Abstract
Translation of the genetic information into proteins, performed by the ribosome, is a key cellular process in all organisms. Translation usually proceeds smoothly, but, unfortunately, undesirable events can lead to stalling of translating ribosomes. To rescue these faulty arrested ribosomes, bacterial cells possess three well-characterized quality control systems, tmRNA, ArfA, and ArfB. Recently, an additional ribosome rescue mechanism has been discovered in Bacillus subtilis. In contrast to the “canonical” systems targeting the 70S bacterial ribosome, this latter mechanism operates by first splitting the ribosome into the small (30S) and large (50S) subunits to then clearing the resultant jammed large subunit from the incomplete nascent polypeptide. Here, I will discuss the recent microbiological, biochemical, and structural data regarding functioning of this novel rescue system.
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Abbreviations
- CAT tail:
-
Carboxy-terminal Alanine and Threonine tail
- RQC:
-
Ribosome-associated Quality Control
- tmRNA:
-
transfer-messenger RNA
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Acknowledgments
I want to express my deepest gratitude to my teacher Dr. Alexander Spirin and members of the Institute of Protein Research in Pushchino, where I gained priceless experience in the fields of protein biosynthesis and ribosomology. I am grateful to Alexander Richardson, Dr. Yury Polikanov, Dr. Nora Vázquez-Laslop, and Dr. Alexander Mankin for critical reading and fruitful discussion of the review.
Funding
This work was supported by the NIH grant R21-AI137584.
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Svetlov, M.S. Ribosome-Associated Quality Control in Bacteria. Biochemistry Moscow 86, 942–951 (2021). https://doi.org/10.1134/S0006297921080058
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DOI: https://doi.org/10.1134/S0006297921080058