This is the N terminal helix-turn-helix domain of Transposase_2 Pfam:PF01385.

1: Characterization of an insertion sequence (IS891) of novel structure from the cyanobacterium Anabaena sp. strain M-131. Bancroft I, Wolk CP; J Bacteriol 1989;171:5949-5954. PMID:2553665

2: IS1136, an insertion element in the erythromycin gene cluster of Saccharopolyspora erythraea. Donadio S, Staver MJ; Gene 1993;126:147-151. PMID:8386127

3: A novel insertion sequence (IS)-like element of the thermophilic bacterium PS3 promotes expression of the alanine carrier protein-encoding gene. Murai N, Kamata H, Nagashima Y, Yagisawa H, Hirata H; gene 1995;163:103-107. PMID:7557457