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Figure 10 | BMC Structural Biology

Figure 10

From: Prediction of transmembrane helix orientation in polytopic membrane proteins

Figure 10

Conservation of residues and packing interactions of PetM subunit in cytochrome b 6 f. (A) TM helices PetN and PetM are tightly packed around the overrepresented sequential motifs SS4 and GG4 in 1Q90. Small residues such as Gly and Ser promote tight packing and form weak hydrogen bonds [40] at helix-helix interfaces. (B) TM helices PetN and PetM do not pack tightly in 1VF5 structure. (C) Conserved GG4 motif on the PetM helix packs against Tyr26 and Tyr29 residues on the PetG helix in 1VF5. (D) Sequence logo of PetM subunt (17 sequences, pairwise sequence identity 22%–81%).

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