Fig. 5: PsaV and protein extensions collectively stabilize the split PsaA1/A2, FCPs, and the PsaSOD1/2 heterodimer. | Nature Communications

Fig. 5: PsaV and protein extensions collectively stabilize the split PsaA1/A2, FCPs, and the PsaSOD1/2 heterodimer.

From: The cryo-EM structure of Photosystem I from Chromera velia with a bound superoxide dismutase heterodimer

Fig. 5

a Overall and close-up views showing interactions of PsaV with the PsaA1/A2 dimer, FCPb, FCPc, PsaL, and PsaB. b The PsaSOD1/2 platform, formed by stromal protein extensions of several canonical subunits in the PSI core, is highlighted in red. Interacting residues are depicted as spheres centered on Cα atoms, colored according to their respective subunits (< 4 Å distance cut-off for sidechain-to-sidechain interactions). c Protein extensions of FCPs stabilize their attachments, with further support from PsaV. Interactions are shown the same way as in (b).

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