Recognition of the Promoter site
by RNAPol
The RNAPol
molecule recognizes the beginning of a transcriptional unit of
an mRNA as a short DNA
sequence motif called
a Promoter.
The Promoter is
approximately 10 bp 'upstream'
[5' to] the start site of
transcription on the template strand. The
same or similar "- 10" motif sequence is found
upstream of many genes, and acts as a signal for
transcription.
It is important to remember
that the "start site"
for RNA transcription from DNA is not the same as the
"start
codon" for Protein translation
from mRNA.
Figure © 2000 by Griffiths et al. ; text © 2024 by Steven M. Carr