Yeast translation elongation factor eEF3 promotes late stages of tRNA translocation
نویسندگان
چکیده
منابع مشابه
Purification and crystallization of the yeast translation elongation factor eEF3.
A Saccharomyces cerevisiae strain expressing full-length histidine-tagged translation elongation factor 3 (eEF3) as the only form of the protein facilitated purification of the factor for both structural and functional studies. Additionally, an identical full-length form has been successfully expressed in Escherichia coli and a C-terminally truncated form of histidine-tagged eEF3 has been succe...
متن کاملPossible steps of complete disassembly of post-termination complex by yeast eEF3 deduced from inhibition by translocation inhibitors
Ribosomes, after one round of translation, must be recycled so that the next round of translation can occur. Complete disassembly of post-termination ribosomal complex (PoTC) in yeast for the recycling consists of three reactions: release of tRNA, release of mRNA and splitting of ribosomes, catalyzed by eukaryotic elongation factor 3 (eEF3) and ATP. Here, we show that translocation inhibitors c...
متن کاملRibosome recycling step in yeast cytoplasmic protein synthesis is catalyzed by eEF3 and ATP.
After each round of protein biosynthesis, the posttermination complex (PoTC) consisting of a ribosome, mRNA, and tRNA must be disassembled into its components for a new round of translation. Here, we show that a Saccharomyces cerevisiae model PoTC was disassembled by ATP and eukaryotic elongation factor 3 (eEF3). GTP or ITP functioned with less efficiency and adenosine 5gamma'-(beta,gamma-imido...
متن کاملActivation of GTP hydrolysis in mRNA-tRNA translocation by elongation factor G
During protein synthesis, elongation of the polypeptide chain by each amino acid is followed by a translocation step in which mRNA and transfer RNA (tRNA) are advanced by one codon. This crucial step is catalyzed by elongation factor G (EF-G), a guanosine triphosphatase (GTPase), and accompanied by a rotation between the two ribosomal subunits. A mutant of EF-G, H91A, renders the factor impaire...
متن کاملConformational Changes of Elongation Factor G on the Ribosome during tRNA Translocation
The universally conserved GTPase elongation factor G (EF-G) catalyzes the translocation of tRNA and mRNA on the ribosome after peptide bond formation. Despite numerous studies suggesting that EF-G undergoes extensive conformational rearrangements during translocation, high-resolution structures exist for essentially only one conformation of EF-G in complex with the ribosome. Here, we report fou...
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ژورنال
عنوان ژورنال: The EMBO Journal
سال: 2021
ISSN: 0261-4189,1460-2075
DOI: 10.15252/embj.2020106449