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Protein Expr Purif. 2012 Mar;82(1):26-31. doi: 10.1016/j.pep.2011.10.010. Epub 2011 Nov 10.

RNA secondary structure and in vitro translation efficiency.

Author information

1
Department of Biophysics and Physical Biochemistry, University of Regensburg, Postfach, D-93040 Regensburg, Federal Republic of Germany.

Abstract

Cell-free protein synthesis is a promising technology featuring many advantages compared to in vivo expression techniques. However, most proteins are still synthesized in vivo due to relatively low protein yields commonly achieved in vitro, especially in the batch mode of reaction. In Escherichia coli S30 extract-based cell-free systems protein yields are supposed to be partially limited by a secondary structure formation of the mRNA. In this study we checked promising members of various classes of RNA chaperones and several different RNA helicases on their ability to enhance in vitro translation. The data clearly show that the addition of none of these factors provides a general solution to the problem. However, protein yields can be increased in presence of a microRNA hybridizing with the 5' untranslated region of mRNAs, possibly by inducing structural changes improving accessibility of the Shine Dalgarno sequence for the ribosomes.

PMID:
22100525
DOI:
10.1016/j.pep.2011.10.010
[Indexed for MEDLINE]

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