The regulation mechanism of protein biosynthesis on ribosome in the hibernation stage

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To understand the regulation mechanism of protein biosysnthesis under the starvation stress, structural analysis of 100S ribosomes was carried out by cryo-EM. In the case of E. coli, 30S subunit inserted to the entrance for mRNA. On the other hand, in the case of Staphylococcus Aureus, the exit site for mRNA was covered each 30S. And we confirmed the binding mode of Erviniawhich has E. coli type HPF and Lactobacilluswhich has Staphylococcustype HPF by cryoEM. So we demonstrated that two types of HPF produces two different types of binding mode of 100S ribosome.