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bifunctional transcriptional regulator/O-phospho-L-serine synthase SbnI SbnI is a bifunctional protein involved in staphyloferrin B (staphylobactin) biosynthesis in Staphylococcus aureus and other members of the genus. It is a bifunctional protein. The N-terminal region is heme-binding, and loses the ability to bind DNA when heme is bound. Under low iron conditions, the biosynthesis operon for staphyloferrin B, a carboxylate-type siderophore, is derepressed. The C-terminal domain is a kinase that acts on free serine, producing O-phospho-L-serine, which is used as one of the precursors of staphyloferrin B. |
Jiyao W et al.(2023). "The conserved domain database in 2023.",