Table 3

Membership composition of Tryptophan Congruency Groupsa

TCG-1
[Corynebacterium diptheriae]b

[Corynebacterium glutamicum]b

Escherichia coli

Haemophilus influenzae

[Helicobacter pylori]b

Shewanella putrefaciens

Vibrio cholerae

Actinobacillus actinomycetemcomitans

Buchnera aphidicolac

Blochmannia floridanusc

[Corynebacterium efficiens]b

Erwinia carotovora

Klebsiella pneumoniae

Pasteurella multocida

Photorhabdus luminescens

Salmonella enterica

Shigella flexneri

Vibrio parahaemolyticus

Vibrio vulnificus

Yersinia pestis
TCG-2d
Burkholderia fungorum

Methylococcus capsulatus

Neisseria meningitidis

Nitrosomonas europaea

Pseudomonas aeruginosa*

Pseudomonas syringae*

Ralstonia metallidurans

Thiobacillus ferrooxidans

Xanthomonas campestris

Xylella fastidiosa

Acinetobacter sp.

Azotobacter vinelandii*

Bordetella bronchisepticum

Bordetella parapertussis

Bordetella pertussis

Burkholderia cepacia

Burkholderia multivorans

Chromobacterium violaceum

Microbulbifer degradans

Neisseria gonorrhoeae

Pseudomonas fluorescens*

Pseudomonas putida*

Psychrobacter sp.

Ralstonia solanacearum

Xanthomonas axonopodis
TCG-3
Caulobacter crescentus

Rhodobacter sphaeroides

Sphingomonas aromaticivorans

Agrobacterium tumefaciens

Bradyrhizobium japonicum

Brucella melitensis

Brucella suis

Rhizobium loti

Rhodopseudomonas palustris

Sinorhizobium meliloti
TCG-4
Anabaena (Nostoc) sp. PCC 7120

Nostoc punctiforme

Prochlorococcus marinus CCMP 1986 (MED4)

Synechococcus sp. WH8102

Synechocystis sp. PCC 6803

Anabaena variabilis ATCC 29413

Crocosphaera watsonii WH 8501

Gloeobacter violaceus PCC 2471

Prochlorococcus marinus CCMP1375 (SS120)

Prochlorococcus marinus MIT9313

Synechococcus elongatus PCC 7942

Thermosynechococcus elongatus BP-1

Tricodesmium erythraeum
TCG-5e
Streptomyces coelicolor

Mycobacterium tuberculosis

Thermomonospora fusca

Bifidobacterium longum

Mycobacterium avium

Mycobacterium bovis

Mycobacterium leprae

Mycobacterium smegmatis

Streptomyces avermitilis
TCG-6
Bacillus halodurans

Bacillus stearothermophilus

Bacillus subtilis

Oceanobacillus iheyensis
TCG-7
Bacillus anthracis

Lactococcus lactis

Listeria monocytogenes

Staphylococcus aureus

Streptococcus pneumoniae

Bacillus cereus

Listeria innocua

Staphylococcus epidermidis

Streptococcus gordonii

Streptococcus mutans

aEach tryptophan congruency group (TCG) defined by the concatenated tree for Trp proteins (Fig. 2) is congruent with the color-coded subtree section within the 16S rRNA tree (Fig. 1). Organisms that are included in the concatenated tree of Fig. 2 are indicated in boldface type, whereas additional organisms not included in the concatenated tree but that were qualitatively determined to belong to a given TCG are indicated in regular type. bTCG members originating by LGT are indicated within brackets and indented. cInsect symbionts. dThe five organisms marked with asterisks form a distinctive subclade that is, in fact, not a "pure" component of TCG-2 because of the LGT origins of trpEa and trpEb from TCG-3 (see text). eAll members of TCG-5 lack trpC and presumably utilize a dual-pathway hisA (priA) for this function.

Xie et al. BMC Biology 2004 2:15   doi:10.1186/1741-7007-2-15