| Bridge 1 | SSU positions 2 | LSU positions 2 | 3 Phylo | 3 Phylo + 2 Org | C. elegans | Bridge Type |
|---|---|---|---|---|---|---|
| B1a | S13 (92-94) | H38 (886-888) | Yes | No | No | RNA/Protein |
| B2a | H44 (1408-1410) | H69 (1913-1914, 1918) | Yes | Yes | Yes | RNA/RNA |
| B2b | H24 (784-785, 794) | H67 (1836-1837, 1922) | Yes | No | No | RNA/RNA |
| H45 (1516-1519) | H71 (1919-1920, 1932) | |||||
| B2c | H24 (770-771) | H67 (1832-1833) | Yes | Yes | Yes | RNA/RNA |
| H27 (900-901) | H67 (1832-1833) | |||||
| B3 | H44 (1484-1486) | H71 (1947-1948, 1960-1961) | Yes | Yes | Yes | RNA/RNA |
| B4 | H20 (763-764) | H34 (717-718) | Yes | No | No | RNA/Protein |
| S15 (40-44) | H34 (713, 717) | |||||
| B5 | H44 (1418-1419) | H64 (1768-1769) | Yes | No | No | RNA/Protein |
| H44 (1420-1422) | L14 (44-49) | |||||
| H44 (1474-1476) | H62 (1689-1690) | |||||
| H44 (1474-1476) | H64 (1989) | |||||
| B6 | H44 (1429-1430, 1474-1476) | H62 (1689-1690, 1702-1705) | Yes | No | No | RNA/Protein |
| H44 (1431) | L19 (Hm24e:R44) | |||||
| B7a | H23 (698, 702) | H68 (1848-1849, 1896) | Yes | No | No | RNA/RNA |
| B7b | H23 (712-713) | L2 (162-164, 172-174, 177-178) | Yes | Yes | ? 4 | RNA/Protein |
| H24 (773-776) | L2 (177-178, 198-202) | |||||
| B8 | H14 (345-347) | L14 (116-119) | Yes | No | No | RNA/RNA |
1 B1b not included because the bridge type is Protein/Protein.
2 Small subunit (SSU) and large subunit (LSU) positions are listed by helix (H) or protein (S or L) using E. coli numbering.
3 The positions are based on the crystal structure of the E. coli 70S ribosome (Yusupov et al., 2001, 1GIX and 1GIY).
4 The rRNA for B7b is conserved, but it is not known whether or not protein L2 is present. Therefore, we cannot say whether or not this contact exists in C. elegans.
