第七章 RNa Processing In both prokaryotes and eukaryotes, primary RNA transcripts undergo various alteration or processing events to become mature RNAs The three commonest types are: 1, nucleotide removal by nucleases 2. nucleotide addition to the 5,-or 3-end 3. nucleotide modification on the base or the sugar
第七章 RNA Processing In both prokaryotes and eukaryotes, primary RNA transcripts undergo various alteration or processing events to become mature RNAs: The three commonest types are: 1, nucleotide removal by nucleases; 2, nucleotide addition to the 5’- or 3’-end, 3, nucleotide modification on the base or the sugar
第-节 IRNa processing and ribosomes rRNa processing in prokaryotes 1 Seven different operons for rRNA dispersed thought out the genome. 2 The primary transcript is 30S (6000nt). 3 Each contains one copy of 5S, 16s and 23S rRNA, together with some tRNA sequence. 4\ Rnase ll is involved in rrna processing
第一节 rRNA processing and ribosomes 一、rRNA processing in prokaryotes 1、 Seven different operons for rRNA dispersed thought out the genome. 2、The primary transcript is 30S (~6000nt). 3、 Each contains one copy of 5S,16S and 23S rRNA, together with some tRNA sequence. 4、 Rnase III is involved in rRNA processing
30S transcript fizEpaL gif
30S transcript
Primary rrNa processing in prokaryotes Pre-16SrrNa Pre-t RNA Pre-23SrRNA Pre-tRNA Pre-5S rRNA Primary transcript RNase Precursors MaturerRNA
Primary rRNA processing in prokaryotes Pre-16S rRNA Pre-t RNA Pre-23S rRNA Pre-tRNA Pre-5S rRNA Precursors Mature rRNA Primary transcript RNase
5 The rrNa folds up into stem-loop structures by base pairing in the transcript Central domain l6 SrrNA的二级结构 5 end 3 major domai 3 5 domain minor domain
16S rRNA的二级结构 5、The rRNA folds up into stem-loop structures by base pairing in the transcript