SRP68 is a family that is part of the SRP or signal recognition particle complex. This complex, consisting of six proteins and a 7SL-RNA is necessary for guiding the emerging proteins designed for the membrane towards the translocation pore. SRP68 forms a stable heterodimer with SRP72, a protein with a TPR repeat. Specific RNA-binding of SRP68 is mediated by the N-terminal domain of approximately 200 residues of this family [1].

1: SRP RNA remodeling by SRP68 explains its role in protein translocation. Grotwinkel JT, Wild K, Segnitz B, Sinning I; Science. 2014;344:101-104. PMID:24700861