Fig. 2: Structures and locations of subunits PsaL, PsaJ, PsaD, PsaI, PsaM, PsaE, PsaR and previously unidentified subunits PsaT and PsaU and their interactions with PsaA and PsaB.
From: Architecture of symbiotic dinoflagellate photosystem I–light-harvesting supercomplex in Symbiodinium
The structures of the extended termini of PsaL/PsaJ (a), PsaD (b), PsaI (c), and PsaM (d). Interactions between the extended termini of PsaJ and PsaL (oval) are indicated by red arrow. The boxed areas show the changes of the loop structures of PsaA or PsaB indicated by arrows, facilitating the binding of the extended termini of these subunits. The N-terminus and C-terminus are labeled. The PsaA and PsaB of red algae (PDB: 7Y5E), cryptophyte (PDB: 7Y7B) and diatom (PDB: 6LY5) are colored gray. e The structure of the extended terminus of PsaR. f Comparation of the structures and locations of PsaT of Symbiodinium and PsaS of diatom. g The structures and location of PsaU. The boxed areas show the changes of the loop structures of PsaA indicated by arrows, facilitating the binding of PsaU. The PsaA of red algae, cryptophyte and diatom are colored gray.
