A. Binding sites for TFIID lobes on promoter DNA. Lobe C binds the MTE/DPE elements. The Inr element is associated with the TAF1 HMG domain. TBP binds the upstream TATA element (PDB ID 7EGJ)[16].
B-C. TFIID lobe A is highly mobile. In panel B, lobe A is associated with TBP at the TATA site (PDB ID 7EGD) [16]. In panel C, lobe A has rotated and lies next to lobe B/C (PDB ID 7EGJ) [16]. The position of lobe A as seen in panel B is shown as a lime green surface.