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Your search keyword '"Johan L. K. Van Hove"' showing total 3 results
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3 results on '"Johan L. K. Van Hove"'

1. Mitochondrial calcium uniporter stabilization preserves energetic homeostasis during Complex I impairment

Author

Enrique Balderas, David R. Eberhardt, Sandra Lee, John M. Pleinis, Salah Sommakia, Anthony M. Balynas, Xue Yin, Mitchell C. Parker, Colin T. Maguire, Scott Cho, Marta W. Szulik, Anna Bakhtina, Ryan D. Bia, Marisa W. Friederich, Timothy M. Locke, Johan L. K. Van Hove, Stavros G. Drakos, Yasemin Sancak, Martin Tristani-Firouzi, Sarah Franklin, Aylin R. Rodan, and Dipayan Chaudhuri

Subjects
Science
Abstract

Mitochondrial complex I deficiency is frequent in congenital, neurologic and cardiovascular disease. Here the authors demonstrate that Complex I stimulates the turnover of a mitochondrial calcium channel, which becomes stabilized during Complex I deficiency, preserving energetic homeostasis.

Published
2022
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2. Author Correction: Mitochondrial calcium uniporter stabilization preserves energetic homeostasis during Complex I impairment

Author

Enrique Balderas, David R. Eberhardt, Sandra Lee, John M. Pleinis, Salah Sommakia, Anthony M. Balynas, Xue Yin, Mitchell C. Parker, Colin T. Maguire, Scott Cho, Marta W. Szulik, Anna Bakhtina, Ryan D. Bia, Marisa W. Friederich, Timothy M. Locke, Johan L. K. Van Hove, Stavros G. Drakos, Yasemin Sancak, Martin Tristani-Firouzi, Sarah Franklin, Aylin R. Rodan, and Dipayan Chaudhuri

Subjects
Science
Published
2022
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3. Pathogenic variants in glutamyl-tRNAGln amidotransferase subunits cause a lethal mitochondrial cardiomyopathy disorder

Author

Marisa W. Friederich, Sharita Timal, Christopher A. Powell, Cristina Dallabona, Alina Kurolap, Sara Palacios-Zambrano, Drago Bratkovic, Terry G. J. Derks, David Bick, Katelijne Bouman, Kathryn C. Chatfield, Nadine Damouny-Naoum, Megan K. Dishop, Tzipora C. Falik-Zaccai, Fuad Fares, Ayalla Fedida, Ileana Ferrero, Renata C. Gallagher, Rafael Garesse, Micol Gilberti, Cristina González, Katherine Gowan, Clair Habib, Rebecca K. Halligan, Limor Kalfon, Kaz Knight, Dirk Lefeber, Laura Mamblona, Hanna Mandel, Adi Mory, John Ottoson, Tamar Paperna, Ger J. M. Pruijn, Pedro F. Rebelo-Guiomar, Ann Saada, Bruno Sainz, Hayley Salvemini, Mirthe H. Schoots, Jan A. Smeitink, Maciej J. Szukszto, Hendrik J. ter Horst, Frans van den Brandt, Francjan J. van Spronsen, Joris A. Veltman, Eric Wartchow, Liesbeth T. Wintjes, Yaniv Zohar, Miguel A. Fernández-Moreno, Hagit N. Baris, Claudia Donnini, Michal Minczuk, Richard J. Rodenburg, and Johan L. K. Van Hove

Subjects
Science
Abstract

Abstract Mitochondrial protein synthesis requires charging mt-tRNAs with their cognate amino acids by mitochondrial aminoacyl-tRNA synthetases, with the exception of glutaminyl mt-tRNA (mt-tRNAGln). mt-tRNAGln is indirectly charged by a transamidation reaction involving the GatCAB aminoacyl-tRNA amidotransferase complex. Defects involving the mitochondrial protein synthesis machinery cause a broad spectrum of disorders, with often fatal outcome. Here, we describe nine patients from five families with genetic defects in a GatCAB complex subunit, including QRSL1, GATB, and GATC, each showing a lethal metabolic cardiomyopathy syndrome. Functional studies reveal combined respiratory chain enzyme deficiencies and mitochondrial dysfunction. Aminoacylation of mt-tRNAGln and mitochondrial protein translation are deficient in patients’ fibroblasts cultured in the absence of glutamine but restore in high glutamine. Lentiviral rescue experiments and modeling in S. cerevisiae homologs confirm pathogenicity. Our study completes a decade of investigations on mitochondrial aminoacylation disorders, starting with DARS2 and ending with the GatCAB complex.

Published
2018
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