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Primary structure of rabbit 18S ribosomal RNA determined by direct RNA sequence analysis
Nucleic Acids Research
|June 11, 1984
Summary
Researchers sequenced rabbit 18S ribosomal RNA (rRNA) to understand its structure. Key functional regions of bacterial 16S rRNA were found to be conserved in rabbit 18S rRNA, suggesting similar roles in eukaryotic cells.
Area of Science:
- Molecular Biology
- Genomics
- Biochemistry
Background:
- Ribosomal RNA (rRNA) is crucial for protein synthesis.
- Understanding the primary structure of eukaryotic rRNA provides insights into ribosome function.
Purpose of the Study:
- To determine the complete nucleotide sequence of rabbit 18S ribosomal RNA (rRNA).
- To identify conserved functional regions by comparing with bacterial rRNA.
Main Methods:
- Direct nucleotide sequence analysis of rabbit 18S rRNA.
- Enzymatic and chemical cleavage of labeled rRNA fragments.
- High-resolution polyacrylamide gel electrophoresis for sequence determination.
- Use of T1 ribonuclease and RNase H with a DNA linker for fragmentation.
Main Results:
- The complete primary structure of rabbit 18S rRNA was elucidated.
- Detection of cistron heterogeneities and modified bases was achieved.
- Conserved nucleotide sequences homologous to functionally important regions of E. coli 16S rRNA were identified.
Conclusions:
- The determined rabbit 18S rRNA sequence provides a foundational resource for eukaryotic ribosome research.
- Conserved sequences suggest similar roles in tRNA binding, polyribosome function, and subunit association within the 40S ribosomal subunit.