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. 2022 Jun 17;7(26):22601–22612. doi: 10.1021/acsomega.2c01924

Figure 3.

Figure 3

AfSQS and HsSQS structures. (a) AfSQS (PDB ID code 7WGH, green) and HsSQS (PDB ID code 1EZF, cyan). (b) HsSQS (PDB ID code 3VJA) displayed using a B-factor putty view. The red helix X is generally not seen in other SQS structures. (c) Superposition of the AfSQS/FSPP structure (green; PDB ID code 7WGH) with that of the HsSQS/2FSPP/3Mg2+ structure (cyan; PDB ID code 3WEG) showing similar ligand and catalytic Asp/Glu residue conformations. The magenta spheres are the three Mg2+ seen in the HsSQS structure. S1 = allylic binding site; S2 = homoallylic binding site.