Fig. 14
From: Circadian oscillator proteins across the kingdoms of life: structural aspects
Structure of the PsR domain of CiKA. a CiKA-PsR (yellow, PDB 2J48) superimposed on the Spo0F–Spo0B complex (blue and orange, PDB 1F51) depicting the structural difference in the HPK-PsR domain interaction interface in CiKA and bacterial Spo0F–Spo0B. b The complete phytochrome sensory module of Synechocystis 6803 Cph1 (PDB 2VEA). The tongue region is encircled. The N-terminal region is shown in yellow, the PAS domain in pink, the GAF domain in orange, and the PHY domain in green. The phycocyanobilin (PCB) chromophore is shown in blue stick representation