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| mitochondrion | |
|---|---|
| Name | Mitochondrion |
| System | Cellular biology |
| Location | Cytoplasm |
| Function | ATP production, metabolism, apoptosis |
mitochondrion
The mitochondrion is a subcellular organelle found in eukaryotic cells that performs oxidative phosphorylation and integrates metabolic signaling. It is central to cellular energy conversion, participates in programmed cell death, and influences cellular physiology across tissues such as those studied at Harvard University, Max Planck Society, National Institutes of Health, Stanford University, and MIT. Research on the organelle involves techniques developed at institutions including Cold Spring Harbor Laboratory, Salk Institute, Rockefeller University, Cambridge University, and Karolinska Institutet.
Mitochondria display a double-membrane architecture with an outer membrane and an inner membrane folded into cristae, described in classic ultrastructural work at University of California, Berkeley, Yale University, Columbia University, University of Oxford, and University of Chicago. Electron microscopy advances at EMBL, Max Planck Institute for Biophysical Chemistry, Johns Hopkins University, University of Cambridge, and University College London revealed variations in size, shape, and cristae density correlated with cell types from organs such as Woods Hole Oceanographic Institution-studied marine tissues to mammalian cardiac muscle explored at Cleveland Clinic and Mayo Clinic. The intermembrane space, matrix, and inner membrane protein complexes were mapped using approaches from Wellcome Trust, Howard Hughes Medical Institute, European Molecular Biology Laboratory, Weizmann Institute of Science, and Riken.
The organelle generates ATP via oxidative phosphorylation mediated by respiratory complexes I–IV and ATP synthase, principles elaborated in biochemical traditions at University of Göttingen, Sorbonne University, ETH Zurich, University of Tokyo, and University of Toronto. Electron transport couples to proton motive force and chemiosmotic theory advanced by researchers affiliated with University of Cambridge (UK), Columbia Presbyterian Medical Center, University of Wisconsin–Madison, University of California, San Francisco, and Imperial College London. Mitochondrial roles include fatty acid β-oxidation, citric acid cycle activity traced to work at University of Pennsylvania, University of Michigan, Karolinska Institutet, University of Edinburgh, and University of Melbourne and calcium buffering explored in labs at University of California, San Diego, Duke University, University of Pittsburgh, University of Basel, and École Normale Supérieure.
Mitochondrial DNA exhibits maternal inheritance patterns documented in studies from University of Oxford, University of Cambridge, University of California, Los Angeles, Rutgers University, and McMaster University. Human mitochondrial genome sequencing projects led by teams at National Human Genome Research Institute, Wellcome Trust Sanger Institute, Broad Institute, European Bioinformatics Institute, and Genoscope clarified gene content, copy number variation, and heteroplasmy. Clinical genetics centers at Mayo Clinic, Johns Hopkins University Hospital, Great Ormond Street Hospital, Cleveland Clinic, and UCLA Medical Center diagnose pathogenic variants causing syndromes identified in cohorts curated by NIH Clinical Center, Hospital for Sick Children (SickKids), Massachusetts General Hospital, Sheba Medical Center, and Royal Free Hospital.
Mitochondrial biogenesis, fusion, and fission are regulated by nuclear-encoded factors studied at European Molecular Biology Laboratory (EMBL), Whitehead Institute, Scripps Research Institute, Karolinska Institutet, and Max Planck Institute for Biology of Ageing. Proteins such as dynamin-related GTPases were characterized in labs at University of California, Irvine, University of British Columbia, University of Copenhagen, Vanderbilt University, and Seoul National University. Quality control pathways including mitophagy were elucidated through work at Buck Institute for Research on Aging, University of Cambridge Metabolic Research Laboratories, University of Helsinki, Osaka University, and Monash University.
Mitochondrial dysfunction contributes to disorders ranging from primary mitochondrial myopathies to common conditions including neurodegenerative diseases researched at Massachusetts General Hospital, Johns Hopkins Medicine, Mayo Clinic, Mount Sinai Health System, and UCL Queen Square Institute of Neurology. Links to Parkinsonian syndromes were advanced by investigators at Institute of Neurology (UCL), National Institute of Neurological Disorders and Stroke, University of California, San Diego, University of Sheffield, and University College London Hospitals. Metabolic diseases, cancer metabolism, and aging involving mitochondrial pathways are central topics at National Cancer Institute, Dana-Farber Cancer Institute, Memorial Sloan Kettering Cancer Center, Fred Hutchinson Cancer Center, and Roswell Park Comprehensive Cancer Center.
The endosymbiotic hypothesis proposing an alphaproteobacterial ancestor was popularized by researchers connected to Princeton University, University of California, Berkeley, Harvard University, University of Chicago, and Stanford University. Comparative genomics and phylogenetics from teams at Sanger Institute, European Bioinformatics Institute, Max Planck Institute for Evolutionary Anthropology, University of Vienna, and McDonald Institute for Archaeological Research have traced mitochondrial ancestry to bacterial lineages studied in collections at Smithsonian Institution, Natural History Museum, London, Muséum national d'Histoire naturelle, American Museum of Natural History, and Museum für Naturkunde Berlin.
Techniques for studying the organelle include transmission electron microscopy developed at Instituto de Investigaciones Biomédicas, fluorescence microscopy advances from Howard Hughes Medical Institute, super-resolution imaging at NIH Imaging Core, proteomics from ProteomeXchange Consortium, and single-cell genomics pioneered at Broad Institute, Wellcome Sanger Institute, Harvard Medical School, Johns Hopkins University, and European Molecular Biology Laboratory. Clinical and translational applications such as mitochondrial replacement therapy, gene therapy trials, and metabolic interventions are being investigated through collaborations involving FDA, European Medicines Agency, World Health Organization, Wellcome Trust, and Bill & Melinda Gates Foundation.
Category:Cell organelles