RING finger family domain found sporadically in bacteria. The finger is fused to an N-terminal alpha-helical domain, ROT/Trove-like repeats and a C-terminal TerD domain [1]. The architecture suggests a possible role in an RNA-processing complex [1].

1: Functional diversification of the RING finger and other binuclear treble clef domains in prokaryotes and the early evolution of the ubiquitin system. Burroughs AM, Iyer LM, Aravind L; Mol Biosyst. 2011;7:2261-2277. PMID:21547297