Members of this family are proteins of unknown function, regularly found in a conserved gene neighborhood that also includes two uncharacterized radical SAM proteins. The protein family is named for a founding member from the Salmonella enterica model strain LT2, although the system is rare in the Proteobacteria and relativly common in Streptomyces and related taxa.
Lu S et al.(2020). "CDD/SPARCLE: the conserved domain database in 2020.",