Isolation of RNP granules

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The post-transcriptional operon provides a means of synexpression of mRNAs encoding interrelated proteins. The coordination of gene expression may be achieved by a trans-acting RNA-binding protein attaching to similar cis-elements in different, yet functionally clustered, mRNAs. The RNP granule can be regarded as a supramolecular assembly of RNA and protein, probably representing several overlapping post-transcriptional operons. The present protocol describes how RNP granules may be isolated by the transgenic expression of a 3X FLAG version of an RNA-binding protein under tetracycline control via the tetracycline receptor/operator complex. In this way, inclusion of an appropriate tetracycline concentration ensures expression of the tagged version at the endogenous level, and the 3X FLAG tag is a convenient "handle" for the subsequent immunoprecipitation by immobilized anti-FLAG antibody.
Original languageEnglish
Title of host publicationRNA : methods and protocols
EditorsHenrik Nielsen
Number of pages9
Publication date2011
ISBN (Print)978-1-58829-913-0
ISBN (Electronic)978-1-59745-248-9
Publication statusPublished - 2011
SeriesMethods in Molecular Biology

ID: 40966820