MEDS is prototyped by DcmR and is likely to function with the PocR domain in certain organisms in sensing hydrocarbon derivatives [1][2] The MEDS domain occurs fused to Histidine Kinase and as stand-alone version [2]. Sequence analysis shows that it is a catalytically inactive version of the P-loop NTPase domain of the RecA superfamily.

1: Identification of dcmR, the regulatory gene governing expression of dichloromethane dehalogenase in Methylobacterium sp. strain DM4. La Roche SD, Leisinger T; J Bacteriol. 1991;173:6714-6721. PMID:1938878

2: MEDS and PocR are novel domains with a predicted role in sensing simple hydrocarbon derivatives in prokaryotic signal transduction systems. Anantharaman V, Aravind L; Bioinformatics. 2005;21:2805-2811. PMID:15814558