Table 1.
Summary statistics of the dataset used in this study. MicroRNA genes detected by homology search relative to the contents of the MR 6.0.
| Genome | MR 6.0 | known | new | all |
| hsa | 227 | 215+12 | 23 | 238 |
| ptr | - | 0 | 183 | 183 |
| cfa | 6 | 6 | 195 | 201 |
| bta | - | 0 | 138 | 138 |
| mmu | 230 | 215+17 | 26 | 241 |
| rno | 191 | 180+6 | 39 | 219 |
| mdo | - | 0 | 139 | 139 |
| gga | 122 | 122 | 17 | 139 |
| xla/xtr | (7) | (7) | 126 | 133 |
| tru | - | 0 | 171 | 171 |
| tni | - | 0 | 179 | 179 |
| ola | - | 0 | 152 | 152 |
| dre | 33 | 60 | 205 | 265 |
| spu | - | 0 | 40 | 40 |
| cin | - | 0 | 6 | 6 |
| csa | - | 0 | 3 | 3 |
| odi | - | 0 | 5 | 5 |
| dme | 78 | 78 | 0 | 78 |
| dps | 73 | 72 | 0 | 72 |
| dya | - | 0 | 74 | 74 |
| dan | - | 0 | 64 | 64 |
| dvi | - | 0 | 67 | 67 |
| dmo | - | 0 | 69 | 69 |
| aga | 38 | 42 | 10 | 52 |
| tca | - | 0 | 24 | 24 |
| ame | 25 | 26 | 12 | 38 |
| bmo | - | 0 | 17 | 17 |
| cel | 116 | 117 | 2 | 119 |
| cbr | 79 | 82 | 3 | 85 |
| sma | - | 0 | 4 | 4 |
| Σ | 1222 | 1993 | 3215 | |
The set of "known" microRNAs differs in some cases from MR 6.0 because some database entries could not be mapped to the current genome assembly, or mapped to more than one genomic locus. The mir-134 cluster is excluded from this list (its known members are indicated separately for human, mouse and rat in the MR 6.0 column). The last column ("all") provides the statistics for the data set provided in the electronic supplement, the column "new" lists all those pre-miRNA sequences that were detected by homology search and are contained in MR 6.0. For Xenopus 7 microRNAs were reported for Xenopus laevis, a close relative of the sequenced Xenopus tropicalis.
Species abbreviations.
Mammals: hsa, Hs: Homo sapiens; ptr, Pt: Pan troglodytes; cfa, Cf: Canis familiaris; bta, Bt: Bos taurus; mmu, Mm: Mus musculus; rno, Rn: Rattus norvegicus; mdo, Md: Monodelphis domesticus; other tetrapods: gga, Gg: Gallus gallus; xla: Xenopus laevis; xtr, Xt: Xenopus tropicalis; teleost fishes: tru, Tr: Takifugu rubripes; tni, Tn: Tetraodon nigroviridis; dre, Dr: Danio rerio; basal deuterostomes: spu, Sp: Strongylocentrotus purpuratus; cin, Ci: Ciona intestinalis; csa, Cs: Ciona savignyii; odi, Od: Oikopleura dioica; insects: dme, Dm: Drosophila melanogaster, dps, Dp: Drosophila pseudoobscura, dya, Dy: Drosophila yakuba, dan, Da: Drosophila ananassae, dvi, Dv: Drosophila viridis, dmo, Do: Drosophila mohavensis, aga, Ag: Anopheles gambiae, tca, Tc: Tribolium castaneum, ame, Am: Apis mellifera, bmo, Bm: Bombyx mori, nematods: cel, Ce: Caenorhabditis elegans, cbr, Cb: Caenorhabditis briggsae, platyhelmint: sma, Sm: Schistosoma mansoni.