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. 1990 Dec 25;18(24):7373-9.
doi: 10.1093/nar/18.24.7373.

Sequence-specific affinity selection of mammalian splicing complexes

U Ryder  1 , B S Sproat, A I Lamond
Affiliations
Free PMC article

Sequence-specific affinity selection of mammalian splicing complexes

U Ryder et al. Nucleic Acids Res. .
Free PMC article

Abstract

Antisense oligonucleotides made of 2'-OMe RNA are shown to bind specifically and efficiently to targeted sites on pre-mRNA substrates, allowing affinity selection of splicing complexes using streptavidin/biotin chromatography. The position of probe binding to the pre-mRNA influences which type of splicing complex can be selected. The accessibility of pre-mRNA sequences to antisense probes changes during the course of the splicing reaction. U1, U2, U4, U5 and U6 snRNAs are all detected in affinity-selected mammalian splicing complexes. However, antisense oligonucleotides targeted to snRNAs can block the binding of specific snRNPs to pre-mRNA. Quantitative affinity selection analyses show that only a small fraction of snRNPs in a HeLa nuclear splicing extract participate in spliceosome formation.

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