This domain with a strongly conserved glutamate at the N-terminus and a histidine at the C-terminus [1], is found in a SWI2/SNF2 four gene operon [1]. Its strict-neighbourhood association with SWI2/SNF2 ATPase strongly suggests a function in conjunction with it [1]. The other genes in the operon are a OmpA protein and a TM protein [1]. This has a DNA related function along with the TerY-P triad [1].

1: Ter-dependent stress response systems: novel pathways related to metal sensing, production of a nucleoside-like metabolite, and DNA-processing. Anantharaman V, Iyer LM, Aravind L; Mol Biosyst. 2012;8:3142-3165. PMID:23044854