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Table 1 Genome sizes, protein numbers and GC contents of sequenced alpha-proteobacteria

From: Phylogenomics and signature proteins for the alpha Proteobacteria and its main groups

Species Name Order Family Genome Size (Mb) GC content (%) Protein Number Reference
Bartonella bacilliformis KC583 Rhizobiales Bartonellaceae 1.4 38.2 1283 TIGR
Bartonella henselae str. Houston-1 Rhizobiales Bartonellaceae 1.93 38.2 1488 [7]
Bartonella quintana str. Toulouse * Rhizobiales Bartonellaceae 1.58 38.8 1142 [7]
Bradyrhizobium japonicum USDA 110* Rhizobiales Bradyrhizobiaceae 9.1 64.1 8317 [5]
Bradyrhizobium japonicum BT Ail Rhizobiales Bradyrhizobiaceae 8.53 64.8 7622 DOE-JGI
Bradyrhizobium sp. ORS278 Rhizobiales Bradyrhizobiaceae 7.5 65.5 6717 Genoscope
Nitrobacter hamburgensis X14 Rhizobiales Bradyrhizobiaceae 5.01 61.6 4326 DOE-JGI
Nitrobacter winogradskyi Nb-255* Rhizobiales Bradyrhizobiaceae 3.4 2.5 3122 [42]
Rhodopseudomonas palustris BisA53 Rhizobiales Bradyrhizobiaceae 5.51 64.4 4878 DOE-JGI
Rhodopseudomonas palustris BisB18 Rhizobiales Bradyrhizobiaceae 5.51 65.0 4886 DOE-JGI
Rhodopseudomonas palustris BisB5 Rhizobiales Bradyrhizobiaceae 4.89 64.8 4397 DOE-JGI
Rhodopseudomonas palustris CGA009 Rhizobiales Bradyrhizobiaceae 5.47 65.0 4820 [41]
Rhodopseudomonas palustris HaA2 Rhizobiales Bradyrhizobiaceae 5.33 66.0 4683 DOE-JGI
Brucella abortus biovar 1 str. 9–941 Rhizobiales Brucellaceae 3.29 57.2 3085 [69]
Brucella melitensis 16M Rhizobiales Brucellaceae 3.29 57.2 3198 [38]
Brucella melitensis biovar Abortus 2308 Rhizobiales Brucellaceae 3.28 57.2 3034 [39]
Brucella suis 1330* Rhizobiales Brucellaceae 3.32 57.3 2123 [40]
Brucella ovis ATCC 25840 Rhizobiales Brucellaceae 3.3 57.2 2892 TIGR
Mesorhizobium loti MAFF303099* Rhizobiales Phyllobacteriaceae 7.6 62.5 7372 [6]
Mesorhizobium sp. BNC1 Rhizobiales Phyllobacteriaceae 4.94 61.1 4543 DOE-JGI
Agrobacterium tumefaciens str. C58 Rhizobiales Rhizobiaceae 5.67 59.0 4661 [37]
Rhizobium etli CFN 42 Rhizobiales Rhizobiaceae 6.53 61.0 5963 [35]
Rhizobium leguminosarum bv. viciae 3841 Rhizobiales Rhizobiaceae 7.75 61.0 7263 [81]
Sinorhizobium meliloti 1021 Rhizobiales Rhizobiaceae 6.69 62.2 6205 [36]
Caulobacter crescentus CB15* Caulobacterales Caulobacteraceae 4.02 67.2 3737 [51]
Hyphomonas neptunium ATCC 15444 Caulobacterales+ Hyphomonadaceae 3.71 61.9 3505 [46]
Maricaulis maris MCS10 Caulobacterales+ Hyphomonadaceae 3.37 62.7 3063 DOE-JGI
Jannaschia sp. CCS1 Rhodobacterales Rhodobacteraceae 4.4 62.2 4212 DOE-JGI
Paracoccus denitrificans PD1222 Rhodobacterales Rhodobacteraceae 5.25 66.8 5077 DOE-JGI
Rhodobacter sphaeroides 2.4.1* Rhodobacterales Rhodobacteraceae 4.45 68.8 4242 DOE-JGI
Rhodobacter sphaeroides ATCC 17025 Rhodobacterales Rhodobacteraceae 4.54 68.2 4333 DOE-JGI
Rhodobacter sphaeroides ATCC 17029 Rhodobacterales Rhodobacteraceae 4.42 69.0 4132 DOE-JGI
Roseobacter denitrificans OCh 114 Rhodobacterales Rhodobacteraceae 4.3 58.9 4129 [44]
Silicibacter pomeroyi DSS-3 Rhodobacterales Rhodobacteraceae 4.6 64.1 4252 [45]
Silicibacter sp. TM1040* Rhodobacterales Rhodobacteraceae 4.15 60.1 3864 DOE-JGI
Gluconobacter oxydans 621H* Rhodospirillales Acetobacteraceae 2.92 60.8 2664 [56]
Granulibacter bethesdensis CGDNIH1 Rhodospirillales Acetobacteraceae 2.7 59.1 2437 Rocky Mountain Lab
Acidiphilium cryptum JF-5 Rhodospirillales Acetobacteraceae 3.97 67.1 3564 DOE-JGI
Magnetospirillum magneticum AMB-1 Rhodospirillales Rhodospirillaceae 4.97 65.1 4559 [57]
Rhodospirillum rubrum ATCC 11170* Rhodospirillales Rhodospirillaceae 4.41 65.4 3841 DOE-JGI
Candidatus Pelagibacter ubique HTCC1062 Rickettsiales - 1.3 29.7 1354 [2]
Anaplasma marginale str. St. Maries Rickettsiales Anaplasmataceae 1.2 49.8 949 [70]
Anaplasma phagocytophilum HZ Rickettsiales Anaplasmataceae 1.47 41.6 1264 [71]
Ehrlichia canis str. Jake Rickettsiales Anaplasmataceae 1.32 29.0 925 DOE-JGI
Ehrlichia chaffeensis str. Arkansas Rickettsiales Anaplasmataceae 1.18 30.1 1105 [71]
Ehrlichia ruminantium str. Gardel Rickettsiales Anaplasmataceae 1.5 27.5 950 [72]
Ehrlichia ruminantium str. Welgevonden Rickettsiales Anaplasmataceae 1.52 27.5 888 [73]
Neorickettsia sennetsu str. Miyayama Rickettsiales Anaplasmataceae 0.86 41.1 932 [71]
Rickettsia bellii RML369-C Rickettsiales Rickettsiaceae 1.52 31.6 1429 [74]
Rickettsia conorii str. Malish 7 Rickettsiales Rickettsiaceae 1.27 32.4 1374 [75]
Rickettsia felis URRWXCal2 Rickettsiales Rickettsiaceae 1.59 32.5 1512 [76]
Rickettsia prowazekii str. Madrid E Rickettsiales Rickettsiaceae 1.11 29.0 835 [77]
Rickettsia typhi str. Wilmington Rickettsiales Rickettsiaceae 1.11 28.9 838 [78]
Wolbachia endosymbiont (Drosophila)* Rickettsiales Rickettsiaceae 1.27 35.2 1195 [79]
Wolbachia endosymbiont (Brugia malayi) Rickettsiales Rickettsiaceae 1.08 34.2 805 [80]
Erythrobacter litoralis HTCC2594 Sphingomonadales Erythrobacteraceae 3.05 63.1 3011 GBM Foundation
Novosphingobium aromaticivorans DSM 12444* Sphingomonadales Sphingomona-daceae 3.56 65.2 3937 DOE-JGI
Sphingopyxis alaskensis RB2256 Sphingomonadales Sphingomona-daceae 3.37 65.5 3195 DOE-JGI
Sphingomonas wittichii RW1 Sphingomonadales Sphingomona-daceae 5.93 67.9 5345 DOE-JGI
Zymomonas mobilis subsp. mobilis ZM4 Sphingomonadales Sphingomona-daceae 2.06 46.3 1998 [53]
  1. * indicates species that were used in blast searches
  2. + Although these species are classified as Rhodobacterales, results presented here and elsewhere [29,47] suggest their placement in the Caulobacterales.
  3. DOE-JGI, Department of Energy, Joint Genome Institute; GBM, The Gordon and Betty Moore Foundation Marine Microbiology Initiative; TIGR, The Institute for Genome Research.