title: The Assembly Factor SDHAF2 Is Dispensable for Flavination of the Catalytic Subunit of Mitochondrial Complex II in Breast Cancer Cells.
abstract: Mitochondrial complex II or succinate dehydrogenase (SDH) is at the crossroads of oxidative phosphorylation and the tricarboxylic acid cycle. It has been shown that Sdh5 (SDHAF2/SDH5 in mammals) is required for flavination of the subunit Sdh1 (SDHA in human cells) in yeast. Here we demonstrate that in human breast cancer cells, SDHAF2/SDH5 is dispensable for SDHA flavination. In contrast to yeast, CRISPR-Cas9 nickase-mediated SDHAF2 KO breast cancer cells feature flavinated SDHA and retain fully assembled and functional complex II, as well as normal mitochondrial respiration. Our data show that SDHA flavination is independent of SDHAF2 in breast cancer cells, employing an alternative mechanism.
authors: From the School of Medical Science, Griffith University, Southport, 4222 Queensland, Australia and a.bezawork-geleta@griffith.edu.au.
authors: Ayenachew
authors: A
authors: Bezawork-Geleta
authors: From the School of Medical Science, Griffith University, Southport, 4222 Queensland, Australia and.
authors: Lanfeng
authors: L
authors: Dong
authors: the Institute of Biotechnology, Czech Academy of Sciences, 252 50 Prague-West, Czech Republic.
authors: Jakub
authors: J
authors: Rohlena
authors: From the School of Medical Science, Griffith University, Southport, 4222 Queensland, Australia and j.neuzil@griffith.edu.au.|the Institute of Biotechnology, Czech Academy of Sciences, 252 50 Prague-West, Czech Republic.
authors: Jiri
authors: J
authors: Neuzil
mesh_terms: D001943:Breast Neoplasms / Q000235:genetics / Q000378:metabolism*; D045744:Cell Line, Tumor; D042963:Electron Transport Complex II / Q000235:genetics / Q000378:metabolism*; D005260:Female; D005415:Flavins; D055785:Gene Knockdown Techniques; D006801:Humans; D008928:Mitochondria / Q000235:genetics / Q000378:metabolism*; D024101:Mitochondrial Proteins / Q000235:genetics / Q000378:metabolism*; D009363:Neoplasm Proteins / Q000235:genetics / Q000378:metabolism*; D011499:Protein Processing, Post-Translational
chemical_list: D005415:Flavins; D024101:Mitochondrial Proteins; D009363:Neoplasm Proteins; C543341:SDHAF2 protein, human; D042963:Electron Transport Complex II; C511268:SDHA protein, human
keywords: SDH assembly factor; SDHA; SDHAF2; assembly factor; cancer biology; cancer cells; cell biology; complex II assembly; flavin adenine dinucleotide; flavination; flavinylation; mammal; mitochondria; mitochondrial complex II; mitochondrial respiratory chain complex; succinate dehydrogenase