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Abstract During spermatogenesis, the unsynapsed XY chromosomes undergo meiotic sex chromosome inactivation (MSCI) and form a heterochromatic XY body. Defects in MSCI lead to meiotic arrest and male infertility. Although DNA damage response (DDR) factors are established as key initiators of MSCI, how transcriptional silencing is subsequently achieved remains elusive. Here, we identify the nucleolar components NPM1, SENP3, and rRNA as essential downstream effectors of DDR signaling in MSCI.
As a journalist, you can create a free Muck Rack account to customize your profile, list your contact preferences, and upload a portfolio of your best work.
