Component of the SCF(sconB) E3 ubiquitin ligase complex involved in the regulation of sulfur metabolite repression, probably by mediating the inactivation or degradation of the metR transcription factor. Protein modification; protein ubiquitination. Component of the SCF(sconB) E3 ubiquitin ligase complex. Belongs to the WD repeat MET30/SCONB/SCON-2 family.