This protein contains an ATP/GTP binding P-loop motif. It is found associated with IS21 family insertion sequences [1]. The function of this protein is unknown, but it may perform a transposase function [2].

1: Characterization and sequence of a novel insertion sequence, IS1162, from Pseudomonas fluorescens. Solinas F, Marconi AM, Ruzzi M, Zennaro E; Gene 1995;155:77-82. PMID:7698671

2: Characterization of IS1474, an insertion sequence of the IS21 family isolated from Pseudomonas alcaligenes NCIB 9867. Yeo CC, Poh CL; FEMS Microbiol Lett 1997;149:257-263. PMID:9141667