This is the C-terminal domain of unknown function found in actinomycetes such as M. tuberculosis Rv2175c. Rv2175c has a DNA binding activity and possesses a winged helix-turn-helix fold, furthermore it is identified as a substrate of the PknL kinase [1].

1: The Mycobacterium tuberculosis Ser/Thr kinase substrate Rv2175c is a DNA-binding protein regulated by phosphorylation. Cohen-Gonsaud M, Barthe P, Canova MJ, Stagier-Simon C, Kremer L, Roumestand C, Molle V; J Biol Chem. 2009;284:19290-19300. PMID:19457863