RNA-RNA and RNA-protein interactions in 30 S ribosomal subunits. Association of 16 S rRNA fragments in the presence of ribosomal proteins
- PMID: 1646122
- DOI: 10.1016/0014-5793(91)80600-8
RNA-RNA and RNA-protein interactions in 30 S ribosomal subunits. Association of 16 S rRNA fragments in the presence of ribosomal proteins
Abstract
The E. coli 16 S rRNA with single-site breaks centered at position 777 or 785 was obtained by RNase H site-specific cleavage of rRNA. Spontaneous dissociation of the cleaved 16 S rRNA into fragments occurred under 'native' conditions. The reassociation of the 16 S rRNA fragments was possible only in the presence of ribosomal proteins. The combination of S4 and S16(S17) ribosomal proteins interacting mainly with the 5'-end domain of 16 S rRNA was sufficient for reassociation of the fragments. The 30 S subunits with fragmented RNA at ca. 777 region retained some poly(U)-directed protein synthetic activity.
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