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Glimmer3

Table 5:  Glimmer3 long-orfs and Glimmer2.13 long-orfs Compared to All Annotated Genes

This table compares the accuracy of the outputs of the Glimmer3 version of the long-orfs program with the output of Glimmer2.13 long-orfs. Program long-orfs is used to create a set of orfs that can be used to train the ICM model used by the main Glimmer gene-prediction program. The 30 microbial genomes were obtained from RefSeq at GenBank. The test set of genes was all annotated genes at least 90bp long, without frameshifts or in-frame stops.
Both versions of long-orfs were run in default mode, i.e., they both computed the orf length L that maximized the number of non-overlapping orfs of length L or greater. The Glimmer3 version of long-orfs was run with a "-t 1.15" option to first filter the set of candidate orfs based on amino-acid composition before computing L. For high-GC genomes in particular, this results in a much larger training set of orfs.
"Matches" are predictions that had the same reading frame and stop codon as an annotated gene in the test set. "Extra" are predictions that are not matches. Start-codon information is not included in this table because the long-orfs programs automatically choose the most upstream start codon.
The columns labelled "G3 vs. G2.13" are the Glimmer3 value minus the corresponding Glimmer2.13 value. For example, an entry of "+2" in the "Matches" column means that Glimmer3 had 2 more matches than Glimmer2.13 on the genome for that row.
Genome  Glimmer3 long-orfs  Glimmer2.13 long-orfs G3 vs. G2.13
Organism Length GC% # Genes Matches Extra Matches Extra Matches Extra
Archaeoglobus fulgidus 2.18Mb 48.6 2398 1083 45.2% 26 706 29.4% 18 +377 +15.7% +8
Bacillus anthracis 5.23Mb 35.4 5308 3494 65.8% 194 2934 55.3% 160 +560 +10.6% +34
Bacillus subtilis 4.21Mb 43.5 4095 2647 64.6% 21 2062 50.4% 21 +585 +14.3% 0
Campylobacter jejuni 1.78Mb 30.3 1836 1347 73.4% 58 743 40.5% 43 +604 +32.9% +15
Carboxydothermus hydrogenoformans 2.40Mb 42.0 2606 1587 60.9% 42 1181 45.3% 27 +406 +15.6% +15
Caulobacter crescentus 4.02Mb 67.2 3737 1578 42.2% 53 388 10.4% 87 +1190 +31.8% -34
Chlorobium tepidum 2.15Mb 56.5 2252 943 41.9% 37 438 19.4% 30 +505 +22.4% +7
Clostridium perfringens 3.03Mb 28.6 2660 2111 79.4% 16 1885 70.9% 16 +226 +8.5% 0
Colwellia psychrerythraea 5.37Mb 38.0 4902 3543 72.3% 31 3143 64.1% 21 +400 +8.2% +10
Dehalococcoides ethenogenes 1.47Mb 48.9 1579 807 51.1% 33 595 37.7% 20 +212 +13.4% +13
Escherichia coli 4.64Mb 50.8 4231 2754 65.1% 39 1815 42.9% 17 +939 +22.2% +22
Geobacter sulfurreducens 3.81Mb 60.9 3438 1432 41.7% 59 553 16.1% 61 +879 +25.6% -2
Haemophilus influenzae 1.83Mb 38.1 1649 1281 77.7% 51 1088 66.0% 41 +193 +11.7% +10
Helicobacter pylori 1.67Mb 38.9 1556 1141 73.3% 20 831 53.4% 10 +310 +19.9% +10
Listeria monocytogenes 2.91Mb 38.0 2819 2005 71.1% 29 1607 57.0% 21 +398 +14.1% +8
Methylococcus capsulatus 3.30Mb 63.6 2958 1053 35.6% 60 302 10.2% 70 +751 +25.4% -10
Mycobacterium tuberculosis 4.40Mb 65.6 4189 1500 35.8% 44 866 20.7% 37 +634 +15.1% +7
Neisseria meningitidis 2.27Mb 51.5 2055 994 48.4% 70 537 26.1% 50 +457 +22.2% +20
Porphyromonas gingivalis 2.34Mb 48.3 1909 950 49.8% 54 639 33.5% 34 +311 +16.3% +20
Pseudomonas fluorescens 7.07Mb 63.3 6134 2873 46.8% 71 579 9.4% 129 +2294 +37.4% -58
Pseudomonas putida 6.18Mb 61.5 5349 2616 48.9% 121 836 15.6% 99 +1780 +33.3% +22
Ralstonia solanacearum 3.72Mb 67.0 3435 1133 33.0% 42 157 4.6% 131 +976 +28.4% -89
Staphylococcus epidermidis 2.62Mb 32.1 2487 1797 72.3% 40 1480 59.5% 27 +317 +12.7% +13
Streptococcus agalactiae 2.16Mb 35.6 2122 1589 74.9% 44 1224 57.7% 38 +365 +17.2% +6
Streptococcus pneumoniae 2.16Mb 39.7 2093 1289 61.6% 67 1001 47.8% 50 +288 +13.8% +17
Thermotoga maritima 1.86Mb 46.2 1854 797 43.0% 20 448 24.2% 14 +349 +18.8% +6
Treponema denticola 2.84Mb 37.9 2761 1839 66.6% 18 1426 51.6% 16 +413 +15.0% +2
Treponema pallidum 1.14Mb 52.8 1034 507 49.0% 7 379 36.7% 6 +128 +12.4% +1
Ureaplasma parvum 0.75Mb 25.5 614 400 65.1% 0 338 55.0% 9 +62 +10.1% -9
Wolbachia endosymbiont 1.08Mb 34.2 805 536 66.6% 43 441 54.8% 41 +95 +11.8% +2
Averages:    57.4%     38.9%   +566 +18.6% +2