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) (By similarity). Binds directly to 7SL RNA (By similarity). Mediates binding of SRP54 to the SRP complex (By similarity). Component of a signal recognition particle complex that consists of a 7SL RNA molecule of 300 nucleotides and six protein subunits: srpa-72, srpa-68, SRP54, F37F2.2/SRP19, F25G6.8/SRP14 and ZK512.4/SRP9. Belongs to the SRP19 family.