Fig. 3.

Distribution of lipid-binding sites around the dimerization interface of PsPSII. A Top view of the PsPSII core dimer from the stromal side. The lipid molecules are highlighted as colored sphere models. The peripheral antenna complexes (LHCII, CP29, CP26 and CP24) are omitted for clarity. The region around Cluster-1 lipids is labeled by the dashed elliptical ring. B Zoom-in view of the Cluster-1 lipid molecules from the stromal side. C The binding sites of three SQDG molecules at Cluster 1 region viewed from the stromal side. D The binding sites of three PG molecules at Cluster 1 region viewed from the stromal side. E The binding sites of a MGDG molecule at Cluster 1 region viewed from luminal side. F The binding sites of one MGDG and one DGDG molecule around CP47, D1, PsbO and PsbI subunits viewed from luminal side. The gray dash lines indicate the hydrogen bonds and ionic interactions formed between lipid head groups and nearby amino acid residues. DGD, LHG, LMG and SQD are three-letter codes for DGDG, PG, MGDG and SQDG, respectively