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Atomic-scale structures of ribosome could help improve antibiotics
Date:5/19/2011

e inner-workings of the ribosome like never before. They reveal that the ribosome machine contains molecular-scale compression springs and torsion springs made of RNA. These molecular springs keep the ribosome's subunits tethered together even as they rotate with respect to each other.

"This is first time we've seen the ribosome at the endpoint of this motion at this resolution," says Cate. "And the question is, when you have these big motions, why doesn't the ribosome fall apart. We found that the ribosome has RNA springs that adjust their shape and allow it to stay together during these large-scale motions."

The structures also provide a new way to compete in the arms race between antibiotics and the microbes they're designed to knock out.

"The ribosome is one of the major targets of antibiotics, and we've identified elements of its rotation that can be targeted by new or modified antibiotics," says Cate. "This kind of precision could be especially powerful in the age of personalized medicine. Scientists could figure out at a genetic level why someone isn't responding to an antibiotic, and then possibly switch to a more effective antibiotic that better targets the microbe that's causing their disease."


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Contact: Dan Krotz
dakrotz@lbl.gov
510-486-4019
DOE/Lawrence Berkeley National Laboratory
Source:Eurekalert  

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