Nucleic Acids Research, 2000, Vol. 28, No. 18 e83
© 2000 Oxford University Press
Psoralen photo-crosslinked mRNApuromycin conjugates: a novel template for the rapid and facile preparation of mRNAprotein fusions
Phylos Inc., 128 Spring Street, Lexington, MA 02421, USA
We describe the synthesis of a novel type of mRNA template and its use in the preparation of mRNAprotein fusions. A light-induced psoralen crosslinking reaction was used to attach a puromycin-containing oligonucleotide to the 3'-end of an mRNA template. The photo-crosslinked template was found to undergo efficient mRNAprotein fusion formation in rabbit reticulocyte lysate. Fusion formation was subsequently tested with templates carrying puromycin linkers of different length and chemical composition. Short linkers with multiple triethyleneglycol phosphate building blocks allowed the most efficient fusion formation under a wide range of salt conditions. The present method simplifies the preparation of mRNAprotein fusions and thus significantly accelerates the in vitro protein evolution procedure which involves repetitive cycles of fusion production and selection.
* To whom correspondence should be addressed. Tel: +1 781 862 6400; Fax: +1 781 402 8800; Email: plohse@phylos.com
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