DsrE is a small soluble protein involved in intracellular sulfur reduction [1]. The family also includes YrkE proteins.

1: Sirohaem sulfite reductase and other proteins encoded by genes at the dsr locus of Chromatium vinosum are involved in the oxidation of intracellular sulfur. Pott AS, Dahl C; Microbiology 1998;144:1881-1894. PMID:9695921