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© Research
Publication : Nucleic acids research

A cell-free extract from yeast cells for studying mRNA turnover

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Nucleic acids research - 25 May 1992

Vreken P, Buddelmeijer N, Raué HA

Link to Pubmed [PMID] – 1598208

Nucleic Acids Res. 1992 May;20(10):2503-10

We have isolated a cell-free extract from yeast cells that reproduces the differences observed in vivo in the rate of turnover of individual yeast mRNAs. Detailed analysis of the degradation of yeast phosphoglycerate kinase (PGK) mRNA in this system demonstrated that both natural and synthetically prepared PGK transcripts are degraded by the same pathway previously established by us in vivo, consisting of endonucleolytic cleavage at a number of 5′-GGUG-3′ sequence motifs within a short target region located close to the 3′-end of the coding sequence followed by 5′-3′ exonucleolytic removal of the resulting fragments. The extract, therefore, is suitable for studying the mechanistic details of mRNA turnover in yeast. As a first application of this system we have performed a limited mutational analysis of two of the GGUG motifs within the endonucleolytic target region of the PGK transcript. The results show that sequence changes in either motif abolish cleavage at the mutated site only, indicating the involvement of the residues in question in selection of the cleavage positions.

http://www.ncbi.nlm.nih.gov/pubmed/1598208