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. Author manuscript; available in PMC: 2018 Feb 1.
Published in final edited form as: Bioessays. 2017 Jan 4;39(2):10.1002/bies.201600193. doi: 10.1002/bies.201600193

Figure 1.

Figure 1

Promoter elements and RNA polymerase regions responsible for recognition of each promoter element. A: Regions of core (αCTD and β) and σ70 that make sequence-specific interactions with promoter DNA are indicated above the DNA elements with which they interact. The transcription start site (TSS) is shown as a bent arrow. αCTD (carboxyl-terminal domain of α subunit; -35 (-35 hexamer), Ext (extended -10 element), -10 (-10 hexamer), Dis (discriminator element), CRE (core recognition element). B: rrnB P1 and consensus sequence for σ70-dependent promoters. rrnB P1 bases identical to the consensus sequence are indicated. Promoter elements are colored as in (A). W=A or T, n= any base. Spacing between -35 and extended -10 and between discriminator element and TSS are indicated by brackets. The number of bp separating elements is indicated.