This family consists of several bacterial TniB NTP-binding proteins. TniB is a probable ATP-binding protein [1] which is involved in Tn5053 mercury resistance transposition [2]. This entry represents a P-loop domain.

1: Transposon Tn5090 of plasmid R751, which carries an integron, is related to Tn7, Mu, and the retroelements. Radstrom P, Skold O, Swedberg G, Flensburg J, Roy PH, Sundstrom L; J Bacteriol 1994;176:3257-3268. PMID:8195081

2: Four genes, two ends, and a res region are involved in transposition of Tn5053: a paradigm for a novel family of transposons carrying either a mer operon or an integron. Kholodii GY, Mindlin SZ, Bass IA, Yurieva OV, Minakhina SV, Nikiforov VG; Mol Microbiol 1995;17:1189-1200. PMID:8594337