Table 3.
Number of BPh interactions occurring between secondary structure elements in E. coli 16S and 23 S rRNA (2avy and 2aw4), according to the range of the interaction
| Phosphate location |
|||||
|---|---|---|---|---|---|
| Helix | Hairpin | Internal | Junction | Total | |
| Short-range base–phosphate interactions | |||||
| Helix | 8 | 19 | 25 | 14 | 67 |
| Hairpin | 3 | 83 | 0 | 0 | 86 |
| Internal | 3 | 0 | 69 | 0 | 72 |
| Junction | 13 | 0 | 1 | 113 | 127 |
| Total | 27 | 102 | 95 | 127 | 353 |
| Long-range base–phosphate interactions | |||||
| Base location | |||||
| Helix | 24 | 5 | 5 | 6 | 42 |
| Hairpin | 10 | 7 | 9 | 11 | 37 |
| Internal | 15 | 2 | 5 | 5 | 27 |
| Junction | 15 | 4 | 7 | 4 | 31 |
| Total | 67 | 19 | 27 | 27 | 143 |
The data are tabulated according to the location of the base H-bond donor (rows) and phosphate acceptor (columns).