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Model of group A Streptococcus (GAS) Mga. A: Individual domains of Mga are color coded: N-terminal DNA-binding domain with the helix-turn-helix motifs in green, PRD-1 in yellow, PRD-2 in blue, and C-terminal oligomerization domain in orange. The N- and C-terminal ends are labeled. The side chains of H201, H207, and H273 are shown as spheres. B: Magnified view of amino acid H201 and its relative proximity to the phosphorylatable H207 and H273 residues.
