It is also known as complement control protein (CCP) modules or short consensus repeats (SCR).
The name derives from the visual similarity of the domain to nigiri sushi when the primary structure is drawn showing the loops created by the disulfide bonds.
[1] Sushi domains exist in a wide variety of complement and adhesion proteins.
The structure is known for this domain; it is based on a beta-sandwich arrangement – one face made up of three β-strands hydrogen-bonded to form a triple-stranded region at its centre, and the other face formed from two separate β-strands.
[3] Complement decay-accelerating factor (Antigen CD55) belongs to the Cromer blood group system and is associated with Cr(a), Dr(a), Es(a), Tc(a/b/c), Wd(a), WES(a/b), IFC and UMC antigens.