Last modified on 14 July 2000.
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 | ||||||||
162 | 99 | AAC | A, U | GNRA | 120 | 99 | AAC | U | |
622 | 99 | AAC | U | 5 | 510 | 99 | AAC | ||
696 | 100 | AAU | A, U | 6* | 959 | 100 | AAU | A, GA | |
1170 | 97 | AAA | 5* | 1005 | 51 | AAU | |||
1519 | 97 | AAG | A | GNRA | |||||
23 S rRNA | |||||||||
23 S rRNA | 182 | 56 | AAC | A | |||||
127 | 100 | AAC | A | GNRA | 218 | 61 | AAA | ||
390 | 72 | AAA | 7 | 223 | 94 | AAU | A, GA, U | ||
752 | 92 | AAA | U | 8* | 300 | 99 | AAC | EL | |
1085 | 100 | AAA | U | 3 | 429 | 98 | AAA | ||
1367 | 66 | AAG | GNRA | 483 | 58 | AAC | A, U | ||
1635 | 55 | AAU | A | 5* | 735 | 99 | AAC | ||
2311 | 84 | AAU | 7 | 793 | 61 | AAA | A, GA | ||
821 | 100 | AAU | U | ||||||
Internal Loops | 1275 | 99 | AAA | ||||||
16 S rRNA | 1302 | 68 | AAG | ||||||
374 | 100 | AAU | A | 1610 | 100 | AAC | |||
449 | 52 | AAG | E | 1786 | 100 | AAA |   | ||
676 | 100 | AAU | A, GA | 1978 | 100 | AAC | A | ||
782 | 100 | AAC | A, EL | 2199 | 100 | AAC | A, GA, U | ||
909 | 100 | AAC | A, E | 2287 | 65 | AAA | A, GA | ||
1447 | 94 | AAC | 2426 | 98 | AAC | U | |||
2433 | 100 | AAA | U | ||||||
23 S rRNA | 2734 | 50 | AAG | ||||||
257 | 60 | AAG | E | ||||||
346 | 89 | AAA | Bulge Loops | ||||||
515 | 100 | AAC | U | 16 S rRNA | |||||
677 | 82 | AAC | 51 | 87 | AAC | ||||
901 | 60 | AAC | 72 | 58 | AGC | ||||
911 | 100 | AAC | 642 | 51 | AAC | ||||
1143 | 100 | AAA | |||||||
1322 | 71 | AAG | 23 S rRNA | ||||||
1655 | 99 | AAC | A | 1900 | 89 | AAA | |||
2015 | 90 | AAU | |||||||
2741 | 100 | AAC | A, 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.