{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,17]],"date-time":"2026-06-17T02:35:27Z","timestamp":1781663727269,"version":"3.54.5"},"reference-count":58,"publisher":"Oxford University Press (OUP)","issue":"19","license":[{"start":{"date-parts":[[2025,7,18]],"date-time":"2025-07-18T00:00:00Z","timestamp":1752796800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2025,9,19]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>SCO1 is a nuclear-encoded protein with roles in cytochrome c oxidase (COX) assembly and the regulation of copper homeostasis. It remains unclear, however, why mutations in this ubiquitously expressed gene product cause distinct, tissue-specific forms of disease that primarily affect heart, liver or brain function. To gain a better understanding of the clinical heterogeneity observed across SCO1 pedigrees, we deleted Sco1 in the murine brain and observed a severe COX deficiency in the absence of altered tissue copper content that was tied to early, neonatal lethality. We therefore transitioned to whole body knockin mice expressing allelic variants of SCO1 that are pathogenic in humans to more accurately reflect the patient condition and avoid the lethality associated with tissue-specific Sco1 knockout. Sco1M277V mice exhibited the most severe COX deficiency in their brain, modeling the pathophysiological consequences of the p.Met294Val variant in humans and supporting the idea that the primary role of SCO1 in this tissue is to promote COX assembly. Phenotyping of Sco1G115S, Sco1P157L and Sco1M277V mice nonetheless emphasized that the heart generally displayed the most severe, combined COX and copper deficiency, with Sco1G115S and Sco1P157L hearts developing a dilated cardiomyopathy that was accompanied by significant depletion of their mitochondrial copper pool. Taken together, our findings suggest that in an isogenic context the heart is the most susceptible organ to loss of SCO1 function, and that single nucleotide polymorphisms at modifier loci in an outbred population likely contribute to the clinical heterogeneity observed across SCO1 pedigrees.<\/jats:p>","DOI":"10.1093\/hmg\/ddaf123","type":"journal-article","created":{"date-parts":[[2025,7,18]],"date-time":"2025-07-18T12:42:55Z","timestamp":1752842575000},"page":"1599-1609","source":"Crossref","is-referenced-by-count":2,"title":["Heart is the most susceptible organ in an isogenic background to loss of function mutations in the mitochondrial metallochaperone SCO1"],"prefix":"10.1093","volume":"34","author":[{"given":"Sampurna","family":"Ghosh","sequence":"first","affiliation":[{"name":"Department of Biochemistry, Microbiology and Immunology, College of Medicine, University of Saskatchewan , 107 Wiggins Road, Saskatoon, SK S7N5E5 \u00a0","place":["Canada"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kimberly A","family":"Jett","sequence":"additional","affiliation":[{"name":"Department of Biochemistry, Microbiology and Immunology, College of Medicine, University of Saskatchewan , 107 Wiggins Road, Saskatoon, SK S7N5E5 \u00a0","place":["Canada"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zakery N","family":"Baker","sequence":"additional","affiliation":[{"name":"Department of Biochemistry, Microbiology and Immunology, College of Medicine, University of Saskatchewan , 107 Wiggins Road, Saskatoon, SK S7N5E5 \u00a0","place":["Canada"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Aren","family":"Boulet","sequence":"additional","affiliation":[{"name":"Department of Biochemistry, Microbiology and Immunology, College of Medicine, University of Saskatchewan , 107 Wiggins Road, Saskatoon, SK S7N5E5 \u00a0","place":["Canada"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Amzad","family":"Hossain","sequence":"additional","affiliation":[{"name":"Department of Biochemistry, Microbiology and Immunology, College of Medicine, University of Saskatchewan , 107 Wiggins Road, Saskatoon, SK S7N5E5 \u00a0","place":["Canada"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stanley A","family":"Moore","sequence":"additional","affiliation":[{"name":"Department of Biochemistry, Microbiology and Immunology, College of Medicine, University of Saskatchewan , 107 Wiggins Road, Saskatoon, SK S7N5E5 \u00a0","place":["Canada"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Martina","family":"Ralle","sequence":"additional","affiliation":[{"name":"Department of Molecular and Medical Genetics, Oregon Health and Science University , 3181 S.W. Sam Jackson Park Road, Portland, OR 97296 \u00a0","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Binbing","family":"Ling","sequence":"additional","affiliation":[{"name":"Department of Biochemistry, Microbiology and Immunology, College of Medicine, University of Saskatchewan , 107 Wiggins Road, Saskatoon, SK S7N5E5 \u00a0","place":["Canada"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Paul A","family":"Cobine","sequence":"additional","affiliation":[{"name":"Department of Biological Sciences, Auburn University , 315 Roosevelt Concourse, Auburn, AL 36849 \u00a0","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8488-7822","authenticated-orcid":false,"given":"Scot C","family":"Leary","sequence":"additional","affiliation":[{"name":"Department of Biochemistry, Microbiology and Immunology, College of Medicine, University of Saskatchewan , 107 Wiggins Road, 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