This protein is found in insertion sequences related to IS66. The function of these proteins is uncertain, but they are probably essential for transposition [2].

1: The Sinorhizobium meliloti insertion sequence (IS) element ISRm14 is related to a previously unrecognized IS element located adjacent to the Escherichia coli locus of enterocyte effacement (LEE) pathogenicity island. Schneiker S, Kosier B, Puhler A, Selbitschka W; Curr Microbiol 1999;39:274-281. PMID:10489437

2: Structural and functional characterization of IS679 and IS66-family elements. Han CG, Shiga Y, Tobe T, Sasakawa C, Ohtsubo E; J Bacteriol 2001;183:4296-4304. PMID:11418571