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N-terminal domain of transcriptional regulators similar to SbnI Siderophore staphylobactin biosynthesis protein SbnI of Staphylococcus aureus is a ParB/Spo0J like protein required for the expression of genes in the sbn operon, which is responsible for staphyloferrin B (SB) biosynthesis. SnbI forms dimers and binds DNA upstream of sdnD. SbnI binds heme, which inhibits DNA binding of SbnI, leading to a suppression of sbn operon expression.
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