Expression and Purification of tRNA/ pre-miRNA-Based Recombinant Noncoding RNAs

Mei Juan Tu, Halley K. Wright, Neelu Batra, Ai Ming Yu

Research output: Chapter in Book/Report/Conference proceedingChapter


Research on RNA function and therapeutic potential is dominated by the use of chemoengineered RNA mimics. Recent efforts have led to the establishment of novel technologies for the production of recombinant or bioengineered RNA molecules, which should better recapitulate the structures, functions and safety profiles of natural RNAs because both are produced and folded in living cells. Herein, we describe a robust approach for reproducible fermentation production of bioengineered RNA agents (BERAs) carrying warhead miRNAs, siRNAs, aptamers, or other forms of small RNAs, based upon an optimal hybrid tRNA/pre-miRNA carrier. Target BERA/sRNAs are readily purified by fast protein liquid chromatography (FPLC) to a high degree of homogeneity (>97%). This approach offers a consistent high-level expression (>30% of total bacterial RNAs) and large-scale production of ready-to-use BERAs (multiple to tens milligrams from 1 L bacterial culture).

Original languageEnglish (US)
Title of host publicationMethods in Molecular Biology
PublisherHumana Press Inc.
Number of pages17
StatePublished - 2021

Publication series

NameMethods in Molecular Biology
ISSN (Print)1064-3745
ISSN (Electronic)1940-6029


  • Bacteria
  • Bioengineering
  • Expression
  • Fast protein liquid chromatography (FPLC)
  • microRNA (miR)
  • Noncoding RNA (ncRNA)
  • Pre-miRNA
  • Purification
  • Small interfering RNA (siRNA)
  • tRNA

ASJC Scopus subject areas

  • Molecular Biology
  • Genetics


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