Nuclear post-transcriptional control of gene expression.

The mammalian nucleus has considerable control over nascent transcripts. The basic mechanisms of post-transcriptional processing are well understood and recently some of the principles underlying the regulation of nuclear processing events have been elucidated. Here we review the recent progress in identification of signalling pathways that modulate the action of key RNA-binding proteins which regulate splicing, and the mechanisms of action of the C-terminal domain of RNA polymerase II that co-ordinate transcription with nuclear mRNA processing events.