Spermidine deficiency increases +1 ribosomal frameshifting efficiency and inhibits Ty1 retrotransposition in Saccharomyces cerevisiae.
收藏PubMed Central1994-01-04 更新2026-05-16 收录
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https://pmc.ncbi.nlm.nih.gov/articles/PMC42908/
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资源简介：
Polyamines have been implicated in nucleic acid-related functions and in protein biosynthesis. RNA sequences that specifically direct ribosomes to shift reading frame in the -1 and +1 directions may be used to probe the mechanisms controlling translational fidelity. We examined the effects of spermidine on translational fidelity by an in vivo assay in which changes in beta-galactosidase activity are dependent on yeast retrovirus Ty +1 and yeast double-stranded RNA virus L-A -1 ribosomal frameshifting signals. In spe2 delta mutants of Saccharomyces cerevisiae, which cannot make spermidine as a result of a deletion in the SPE2 gene, there is a marked elevation in +1 but no change in -1 ribosomal frameshifting. The increase in +1 ribosomal frameshifting efficiency is accompanied by a striking decrease in Ty1 retrotransposition. IMAGES:
提供机构：
National Academy of Sciences
创建时间：
1994-01-04
