Article
A model of repression: CTD analogs and PIE-1 inhibit transcriptional elongation by P-TEFb.
Genes & development - 15 Mar 2003
Zhang Fan, Barboric Matjaz, Blackwell T Keith, Peterlin B Matija
Abstract excerpt
The positive transcription elongation factor b (P-TEFb) contains cyclin T1 (CycT1) and cyclin-dependent kinase 9 (Cdk9). For activating the expression of eukaryotic genes, the histidine-rich sequence in CycT1 binds the heptapeptide repeats in the C-terminal domain (CTD) of RNA polymerase II (RNAPII), whereupon Cdk9 phosphorylates the CTD. We found that alanine-substituted heptapeptide repeats that cannot be...
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