Japan-based researchers have, for the first time, directly visualized the intricate process of protein translocation across membranes using high-speed atomic force microscopy (HS-AFM). This long-sought-after observation had only been biochemically predicted until now.
Protein translocation is a crucial nano-scale process that enables proteins to traverse cellular membranes, ensuring they reach specific intracellular locations or are secreted outside the cell. This function is facilitated by specialized membrane protein complexes that act as channels. In bacteria, the SecYEG-SecA complex plays a vital role in this process. The SecYEG channel, coupled with the energy-driven activity of SecA, facilitates the movement of proteins across the cytoplasmic membrane, powered by adenosine triphosphate (ATP)—the…