In the classical Molecular Biology textbooks, the structure of a eukaryotic promoter is usually drawn as containing the typical TATA box, the Inr and sometimes other elements upstream or downstream.

Extensive biochemical, structural and functional analysis has provided quite a complete picture of the General Transcription Factors that recognize promoter features. 

x-ray crystallography and Electron Microscopy, for example, have given us a quite complete view of the PIC.

In the following figures the first complexes resolved are shown. The first presents a short TATA-containing DNA molecule, the TBP and TFIIB. The second has also TFIIA in the complex.

TBP binding to TATA-containing DNA is made with contacts on the minor groove (this is one of the few exception to the major goove rule) and strongly distorts DNA, bending the axis close to 90°.