uncharacterized family distantly related to the N-terminal domain of the ParB/Srx superfamily
Uncharacterized proteins distantly related to the N-terminal domain of the ParB superfamily, primarily involved in bacterial and plasmid parABS-related partitioning systems. A small minority of proteins in this family include a C-terminal inorganic pyrophosphatase domain. Also within the ParB superfamily is sulfiredoxin (Srx), which is a reactivator of oxidatively inactivated 2-cys peroxiredoxins. Other families includes a putative regulator in the biosynthetic gene cluster and a family containing a Pyrococcus furiosus nuclease and putative transcriptional regulators SbnI (Staphylococcus aureus siderophore biosynthetic gene cluster ) and EdeB (Brevibacillus brevis antimicrobial peptide edeine biosynthetic cluster). Nuclease activity has also been reported in Arabidopsis Srx.