title: Structural organization of ribosomal RNAs from Novikoff hepatoma. II. Characterization of possible binding sites of 5 S rRNA and 5.8 S rRNA to 28 S rRNA.
abstract: Interrelationships among 5 S, 5.8 S, and 28 S rRNA were probed by methods employed in the accompanying report (Choi, Y. C. (1985) J. Biol. Chem. 260, 12769-12772). Two complexes were isolated from 20 S ribonucleoprotein (RNP) fraction and 60 S subunit. The 20 S RNP fraction was found to contain the 3'-340 nucleotide fragment (domain VII) in association with 5 S rRNA. The 60 S subunit contained a stable complex consisting of the 5'-upstream portion (4220-4462, domain VI and VII), the 3'-downstream portion (4463-4802, domain VII) of 3'-583 nucleotides fragment, and 5.8 S rRNA. By computer analysis and hybridization, the 5'-upstream portion was found to contain the 5.8 S rRNA contact site. By affinity chromatography, the 3'-downstream portion was found to contain the 5 S rRNA association site. Furthermore, by comparison with the secondary structure of 28 S rRNA proposed by Hadjiolov et al. (Hadjiolov, A. A., Georgiev, O. I., Nosikov, V. V., and Yavachev, L. P. (1984) Nucleic Acids Res. 12, 3677-3693), it was found that domain VII is capable of binding 5.8 S rRNA and 5 S rRNA juxtaposed to each other. Accordingly, a model was proposed to indicate that a possible contact site for 5.8 S rRNA is within the region surrounding the alpha-sarcin site (4333-4350) and is a possible association site of 5 S rRNA within the 3'-downstream portion (4463-4802) of the 3'-583 nucleotide fragment (4220-4802).
mesh_terms: D000818:Animals; D001483:Base Sequence; D001665:Binding Sites; D005591:Chemical Fractionation; D003201:Computers; D004492:Edetic Acid / Q000494:pharmacology; D004591:Electrophoresis, Polyacrylamide Gel; D008114:Liver Neoplasms, Experimental / Q000032:analysis*; D009690:Nucleic Acid Conformation; D009693:Nucleic Acid Hybridization; D009843:Oligoribonucleotides / Q000378:metabolism; D011132:Polyribosomes / Q000032:analysis; D012335:RNA, Ribosomal / Q000378:metabolism*; D051381:Rats; D006163:Ribonuclease T1 / Q000378:metabolism; D012259:Ribonuclease, Pancreatic / Q000378:metabolism; D012261:Ribonucleoproteins / Q000032:analysis
chemical_list: D009843:Oligoribonucleotides; D012335:RNA, Ribosomal; D012261:Ribonucleoproteins; D004492:Edetic Acid; D006163:Ribonuclease T1; D012259:Ribonuclease, Pancreatic