Ribosomes

Research reports on ribosomes from Charite University provide new insights

Published in Proteomics Weekly, November 10th, 2008

"EF4 (LepA) is an almost universally conserved translational GTPase in eubacteria. It seems to be essential under environmental stress conditions and has previously been shown to back-translocate the tRNAs on the ribosome, thereby reverting the canonical translocation reaction," researchers in Berlin, Germany report.

"In the current work, EF4 was directly visualized in the process of back-translocating tRNAs by single-particle cryo-EM. Using flexible fitting methods, we built a model of ribosome-bound EF4 based on the cryo-EM map and a recently published unbound EF4 X-ray structure. The cryo-EM map establishes EF4 as a noncanonical elongation factor that interacts not...

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Source: Proteomics Weekly (2008-11-10)

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