Tags: Protein.
Mga is a DNA-binding protein that activates the expression of several important virulence genes in Streptococcus pyogenes (group A Streptococcus GAS) in response to changing environmental conditions. The family also contains VirR like proteins which match only at the C-terminus.Mga is a wide-reaching regulator affecting gene expression in over 10% of the S. pyrogenes genome.