This domain is found in bacteria. This domain is about 360 amino acids in length. This domain is found associated with Pfam:PF00271, Pfam:PF00176. The function of this domain is not known, but structurally it forms an alpha-beta fold in nature with a central beta-sheet flanked by helices and loops, the beta-sheet being mainly antiparallel and flanked by four alpha helices, among which the two longer helices exhibit a coiled-coil arrangement.

1: Structure of RapA, a Swi2/Snf2 protein that recycles RNA polymerase during transcription. Shaw G, Gan J, Zhou YN, Zhi H, Subburaman P, Zhang R, Joachimiak A, Jin DJ, Ji X; Structure. 2008;16:1417-1427. PMID:18786404