Newly synthesized secretory and membrane proteins contain cleavable signal sequences at the N terminus that allow for cotranslational protein targeting by interaction with the signal recognition particle (SRP). New results now suggest that signal sequences enable the conserved SRP RNA to accelerate complex formation with the SRP receptor.
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Sinning, I., Wild, K. & Bange, G. Signal sequences get active. Nat Chem Biol 5, 146–147 (2009). https://doi.org/10.1038/nchembio0309-146
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DOI: https://doi.org/10.1038/nchembio0309-146