Dynamic and regulated TAF gene expression during mouse embryonic germ cell development

PLoS Genet. 2020 Jan 8;16(1):e1008515. doi: 10.1371/journal.pgen.1008515. eCollection 2020 Jan.

Abstract

Germ cells undergo many developmental transitions before ultimately becoming either eggs or sperm, and during embryonic development these transitions include epigenetic reprogramming, quiescence, and meiosis. To begin understanding the transcriptional regulation underlying these complex processes, we examined the spatial and temporal expression of TAF4b, a variant TFIID subunit required for fertility, during embryonic germ cell development. By analyzing published datasets and using our own experimental system to validate these expression studies, we determined that both Taf4b mRNA and protein are highly germ cell-enriched and that Taf4b mRNA levels dramatically increase from embryonic day 12.5-18.5. Surprisingly, additional mRNAs encoding other TFIID subunits are coordinately upregulated through this time course, including Taf7l and Taf9b. The expression of several of these germ cell-enriched TFIID genes is dependent upon Dazl and/or Stra8, known regulators of germ cell development and meiosis. Together, these data suggest that germ cells employ a highly specialized and dynamic form of TFIID to drive the transcriptional programs that underlie mammalian germ cell development.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adaptor Proteins, Signal Transducing / genetics
  • Adaptor Proteins, Signal Transducing / metabolism
  • Animals
  • Deleted in Azoospermia 1 Protein / genetics
  • Deleted in Azoospermia 1 Protein / metabolism
  • Gametogenesis*
  • Gene Expression Regulation, Developmental*
  • Germ Cells / cytology
  • Germ Cells / metabolism*
  • Male
  • Mice
  • Mice, Inbred C57BL
  • RNA, Messenger / genetics
  • RNA, Messenger / metabolism
  • TATA-Binding Protein Associated Factors / genetics*
  • TATA-Binding Protein Associated Factors / metabolism
  • Transcription Factor TFIID / genetics*
  • Transcription Factor TFIID / metabolism

Substances

  • Adaptor Proteins, Signal Transducing
  • Deleted in Azoospermia 1 Protein
  • RNA, Messenger
  • Stra8 protein, mouse
  • TATA-Binding Protein Associated Factors
  • Taf4b protein, mouse
  • Transcription Factor TFIID