Fig. 4. A current model of the arrangement of subunits within the
TuRC postulates that 6-7
TuSC subcomplexes are held together by the other Grip proteins, which together form the cap subunits. Dgp71WD, which is the only known
TuRC subunits that lacks grip motifs (see below), is not required for the assembly of the
TuRC, and might be attached peripherally.