Reactome: A Curated Pathway Database

Addition of the third nucleotide on the nascent transcript (R-HSA-75850)

Species Homo sapiens


Formation of the second phosphodiester bond creates a 3-nt product. This short transcript is still loosely associated with the RNA polymerase II initiation complex and can dissociate to yield abortive products, which are not further extended. The transcription complex still requires continued ATP-hydrolysis by TFIIH and remains sensitive to single-stranded oligo-nucleotide inhibition.

The open region (â??transcription bubbleâ??) expands concomitant with the site of RNA-extension. In this case this region spans positions -9 to +3.

Locations in the PathwayBrowser
Additional Information
Compartment nucleoplasm