Signal recognition particle subunit SRP68

UniProtKB accession:  Q00004

Grouped By:  Matching UniProtKB accession

UniProtKB description:  Component of the signal recognition particle (SRP) complex, a ribonucleoprotein complex that mediates the cotranslational targeting of secretory and membrane proteins to the endoplasmic reticulum (ER) (PubMed:6413076, PubMed:6938958). The SRP complex interacts with the signal sequence in nascent secretory and membrane proteins and directs them to the membrane of the ER (PubMed:6413076, PubMed:6938958). The SRP complex targets the ribosome-nascent chain complex to the SRP receptor (SR), which is anchored in the ER, where SR compaction and GTPase rearrangement drive cotranslational protein translocation into the ER (By similarity). Binds the signal recognition particle RNA (7S RNA), SRP72 binds to this complex subsequently (PubMed:8388879). The SRP complex possibly participates in the elongation arrest function (By similarity).