TABLE 7.

Support or lack thereof from the individual aminoacyl-tRNA synthetases for various major bacterial taxonomic groupings

Taxonomic groupa	Support for presence of aminoacyl-tRNA synthetaseb:
	F	L	I	M	V	S	P	T	A	Y	H	K	D	E	C	W	R	G
Proteobacteria
β,γ	tsd	tsd	tsd	tsd	tsd	tsd	tsd	tsd	tsd	∗	tsd	tsd	tsd	tsd	tsd	∗	tsd	ts
α,β,γ	t d	ts	ts	−	s	tsd	tsd	tsd	tsd	∗	∗	−		tsd	sd	∗	−	s
α,β,γ,ɛ	d	ts	ts	−	s			−	ts	∗	−	−		ts	s	∗	−	s
β,γ,ɛ												t	s
Bacillus-Streptococcus
BES	tsd	tsd	tsd	tsd	tsd	ts	tsd	tsd	tsd	∗	tsd	tsd	tsd	tsd	t d	∗	−	t
BES,Cl	d	−	−	tsd	sd	tsd	s			∗	−	sd	d	−	t d	∗	−	−
BES,My	sd	s	tsd	s	s	td	−	sd	sd	∗	s	sd		tsd		∗	−	−
BES,Mb		d	−	−	s	−										∗	−	−
BES,Cl,My	s	−	−	s	ts		−							−		∗	−	−
Spirochetes	tsd	s	tsd	tsd	ts	ts	−	−	tsd	tsd	ts	tsd	tsd	tsd	ts	ts	tsd	tsd
Cytophaga-Chlorobium	ts	s	tsd	tsd	ts	ts	tsd	ts	tsd	−	−	tsd	−	tsd	ts	−	−	tsd
Deinococcus-Thermus	tsd	ND	+	tsd	tsd	ts	ND	+	tsd	+	tsd	tsd	tsd	tsd	+	+	+	tsd

^aTaxonomic abbreviations are more or less evident: α, β, etc., are the various divisions of the Proteobacteria. BES, Bacillus-Enterococcus-Streptococcus taxon; Cl, Clostridium acetobutylicum; My, mycoplasmas; Mb, mycobacteria. 

^bThe amino acids are given their one-letter codes. t, monophyletic (orthophyletic) unit in corresponding phylogenetic tree; s, signature analysis supports the unit; d, dipeptide similarity supports the unit; ∗, relationships too complex to be displayed in this tabular form; −, relationship definitely ruled out; + (in Deinococcus row), specific relationship can be detected using BLAST scores for Thermus provided by the Göttingen Website (www.g2l.bio.uni-goettingen.de); ND (in Deinococcus row), no definitive data available.