Table 1.
Comparison of general genome features among obligate insect mutualists
|
|
B. pennsylvanicus |
B. floridanus |
W. glossinidia |
Buchnera-BP |
Buchnera-SG |
Buchnera-APS |
E. coli K12 |
|---|---|---|---|---|---|---|---|
| Chromosome, bp | 791,654 | 705,557 | 697,724 | 615,980 | 641,454 | 640,681 | 4,639,221 |
| Plasmids | — | — | 1 | 1 | 2 | 2 | — |
| G+C content total, % | 29.6 | 27.38 | 22 | 25.3 | 26.3 | 26.2 | 50.8 |
| Total gene number | 658 | 636 | 677 | 553 | 629 | 621 | 4550 |
| ORFs | 610 | 590 | 621 (6) | 507 (3) | 554 (9) | 571 (9) | 4284 |
| rRNAs | 3 | 3 | 6 | 3 | 3 | 3 | 22 |
| tRNAs | 39 | 37 | 34 | 32 | 32 | 32 | 86 |
| RNAs | 2 | 2 | 2 | 2 | 2 | 2 | 8 |
| Pseudogenes | 4 | 4 | 14 | 9 | 38 | 13 | 150 |
| Chromosomal protein-coding regions, % | 76.7 | 83.8 | 86.9 | 80.9 | 83.1 | 86.7 | 87.8 |
| Average length CDS, bp
|
995
|
1,002
|
983
|
996
|
979
|
984
|
950
|
-
Total open reading frames (ORFs) include predicted genes located on plasmids (noted in parentheses). The repeated trpEG genes on Buchnera-APS and -SG plasmids were counted once. Minor discrepancies in gene numbers (ORFs and pseudogenes) from the original publications reflect our efforts to present the most current annotation data from the literature, available at GenBank (http://www.ncbi.nlm.nih.gov) and the Comprehensive Microbial Resource (CMR) database (http://www.tigr.org/tigr-scripts/CMR2/CMRHomePage.spl). Fusion of yidCD in B. pennsylvanicus counted as a single ORF.
