Abstract
A gene encoding a DNA invertase-like enzyme was identified adjacent to the PaeR7I restriction-modification system (R-M), and was named paeR7IN (N for iNvertase). Sequence analysis revealed that this gene has the same polarity as the PaeR7IRM operon, and would encode a polypeptide of 21 506 Da. An amino-acid sequence similarity of 45–49% was found between the deduced protein product and various DNA invertases.
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