Fig. 3: The structure of DrBphP-DrRR in Pfr.
From: Structural mechanism of signal transduction in a phytochrome histidine kinase
a The reconstructed electron density of Pfr full-length is shown with the structural model, which was refined up to residue Ala521 based on the cryo-EM map of the photosensory core module in Pfr (Pfr PSM). Patches of electron density were assigned to the CA and REC domains (see Supplementary Fig. 5b). b The tongue is in α-helical form characteristic of Pfr-state phytochrome structures. c The density of the BV chromophore supports a 15E conformation (compare to Supplementary Fig. 5d). The densities of the PHY tongue and BV are extracted from the cryo-EM map with the local refinement of the PSM and neck in Pfr (Pfr PSM, see Supplementary Fig. 4).
