Abstract
Transcription elongation is stimulated by positive transcription elongation factor b (P-TEFb), for which activity is repressed in the 7SK small nuclear ribonucleoprotein (7SK snRNP) complex. We show here a critical role of 7SK snRNP in growth control of primordial germ cells (PGCs). The expression of p15INK4b, a cyclin-dependent kinase inhibitor (CDKI) gene, in PGCs is selectively activated by P-TEFb and its recruiting molecule, Brd4, when the amount of active P-TEFb is increased due to reduction of the 7SK snRNP, and PGCs consequently undergo growth arrest. These results indicate that CDKI gene-specific control of transcription by 7SK snRNP plays a pivotal role in the maintenance of PGC proliferation.
Original language | English (US) |
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Pages (from-to) | 2477-2482 |
Number of pages | 6 |
Journal | Genes and Development |
Volume | 26 |
Issue number | 22 |
DOIs | |
State | Published - Nov 15 2012 |
Externally published | Yes |
Keywords
- 7SK snRNP
- CDK inhibitor
- Larp7
- P-TEFb
- Primordial germ cell
- Transcription
ASJC Scopus subject areas
- Genetics
- Developmental Biology