Key result
The 610-nucleotide 9S kinetoplast ribosomal RNA from Leishmania tarentolae exhibits a minimal secondary structure preserving all four domains of the E. coli 16S model.
The kinetoplast 9S rRNA of Leishmania tarentolae has a minimal secondary structure that preserves the main features of E. coli 16S rRNA, providing insight into the minimal requirements for a functional small subunit rRNA.
No immediate clinical application; leaves open whether minimal rRNA domains inform mitochondrial translation in cardiovascular models.
The portion of the Leishmania tarentolae kinetoplast maxicircle DNA encoding the 9S RNA gene was sequenced, and the 5' and 3' ends of the transcript were determined. A secondary structure for the 9S RNA was determined based on the Escherichia coli 16S model. The 610-nucleotide 9S RNA exhibits a minimal secondary structure in which all four domains of the E. coli 16S structure are preserved. Within domains, however, some stems and loops have been greatly reduced or eliminated entirely. It is presumed that these reduced domains represent the minimal essential small ribosomal RNA secondary structures necessary for a functional ribosome. Alignment of the L. tarentolae 9S rRNA sequence with the published Trypanosoma brucei 9S rRNA sequence shows a nucleotide similarity of 84% and a transversion/transition ratio of 1.66.
No takes yet. Share an insight, caveat, or question.
Cruz et al. (1985) studied Leishmania tarentolae kinetoplast RNA. The 610-nucleotide 9S kinetoplast ribosomal RNA from Leishmania tarentolae exhibits a minimal secondary structure preserving all four domains of the E. coli 16S model.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: