Cellular Nanoanalytics, Integrated Bioimaging Facility, University of Osnabrück, 49076 Osnabrück, Lower Saxony, Germany
| | - Bettina Rieger
- Institute of Molecular Cell Biology, Department of Biology, University of Muenster, 48149 Muenster, Germany
| | - Silke Morris
- Institute of Molecular Cell Biology, Department of Biology, University of Muenster, 48149 Muenster, Germany
| | - Tasnim Arroum
- Institute of Molecular Cell Biology, Department of Biology, University of Muenster, 48149 Muenster, Germany
| | - Olympia Ekaterini Psathaki
- Center of Cellular Nanoanalytics, Integrated Bioimaging Facility, University of Osnabrück, 49076 Osnabrück, Lower Saxony, Germany
| | - Thomas Zobel
- Imaging Network, Cells in Motion Interfaculty Centre, University of Muenster, 48149 Muenster, Germany
| | - Guy Perkins
- National Center for Microscopy and Imaging Research, University of California, San Diego, CA, USA
| | - Karin B Busch
- Institute of Molecular Cell Biology, Department of Biology, University of Muenster, 48149 Muenster, Germany.
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Salewskij K, Rieger B, Hager F, Arroum T, Duwe P, Villalta J, Colgiati S, Richter CP, Psathaki OE, Enriquez JA, Dellmann T, Busch KB. The spatio-temporal organization of mitochondrial F 1F O ATP synthase in cristae depends on its activity mode. Biochim Biophys Acta Bioenerg 2019; 1861:148091. [PMID: 31669489 DOI: 10.1016/j.bbabio.2019.148091] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 10/02/2019] [Accepted: 10/18/2019] [Indexed: 12/11/2022]
Abstract
F1FO ATP synthase, also known as complex V, is a key enzyme of mitochondrial energy metabolism that can synthesize and hydrolyze ATP. It is not known whether the ATP synthase and ATPase function are correlated with a different spatio-temporal organisation of the enzyme. In order to analyze this, we tracked and localized single ATP synthase molecules in situ using live cell microscopy. Under normal conditions, complex V was mainly restricted to cristae indicated by orthogonal trajectories along the cristae membranes. In addition confined trajectories that are quasi immobile exist. By inhibiting glycolysis with 2-DG, the activity and mobility of complex V was altered. The distinct cristae-related orthogonal trajectories of complex V were obliterated. Moreover, a mobile subpopulation of complex V was found in the inner boundary membrane. The observed changes in the ratio of dimeric/monomeric complex V, respectively less mobile/more mobile complex V and its activity changes were reversible. In IF1-KO cells, in which ATP hydrolysis is not inhibited by IF1, complex V was more mobile, while inhibition of ATP hydrolysis by BMS-199264 reduced the mobility of complex V. Taken together, these data support the existence of different subpopulations of complex V, ATP synthase and ATP hydrolase, the latter with higher mobility and probably not prevailing at the cristae edges. Obviously, complex V reacts quickly and reversibly to metabolic conditions, not only by functional, but also by spatial and structural reorganization.
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Affiliation(s)
- Kirill Salewskij
- University Münster, Department of Biology, Institute of Molecular Cell Biology, 48149 Münster, North Rhine-Westphalia, Germany
| | - Bettina Rieger
- University Münster, Department of Biology, Institute of Molecular Cell Biology, 48149 Münster, North Rhine-Westphalia, Germany
| | - Frances Hager
- University Münster, Department of Biology, Institute of Molecular Cell Biology, 48149 Münster, North Rhine-Westphalia, Germany
| | - Tasnim Arroum
- University Münster, Department of Biology, Institute of Molecular Cell Biology, 48149 Münster, North Rhine-Westphalia, Germany
| | - Patrick Duwe
- University Münster, Department of Biology, Institute of Molecular Cell Biology, 48149 Münster, North Rhine-Westphalia, Germany
| | - Jimmy Villalta
- University Münster, Department of Biology, Institute of Molecular Cell Biology, 48149 Münster, North Rhine-Westphalia, Germany
| | - Sara Colgiati
- Centro Nacional de Investigaciones Cardiovasculares Carlos III, 28029 Madrid, Catania, Spain; Institute of Nutrition and Food Technology, Biomedical Research Centre, Department of Physiology, University of Granada, Granada, Andalusia, Spain
| | - Christian P Richter
- University of Osnabrück, School of Biology, University of Osnabrück, 49076 Osnabrück, Lower Saxony, Germany; Center of Cellular Nanoanalytics, Integrated Bioimaging Facility, University of Osnabrück, 49076 Osnabrück, Lower Saxony, Germany
| | - Olympia E Psathaki
- University of Osnabrück, School of Biology, University of Osnabrück, 49076 Osnabrück, Lower Saxony, Germany; Center of Cellular Nanoanalytics, Integrated Bioimaging Facility, University of Osnabrück, 49076 Osnabrück, Lower Saxony, Germany
| | - José A Enriquez
- Centro Nacional de Investigaciones Cardiovasculares Carlos III, 28029 Madrid, Catania, Spain
| | - Timo Dellmann
- University Münster, Department of Biology, Institute of Molecular Cell Biology, 48149 Münster, North Rhine-Westphalia, Germany
| | - Karin B Busch
- University Münster, Department of Biology, Institute of Molecular Cell Biology, 48149 Münster, North Rhine-Westphalia, Germany.
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