{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\n The ATP5MF‐PTCD1 gene product plays a critical role in the post‐transcriptional regulation of mitochondrial gene expression. Functional studies indicate that the PTCD1 portion is central to processing and stabilizing mitochondrial RNAs—especially in modulating the 3′ end processing of tRNAs and controlling mitochondrial leucine tRNA levels—which in turn influences the efficiency and coordination of mitochondrial translation."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": ""}]}, {"type": "t", "text": "\n \n "}, {"type": "p", "children": [{"type": "t", "text": "\n Mouse knockout and haploinsufficiency models further reveal that reduced levels of PTCD1 lead to defects in mitoribosome assembly and respiratory chain biogenesis, which manifest as impaired oxidative phosphorylation. Such mitochondrial dysfunction has been linked to metabolic abnormalities, including adult‐onset obesity, liver steatosis and cardiac hypertrophy, thereby highlighting the integral role of this protein in maintaining energy homeostasis."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "3"}]}, {"type": "t", "text": ""}]}, {"type": "t", "text": "\n \n "}, {"type": "p", "children": [{"type": "t", "text": "\n Moreover, genetic studies have associated variants in PTCD1 with neurodegenerative diseases such as Alzheimer’s disease, underscoring the broader clinical relevance of mitochondrial RNA regulation in human pathology."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "5"}]}, {"type": "t", "text": "\n "}]}, {"type": "t", "text": "\n \n "}, {"type": "p", "children": [{"type": "t", "text": "\n Although the available abstracts do not explicitly dissect the role of the ATP5MF portion, the ATP5MF‐PTCD1 nomenclature suggests that this locus may integrate features of ATP synthase assembly/function with those of mitochondrial RNA metabolism. In this context, the ATP5MF‐PTCD1 chimeric product is poised to coordinate the energy production machinery with the post‐transcriptional control of mitochondrial gene expression—a critical nexus ensuring effective oxidative phosphorylation and cellular homeostasis.\n "}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Maria I G Lopez Sanchez, Tim R Mercer, Stefan M K Davies, et al. 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"}, {"type": "b", "children": [{"type": "t", "text": "Mitochondrial leucine tRNA level and PTCD1 are regulated in response to leucine starvation."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Amino Acids (2014)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1007/s00726-014-1730-2"}], "href": "https://doi.org/10.1007/s00726-014-1730-2"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "24710704"}], "href": "https://pubmed.ncbi.nlm.nih.gov/24710704"}]}, {"type": "r", "ref": 3, "children": [{"type": "t", "text": "Kara L Perks, Nicola Ferreira, Tara R Richman, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Adult-onset obesity is triggered by impaired mitochondrial gene expression."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Sci Adv (2017)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1126/sciadv.1700677"}], "href": "https://doi.org/10.1126/sciadv.1700677"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "28835921"}], "href": "https://pubmed.ncbi.nlm.nih.gov/28835921"}]}, {"type": "r", "ref": 4, "children": [{"type": "t", "text": "Kara L Perks, Nicola Ferreira, Judith A Ermer, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Reduced mitochondrial translation prevents diet-induced metabolic dysfunction but not inflammation."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Aging (Albany NY) (2020)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.18632/aging.104010"}], "href": "https://doi.org/10.18632/aging.104010"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "33024056"}], "href": "https://pubmed.ncbi.nlm.nih.gov/33024056"}]}, {"type": "r", "ref": 5, "children": [{"type": "t", "text": "Judy Pa, Shea J Andrews, Russell H Swerdlow "}, {"type": "b", "children": [{"type": "t", "text": "Mitochondria and Alzheimer's: Is PTCD1 the Smoking Gun?"}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Trends Neurosci (2019)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1016/j.tins.2019.08.003"}], "href": "https://doi.org/10.1016/j.tins.2019.08.003"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "31421943"}], "href": "https://pubmed.ncbi.nlm.nih.gov/31421943"}]}]}]}