Abstract
Abstract Background Termination of translation in eukaryotes requires two release factors, eRF1, which recognizes all three nonsense codons and facilitates release of the nascent polypeptide chain, and eRF3 stimulating translation termination in a GTP-depended manner. eRF3 from different organisms possess a highly conservative C region (eRF3C), which is responsible for the function in translation termination, and almost always contain the N-terminal extension, which is inessential and vary both in structure and length. In the yeast Saccharomyces cerevisiae the N-terminal region of eRF3 is responsible for conversion of this protein into the aggregated and functionally inactive prion form. Results Here, we examined functional importance of the N-terminal region of a non-prion form of yeast eRF3. The screen for mutations which are lethal in combination with the SUP35-C allele encoding eRF3C revealed the sup45 mutations which alter the N-terminal domain of eRF1 and increase nonsense codon readthrough. However, further analysis showed that synthetic lethality was not caused by the increased levels of nonsense codon readthrough. Dominant mutations in SUP35-C were obtained and characterized, which remove its synthetic lethality with the identified sup45 mutations, thus indicating that synthetic lethality was not due to a disruption of interaction with proteins that bind to this eRF3 region. Conclusion These and other data demonstrate that the N-terminal region of eRF3 is involved both in modulation of the efficiency of translation termination and functioning of the eRF1/eRF3 complex outside of translation termination.
Bibliography
Urakov, V. N., Valouev, I. A., Kochneva-Pervukhova, N. V., Packeiser, A. N., Vishnevsky, A. Y., Glebov, O. O., Smirnov, V. N., & Ter-Avanesyan, M. D. (2006). N-terminal region of Saccharomyces cerevisiae eRF3 is essential for the functioning of the eRF1/eRF3 complex beyond translation termination. BMC Molecular Biology, 7(1).
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Dates
Type | When |
---|---|
Created | 18 years, 10 months ago (Oct. 11, 2006, 2:28 p.m.) |
Deposited | 4 years ago (Aug. 31, 2021, 11:06 p.m.) |
Indexed | 1 year, 2 months ago (June 13, 2024, 3:55 p.m.) |
Issued | 18 years, 10 months ago (Oct. 11, 2006) |
Published | 18 years, 10 months ago (Oct. 11, 2006) |
Published Online | 18 years, 10 months ago (Oct. 11, 2006) |
Published Print | 18 years, 9 months ago (Dec. 1, 2006) |
@article{Urakov_2006, title={N-terminal region of Saccharomyces cerevisiae eRF3 is essential for the functioning of the eRF1/eRF3 complex beyond translation termination}, volume={7}, ISSN={1471-2199}, url={http://dx.doi.org/10.1186/1471-2199-7-34}, DOI={10.1186/1471-2199-7-34}, number={1}, journal={BMC Molecular Biology}, publisher={Springer Science and Business Media LLC}, author={Urakov, Valery N and Valouev, Igor A and Kochneva-Pervukhova, Natalia V and Packeiser, Anna N and Vishnevsky, Alexander Yu and Glebov, Oleg O and Smirnov, Vladimir N and Ter-Avanesyan, Michael D}, year={2006}, month=oct }