Involvement of U1 Small Nuclear Ribonucleoproteins (snRNP) in 5′ Splice Site-U1 snRNP Interaction

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Structured PICO

Population

Purified U1 snRNP and a short RNA oligonucleotide comprising the 5' splice site (5'-SS) consensus sequence of pre-mRNAs

Intervention

Oligonucleotide-directed cleavage of the U1 small nuclear RNA (snRNA) 5' end sequence with RNase H

Outcome

Association and dissociation kinetics of the 5' splice site-U1 snRNP interaction

U1-specific snRNP proteins are critical for 5' splice site recognition, while base pairing ensures the stability of the interaction.

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Highlights distinct roles for U1 proteins versus base pairing in splice-site binding; leaves open validation in cellular splicing models.

Rossi et al. (1996) studied this question.

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