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. 1992 Dec 1;89(23):11269–11273. doi: 10.1073/pnas.89.23.11269

Evidence for a base-pairing interaction between U6 small nuclear RNA and 5' splice site during the splicing reaction in yeast.

H Sawa 1, J Abelson 1
PMCID: PMC50531  PMID: 1333604

Abstract

U6 small nuclear RNA (snRNA) is an essential factor in mRNA splicing. On the basis of the high conservation of its sequence, it has been proposed that U6 snRNA may function catalytically during the splicing reaction. If this is the case, it is likely that U6 snRNA interacts with the splice sites in the spliceosome to catalyze the reaction. We have used UV crosslinking to analyze the interactions of U6 snRNA with the splicing substrates during the yeast splicing reaction. Crosslinked products in which the central region of U6 snRNA was joined to the 5' splice site region of mRNA precursor and lariat intermediate were identified. The crosslinking sites were precisely located in one of these products. The results suggest a possible base-pairing interaction between U6 snRNA and the 5' splice site of the mRNA precursor.

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Selected References

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