CRW: A Story - Manuscript Table 5

Last modified on 14 July 2000.


Table 5. A-motif: AA sites in 16 S and 23 S rRNA a

Position b Percent AA c Sequence d Predicted Structure Motifs e Loop f Position Percent AA Sequence Predicted Structure Motifs
Hairpin Loops Multi-Stem Loops
16 S rRNA 16 S rRNA
16299AACA, UGNRA 12099AACU
62299AACU5 51099AAC 
696100AAUA, U6* 959100AAUA, GA
117097AAA 5* 100551AAU 
151997AAGAGNRA
23 S rRNA
23 S rRNA 18256AACA
127100AACAGNRA 21861AAA 
39072AAA 7 22394AAUA, GA, U
75292AAAU8* 30099AACEL
1085100AAAU3 42998AAA
136766AAG GNRA 48358AACA, U
163555AAUA5* 73599AAC 
231184AAU 7 79361AAAA, GA
821100AAUU
Internal Loops 127599AAA 
16 S rRNA 130268AAG 
374100AAUA  1610100AAC 
44952AAGE  1786100AAA 
676100AAUA, GA  1978100AACA
782100AACA, EL  2199100AACA, GA, U
909100AACA, E  228765AAAA, GA
144794AAC   242698AACU
2433100AAAU
23 S rRNA 273450AAG 
25760AAGE 
34689AAA   Bulge Loops
515100AACU  16 S rRNA
67782AAC   5187AAC 
90160AAC   7258AGC 
911100AAC   64251AAC 
1143100AAA  
132271AAG   23 S rRNA
165599AACA  190089AAA 
201590AAU 
2741100AACA, GA, U

a rRNA positions have an AA motif in more than 50% of the bacterial sequences and are indicated in orange on Figure 5. b The position number is the nucleotide at the 3’ loop end, at the loop-helix junction. c More detailed information is available at http://www.rna.icmb.utexas.edu/ANALYSIS/A-STORY/. d Most prevalent loop-helix sequence. e A, AA.AG@helix.ends; E, E loop; EL, E-like loop; GA, tandem G:A; U, U-turn (see discussion). f Hairpin loop size and special characteristics: GNRA, tetraloops (Woese et al. 1990) occur in more than 70% of the bacterial rRNA sequences; *, unusually stable G:A or U:U first mismatch.