Cell surface-associated calcium-binding protein which plays an important role in adhesion and pathogenesis. Contributes to the resistance to killing by innate immune components in blood and thus attenuates bacterial clearance by interacting with host complement factor H/CFAH and modulating its activity. Inhibits also bacterial opsonization and killing by interacting with host complement regulator C4BPA and thus inhibiting classical complement pathway activation. SdrE Protein, S. aureus, Recombinant (His) is expressed in E. coli expression system with N-6xHis tag. The predicted molecular weight is 64.5 kDa and the accession number is Q932F7.