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Title: U4 and U6 RNAs coexist in a single small nuclear ribonucleoprotein particle. Author: Hashimoto C, Steitz JA. Journal: Nucleic Acids Res; 1984 Apr 11; 12(7):3283-93. PubMed ID: 6201826. Abstract: U4 and U6 RNAs of mammalian cells possess extensive intermolecular sequence complementarity and hence have the potential to base pair. A U4/U6 RNA complex, detectable in nondenaturing polyacrylamide gels, is released when human small nuclear ribonucleoproteins (snRNPs) containing U1, U2, U4, U5, and U6 RNAs are dissociated with proteinase K in the presence of sodium dodecyl sulfate. The released RNA/RNA complex dissociates with increasing temperature, consistent with the existence of specific base-pairing between the two RNAs. Since U6 RNA is selectively released from intact snRNPs under the same conditions required to dissociate the U4/U6 RNA complex, the RNA-RNA interaction may be sufficient to maintain U4 and U6 RNAs in the same snRNP particle. The biological implications of these findings are discussed.[Abstract] [Full Text] [Related] [New Search]