The bacterial homolog of the SRP54 protein, containing a GTPase involved in cotranslational membrane targeting.
Its signal-recognition and GTPase functions connect a nascent hydrophobic segment with the bacterial SRP receptor FtsY. The pathway directs selected translating ribosomes toward the membrane before the complete protein has been synthesized. [ref]
Molecular Biology of the Cell, 4th edition by Bruce Alberts and others. Chapters 3, 6 and 15, protein function, translation and cell signalling
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