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. Author manuscript; available in PMC: 2021 Mar 1.
Published in final edited form as: New Phytol. 2019 Nov 2;225(6):2283–2300. doi: 10.1111/nph.16240

Figure 5. Diverse domain architectures in knotted phytochromes.

Figure 5.

Jellybean domain diagrams are shown for diverse prokaryotic and eukaryotic phytochromes that use the canonical knotted PCM (Duanmu et al., 2014; Li et al., 2015). Bilin-binding GAF domains are red, the tongue region of the PHY domain is pink, bilin chromophores are shown as blue polygons, and chromophore-binding PYP domains are yellow. REC domains that are present in only some cases are dashed, as in PHYX1. Domain names: GAF, cGMP phosphodiesterase/Adenylate cyclase/FhlA; PAS, Per/ARNT/Sim; PHY, phytochrome-specific; (H)kinase, histidine kinase bidomain, with the presence of the His indicated by H; REC, response regulator receiver; RING, really interesting new gene; euk kinase, eukaryotic protein kinase; cyclase, eukaryotic adenylate/guanylate cyclase; GGDEF, diguanylate cyclase; PYP, photoactive yellow protein; bHLH, basic helix-loop-helix; LOV, PAS domain belonging to the light/oxygen/voltage lineage. Two-Cys phytochromes from cyanobacteria and glaucophytes are not indicated.