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. 2022 Feb 8;19:e190001. doi: 10.2142/biophysico.bppb-v19.0001

Figure 6 .

Figure 6 

(A) Active site structure of Helicobacter pylori NifS in the resting state [PDB ID: 5wt2]. (B) Active site structure of H. pylori NifS in an intermediate state of PLP-l-Cys external aldimine [PDB ID: 6kg0]. (C) Active site structure of Bacillus subtilis SufS in the resting state [PDB ID: 5zs9]. (D) Active site structure of B. subtilis SufS in an intermediate state of PLP-l-Cys external aldimine with Cys361-persulfide [PDB ID: 6kfz]. Dashed lines indicate key polar interactions for binding of the substrate l-cysteine into the active sites.