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| Content Provider | PubMed Central |
|---|---|
| Author | Szymkowiak, C. Wagner, R. |
| Abstract | 70S ribosomes from E. coli were chemically cross-linked under conditions of in vitro protein biosynthesis. The ribosomal RNAs were extracted from reacted ribosomes and separated on sucrose gradients. The 5S RNA was shown to contain the ribosomal protein L25 covalently bound. After total RNase T1 hydrolysis of the covalent RNA-protein complex several high molecular weight RNA fragments were obtained and identified by sequencing. One fragment, sequence region U103 to U120, was shown to be directly linked to the protein first by protein specific staining of the particular fragment and second by phosphor cellulose chromatography of the covalent RNA-protein complex. The other two fragments, U89 to G106 and A34 to G51, could not be shown to be directly linked to L25 but were only formed under cross-linking conditions. While the fragment U89 to G106 may be protected from RNase T1 digestion because of a strong interaction with the covalent RNA-protein complex, the formation of the fragment A34 to G51 is very likely the result of a double monovalent modification of two neighbouring guanosines in the 5S RNA. The RNA sequences U103 to U120 established to be in direct contact to the protein L25 within the ribosome falls into the sequence region previously proposed as L25 binding site from studies with isolated 5S RNA-protein complexes. |
| Starting Page | 3953 |
| File Format | |
| ISSN | 13624962 |
| e-ISSN | 13624962 |
| Journal | Nucleic Acids Research |
| Issue Number | 11 |
| Volume Number | 13 |
| Language | English |
| Publisher Date | 1985-06-11 |
| Access Restriction | Open |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Genetics |
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