Figure 1.

Sequence analysis of characterized SIPs. Multiple sequence alignment of BauF compared to the subgroup I SIPs FscN from Thermobifida fusca (NCBI: WP_011292284), SpSIP from Shewanella putrefaciens (NCBI: ABP73812), and SfSIP from Shewanella frigidimarina (NCBI: WP_011637846) and the subgroup II SIP YqjH from Escherichia coli (NCBI: WP_001066494). Residues shown in orange are involved in FAD binding. Residues depicted in green are the proposed ferric-siderophore binding pockets. The server T-Coffee was used for alignment and visualized with Jalview.⁵²