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Rpn family recombination-promoting nuclease/putative transposase
This family of putative transposases includes the YhgA sequence from Escherichia coli (Swiss:P31667) and several prokaryotic homologues. (from Pfam)
The Rpn (Recombination-Promoting Nuclease) family includes YhgA, YadD, YfaD, and YfcI from Escherichia coli K-12, but also several paralogous families in Treponema denticola that are well enough conserved to suggest the proteins are transposases. Characterization of YhgA found magnesium-dependent, calcium-stimulated DNA endonuclease activity that promotes DNA incorporation, but stopped short of classifying YhgA as a transposase.
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