4.5 Article

Coxfa4l3, a novel mitochondrial electron transport chain Complex 4 subunit protein, switches from Coxfa4 during spermatogenesis

Journal

MITOCHONDRION
Volume 52, Issue -, Pages 1-7

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.mito.2020.02.003

Keywords

Spermatogenesis; Electron transport chain; Hypoxia

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We identified Coxfa4l3, previously called Cl 5orf48 or Nmesl, as a novel accessory protein of Complex IV of the mitochondrial electron transport chain (ETC). Amino acid sequence comparison, the intracellular localization and the protein expression data showed that the protein is the third isoform of Coxfa4 and the expression of Coxfa4 and Coxfa4l3 proteins during spermatogenesis showed a mutually exclusive pattern, implying that Coxfa4 replaces Coxfa4l3 in Complex IV after meiosis. These results may provide some insight into the unique mechanism of ATP production in late spermatogenesis.

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