Sharma S. Isolation of a sequence-specific RNA binding protein, polypyrimidine tract binding protein, using RNA affinity chromatography.
Methods Mol Biol 2008;
488:1-8. [PMID:
18982280 DOI:
10.1007/978-1-60327-475-3_1]
[Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
Abstract
Many important cellular processes are mediated by sequence-specific RNA binding proteins, and it is often necessary to purify these proteins. When the RNA binding site is known, it is convenient to use this RNA as a matrix for affinity purification. The intronic splicing silencer (ISS) element present upstream of the N1 exon of the c-src pre-mRNA is a high-affinity binding site for the polypyrimidine tract binding protein (PTB). Using a 5'-biotinylated ISS RNA and PTB as an example, I describe a one-step method for affinity chromatography of RNA binding proteins from nuclear extracts.
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