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Small-Angle X-Ray Studies on the Structure of 16-S Ribosomal RNA and of a Complex of Ribosomal Protein S4 and 16-S Ribosomal RNA from Escherichia coli
| Content Provider | Scilit |
|---|---|
| Author | Folkhard, Waltraud Pilz, Ingrid Kratky, Otto. Garrett, Roger Stöffler, Georg |
| Copyright Year | 1975 |
| Description | Journal: Journal of Biological Inorganic Chemistry 16-S ribosomal RNA and a complex of ribosomal protein S4 and 16-S rRNA were studied in solution by small-angle X-ray scattering. Concentration series of the 16-S rRNA and the S4 - 16-S-rRNA complex were measured in 37.5 mM Tris-HCl buffer pH 7.4 at 5 degrees C. The following data were determined. The radii of gyration for the 16-S rRNA and S4 - 16-S-rRNA complex were R = 17.6 +/- 0.6 nm, respectively. The two respective values of the radii of gyration of the cross-section were Rq,1 = 8.42 +/- 0.1 nm and 8.33 +/- 0.3 nm, and Rq,2 = 0.988 +/- 0.03 nm and 0.996 +/- 0.03 nm. The largest diameters of the 16-S RNA and S4 - 16-S-RNA complex were L = 61.8 +/- 1 nm and 60.0 +/- 1 nm, respectively. Volumes of V = 1570 +/- 60 nm3 were found for both particles. In the Tris buffer used, no significant differences were found between the scattering curves of 16-S rRNA and the complex is a flat elliptical cylinder with the following dimensions: large axis 61.7 nm, small axis 35.4 nm and height 2 nm. The theoretical scattering curve fits the experimental one as long as the shape of the measured curve is due only to the overall shape of the particle. A model equivalent over the whole measured angular range is one built up from a large number of spheres that simulate the known substructure of the RNA. The outer dimensions of this model correspond to those of the flat elliptical cylinder. |
| Related Links | http://onlinelibrary.wiley.com/doi/10.1111/j.1432-1033.1975.tb02425.x/pdf |
| Ending Page | 71 |
| Page Count | 9 |
| Starting Page | 63 |
| ISSN | 09498257 |
| e-ISSN | 14321327 |
| DOI | 10.1111/j.1432-1033.1975.tb02425.x |
| Journal | Journal of Biological Inorganic Chemistry |
| Issue Number | 1 |
| Volume Number | 59 |
| Language | English |
| Publisher | Wiley-Blackwell |
| Publisher Date | 1975-11-01 |
| Access Restriction | Open |
| Subject Keyword | Journal: Journal of Biological Inorganic Chemistry Ribosomal Protein |
| Content Type | Text |
| Resource Type | Article |
| Subject | Biochemistry Inorganic Chemistry |
