Molecular insights into the enzymatic diversity of flavin-trafficking protein (Ftp; formerly ApbE) in flavoprotein biogenesis in the bacterial periplasm.

The identification of K207 as a residue critical for flavinylation is highly significant; despite previously published extensive mutagenesis of Ftp_Tp, the only residues identified as critical for FMN transferase activity were conserved residues that ligate the bound Mg 2+ ions in the enzyme (Deka et al. 2015 ).

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