This is the YqgF-like domain of the bacterial Tex protein, which is involved in transcriptional processes [1].

1: Crystal structure and RNA binding of the Tex protein from Pseudomonas aeruginosa. Johnson SJ, Close D, Robinson H, Vallet-Gely I, Dove SL, Hill CP; J Mol Biol. 2008;377:1460-1473. PMID:18321528