bims-mitran Biomed News
on Mitochondrial translation
Issue of 2025–03–02
two papers selected by
Andreas Kohler, Umeå University



  1. Biol Cell. 2025 Feb;117(2): e12007
      Mitochondria, as the central hub of cellular energy metabolism and a critical regulator of signaling pathways, play indispensable roles in spermatogenesis and sperm function. In recent years, the mechanisms by which RNA-binding proteins regulate reproductive development and gametogenesis have emerged as a focal point in mitochondrial biology. Here, we review the latest progresses on the role of mitochondrial translation and its associated ribosomal regulation in sperm formation and activation. In Caenorhabditis elegans, the RNA-binding protein complex AMG-1/SLRP-1 modulates key processes of sperm development by maintaining mitochondrial homeostasis. Furthermore, we explore the distinct roles of mitochondrial translation and metabolic functions in sperm activation and motility. This review summarizes the mechanisms by which mitochondrial ribosomal regulation governs spermatogenesis and sperm function, offering a foundation for future investigations in reproductive biology.
    Keywords:  AMG‐1/SLRP‐1 complex; RNA‐binding proteins; male infertility; mitochondrial ribosomes; spermatogenesis
    DOI:  https://doi.org/10.1111/boc.12007
  2. Trends Cell Biol. 2025 Feb 25. pii: S0962-8924(25)00036-4. [Epub ahead of print]
      Tight mitochondria-endoplasmic reticulum (ER) contacts (MERCS) play essential roles in cellular homeostasis. Brar et al. reveal a novel mechanism where mitochondrial mRNAs escape global translational repression at novel context-specific MERCS during ER stress, uncovering spatially regulated translation as a critical adaptive strategy to cope with cellular stress.
    Keywords:  ATAD3A; PERK; endoplasmic reticulum stress; mitochondria–ER contact sites (MERCS); spatial translation regulation
    DOI:  https://doi.org/10.1016/j.tcb.2025.02.002