9.B.102.1.12
YeeE/YedE protein with 9 TMSs and a C-terminal SirA/YedF/YeeD/YvrY domain of about 100 aas. The hydrophilic SirA α/β sandwich domain has been suggested to be involved in surface attachement and biofilm formation in enteric bacteria (Teplitski et al. 2006; Salazar et al. 2013). However, SirA/TusA/YhhP proteins bind FMN, catalyze sulfur transfer, and are important for sulfur oxidation, tRNA thiomodification and molybdenum cofactor biosynthesis (Dahl et al. 2013; Lee et al. 2013; Higgins et al. 2015)  Homologues have been shown to bind sulfur via a cysteyl residue, and growth on sullfide in sufur oxidation bacteria requires such a homologue (Stockdreher et al. 2014). Genes encoding homologues of YeeD are often found sandwiched in between the two genes encoding half sized YeeE homologues of 4 or 5 TMSs.